Musical Fidelity A1 - Sugden A21, how do they compare?

[@faithhopelove6945]

And today we have all the nice little Clones fpr $200-500..., and they sound great and 90% identical to the Original (: 😁

[@jos5067]

A very, very thorough review! You’re certainly one of the best reviewers out there (IHMO)! And above all, a very good advice for potential buyers at the end!

[@PearlAcoustics]

Thank you very much, you’re very kind.

[@karlludwigbonitz791]

Back in 1985 the original A1 couldn´t drive my Spendor 75/1 properly. But the A100 could, very beautifully, a match made in heaven that started me on a lifelong journey. I sold the amp to a friend who is still running it today.

[@PearlAcoustics]

That’s a great piece of background information. Thanks for sharing!

[@razisn]

About the A1' Class A. It is a PUSH- PULL amp. This means 2 things. Efficiency is in theory double when operating within Class A than what you mentioned (which is applicable to single ended Class A) and it can slide to class B if required, up to the limits of its rail voltage and power supply. The A1 is effectively a very high bias Class A/B fwiw. The Sugden, I believe, is single ended, being SE it can ONLY operate in Class A. Once it reaches what its bias voltage can provide it will clip.

[@PearlAcoustics]

Thanks for this. Very interesting 👍

[@hamidrezahabibi8111]

But here the A1 is compared to SUGDEN A21 which is different to SUGDEN A21SE SIGNATURE.

[@PearlAcoustics]

@@hamidrezahabibi8111 indeed, although I do briefly reference the A21SE too

[@corbincloward6199]

@@PearlAcoustics Time stamp?

[@DonHamlin]

Excellent, thoughtful review. You pick the most interesting pieces of gear to review.

[@PearlAcoustics]

Thank you, I appreciate that!

[@chewsk4152]

​@@PearlAcoustics2

[@medonk12rs]

That was a fun review, thanks! The sound sample in the end of the video is surprisingly revealing. Huge difference in sound - the A1 seems more groovy, but lacks the bass pluck/attack of the Sugden A21. Though call.

[@razisn]

Which is the A1 and which the A21 in your comment?

[@PearlAcoustics]

Thanks for your comment. Indeed, for me (in the listening room) the A21 was more revealing and had a tighter bass. But the difference was only subtle.

[@medonk12rs]

@@razisn oops... silly me. Thanks for the hint! The Sugden A21 is the one with my perception of bass pluck/detail. I'll edit the initial comment, if possible.

[@avro66]

I've had both CLASS A amplifiers from the 80s and was very happy with both, something special about CLASS A topology.

[@PearlAcoustics]

Indeed

[@kesm66]

Day one notes on the MF A1: Heat sink temp was taken with a meat thermometer (133.9 F). I can tolerate my outstretched hand on the heat sink for around 5-7 seconds. Now with that out of the way…I have no major complaints with this amp. I have it on a A/B switcher with a Sugden A21SE. The MF A1 holds it own. I cannot say one is ‘better’ than the other. I think it will likely come down to listener preference if one is choosing between the two. The Sugden seems to have the slight edge in detail retrieval. The MF A1 bass sounds deeper (more grunt-gutsy)…& this tactile feeling in tonal quality seems to extend to the overall signature of the MF A1 amp. I had difficultly making the distinction between the two amps beyond these slight nuances. Both present music in a palpable way. These amp sources are more similar than dissimilar (to my ears). I think the MF A1 glosses over recordings moreso than the Sugden A21SE. This isn’t necessarily a bad thing…seems like it would benefit or ‘play nice’ with poorer recordings. I don’t know that there’s a fault or edge either way between the two power sources. The voices on the Sugden sound forward (sharper with sparkle). The voices on the MF A1 sound slightly further away or blended into the mix/recording. The Sugden casts the voices to the front of the mix. The listener is rewarded by both units with an emotional connection that class A/B amps, that I’ve had, seemingly cannot match (Krell Vanguard, Hegel H390). Particularly if you prefer a warmish sound signature. I don’t find either amp overly warm in sound signature despite the chassis heat😅 Those seeking neutrality, cool/detailed/clinical sound signature (often associated with equipment that ‘measures well’) will likely be displeased. Albeit I don’t think that user profile would seek a Class A amp. My source is an Oppo 205 (Russ Andrew’s mod). Speakers are Salk Song 3 Encores (88 db) & Spendor Classic 4/5 (84 db). Note: Sugden A21SE temp was taken; topped out @ 93.9 F.

[@PearlAcoustics]

Thank you for a marvellous contribution to the topic.

[@Rob1972Gem]

I always think when people are over analytical about their music they have gone past the point of just laying back chilling out and loving the music in a way. I feel sorry for them because they’ve lost the ability to zone out and just love the music they have this bad habit of needing to analyse it which if you were sound engineer, I understand where they’re coming from but if you’re meant to be enjoying the music don’t analyse it you’re ruin the fun, and the moment that all being said the sudden better amplifier all round I’ve never understood the fascination for the musical facility it used to go wrong overheat and break in any of the industry that would be a big no-no yet for some reason it’s got a following

[@ptbfrch]

For some, the analysis is the fun part, and that is no less valid than 'just enjoying the music'. Many are somewhere in between, doing both, in varying proportions.

[@PearlAcoustics]

You make an interesting point. I am one of those people that can switch between the two. I guess it’s a kind of ‘work’ thing. When I am working, I am listening very closely. When I am chilled and out of the work environment, it’s just music. But sometimes I slip between the two. And both can be enjoyable in their own way.

[@1999zrx1100]

I have found over the many years in audio that there’s a fine line between more detail and listening fatigue. It’s so frustrating and hard to have one without the other. I personally think that’s why many are constantly changing out gear. 🤓

[@PearlAcoustics]

@@1999zrx1100 good point. Personally I find some class A equipment offers a suitable balance for me. But I totally get where you are coming from. Always a good idea to have two amplifiers, if you can afford it!

[@Skyshakerrrr]

​@PearlAcoustics I bought the a1 to tame my bright sounding kantas no1 focal speakers. And it work I'm able to listen to them for hours and hours. Thks

[@Temmple]

A1 for me. More of a natural presentation. Paired with the right speaker could be a match made in heaven. Will be testing this amp with the 1TDx in the near future.

[@jungtarcph]

Did anyone compare the "new" Musical Fidelity to an old one? I saw a few of the old ones for sale that look reasonable.

[@PearlAcoustics]

That’s an interesting thought! Thanks for sharing…

[@iikatinggangsengii2471]

yeah it sounds more like my devices, not chord hegel or lessfox

[@iikatinggangsengii2471]

the sony pairing really great sounding though technically just lacks soundstage and clarity

[@audio_acoustic_engineering]

Excellent review! I heard this amp with the Fyne Audio F502 speakers, and eversolo streamer DAC and OMG I loved it! Heavy bass yes. Musical, yes. Now I’m very interested to compare detail oriented amp vs musical. I get it.

[@PearlAcoustics]

Thank you!

[@marktupper2375]

Back in the day I had an MF A1 MK2 with a pair of floor standing Monitor Audios playing all sorts - Big time thumbs up !!

[@johngallagher5443]

Thank you! Awesome review and comparison of these two amps, Happy New Year to you and your family!🎉

[@PearlAcoustics]

Happy new year! Thank you John!

[@raphaelmeillat8527]

Great video review as usual! Interesting exercise at the end of the video. Was listening to the comparison through a pair of headphones. Not a huge difference overall, but after repeat back and forth, Sugden definitely offers a wider soundstage, more 3D like as well. Yet, I prefer the singer's voice through Musical Fidelity's A1! So that's a tough call!

[@PearlAcoustics]

Thanks for your kind comment and interest point on the comparison. Indeed the vocals are a bit ‘warmer’

[@shan-junlu8238]

Auditioned a bunch of amp irl. While it isn’t perfect, Musical Fidelity’s calling card is certainly how incredibly their amps do female vocals. It’s why I went with a Musical Fidelity M6Si recently.

[@hazzy9079]

​@@shan-junlu8238Could you share your experience with the M6SI? How do you find the pace, rhythm, attack & timing of the amp? Does it engage/excites you with impact & drive to your music & speakers? Thank you in advance.

[@matytinman]

From a polish review [ The spectrum of harmonic distortions (Fig. 2) is also exciting... We see a strong second harmonic (- 57 dB), which can be considered another tube accent of the A1, the third one is also high (- 62 dB), above - 90 dB we have a fifth harmonic (- 80 dB). A1 has a life of its own. The advantage of the 8-ohm load is also visible in the form of lower THD+N distortions (Fig. 3); then they go below the level of 0.1% from 0.2 W, and at 4 Ω this is not possible in any power range. It is also worth paying attention to the unusual shape of the THD+N characteristics for a transistor amplifier, similar to tube amplifiers, which slowly increase from the minima at low powers.. ] I like much more the Sugden A21.

[@rotaks1]

Very educational and enjoyable episode. Thanks Harley!

[@PearlAcoustics]

Thank you!

[@petervirnuls7879]

I’ve had the original in the past. It was repaired three times, and had two further volume pots. I got tired of it, so I bought a Cyrus 2 /PSX, then Audiolab 8000C/P. Because I felt bad about selling it, I kept the A1. Some years later I connected it back up and loved the mellowness. I was ‘t that keen on it as a teenager, but as I’m now much older, it suits very well. I then tried the Krell KSA100 Mk2, and finally the FBP600. The class Asound is really different, and hard to describe - but you did a good job! The big Krell isn’t ideal in an energy crisis - can be almost 3kW when at louder volumes. Even on standby, it can be £2 per day

[@PearlAcoustics]

Dear Peter, thank you very much for your kind praise and also for sharing your back story. Very interesting

[@mjjm6220]

Well, this week I got my Burson Mono block amps and they work great with the Sibelius speakers. I couldn’t be happier!

[@PearlAcoustics]

That’s great to hear! I’ll add them to my list!

[@budgetaudiophilelife-long5461]

🤗 I HOPE YOU ARE DOING WELL,HARLEY…AND THANK YOU FOR SHARING YOUR EXPERIENCE 🧐 WITH US 💚💚💚

[@PearlAcoustics]

Hi, I am doing great thanks! Hope you are too. Enjoy the music. H.

[@budgetaudiophilelife-long5461]

THANKS 🤗

[@johntucker5994]

Harley, thank you for such a nuanced, intelligent review. When I was attending an all-male Catholic college-prep high school in the U.S., we immature students would often comically mimic our Dominican teachers (for better or worse). One popular phrase we mimicked was: "You are a gentleman and a scholar!" Well Harley I think that describes you perfectly! One other point: is Lovegrove really your last name? 🙂 One might wonder if Lovegrove is a pseudonym chosen by a person who wants to market oneself as a loving person whose personality and character is reminiscent of the peace and joy one experiences in nature. 😉 Brilliant! I am presently seriously thinking of changing my surname to Lovegrove. You have my sympathy for my poor attempt at comedy. I think very highly of you, and I am happy you are on KZbin presenting your audiophile opinions and experiences. You raise the bar. Happy Holidays!

[@PearlAcoustics]

Dear John, I am very touched and humbled by your generous and humorous comment! Indeed, Lovegrove is my real family name! 😉 so pleased you appreciate my presentations. My best wishes to you and your friends and family during this holiday season.

[@johntucker5994]

@@PearlAcoustics Thank you! And I knew/highly suspected Lovegrove was your real surname. Needless to say, I very much appreciate what you do!

[@johnmcdevitt9797]

I own it and I love it, my thoughts on the A1 are in alignment with Mr. Lovegrove. So what sounds great in hifi does not necessarily feel great! Kinda like popular tunes, the dull tunes are often more popular than the sharp tunes because emotion feels better than thought for many, I love my tunes both ways. Sometime fun, sometimes contemplative. For a relatively affordable secondary system designed for the fun factor feels, class-A power is an obvious consideration, the A1 delivers.

[@PearlAcoustics]

Thanks for your comment and contribution to the discussion.

[@crtgamer2355]

I listened on my monitor headphones, and at first I thought I preferred the warm tube like sound of the A1, but upon repeated listening, I realized how much wider and more 3 dimensional the Sugden sounded along with more detail. Since I have a hybrid system which comprises of a semi decent audio interface playing digital files through a vintage amp and speakers, I have to say I can't go without the detail of my interface any longer. I love the warmth of my amp and speakers but the interface just pushes it to another level and I think for that reason I would prefer the Sugden. If I wasn't spoilt by my audio interface's detail I would have most probably gone with the A1. I think combining vintage warmth with some modern detail is the perfect sweet spot.

[@PearlAcoustics]

That’s very interesting, thanks for sharing.

[@yippie6862]

I preferred the sound the Sugden here. It just sounded like the better amplifier to my ears. However, at about 50% less expensive, the MF A1 wasn't too far behind and would be the one to get if you're on a budget.

[@PearlAcoustics]

Thanks for your comment and contribution to the discussion

[@simongrove3276]

Nice review as always, completely agree with your comments about remotes.

[@PearlAcoustics]

Thanks! Much appreciated!

[@snarf4058]

I am demoing an A1 with ProAc D2R speakers. I really like the combo! Directly compared to my Elex-R, i get to about 11o clock on the volume which is about 84db average on my phone's sound meter. That is plenty enough for me. I listen to heavy metal and so tolerance with poorer recordings is a must, and A1 seems to play nice. I notice plenty of texture and weight to distorted guitars, and some real grit on the bass to well recorded albums. It's all very entertaining. Sugden A21 and maybe SE demo is up next, i can stretch the finances that far, but i need to mak sure they are worth the extra over the A1 as it really is very good!!!!

[@PearlAcoustics]

Thanks for sharing. Good luck with the demos!

[@rvbsoundfactory]

Great review! The Musical Fidelity is on my short list for sure.

[@PearlAcoustics]

Thanks.

[@rvbsoundfactory]

@@PearlAcoustics Sounds pretty amazing. your review is really selling the quality of this piece of gear. You're saying all the right things for me to go and audition this amplifier. Having said that, do you think this would be a good match for my now vintage Linn Katan speakers? Oh will the music Fidelity be Overkill. just a or nay or yay,, will suffice. Great detailed review..?

[@PearlAcoustics]

@@rvbsoundfactory in my opinion, either the MF A1 or the Sugden would work well with your loudspeakers. The MF A1 would not be over kill

[@rvbsoundfactory]

@@PearlAcoustics thank you, for the advice! I would like to keep my stereo system simple, clean, elegant. And most importantly not shouty. Hey look at me. Just get home on early Friday evening and chill for the weekend.

[@spill_the_beans365]

It does have features that look impressive and it does remind me of some of the class A class AB units of mine in the past. I sure thought they sounded great all those years ago. There are several new integrated amplifiers that have wonderful chip sets now that have impressed me with the warmth of those like your A1. SMSL A300 and its relations are very good and for under 200 dollars.

[@PearlAcoustics]

Thanks for your interesting comment. Under 200USD? Wow. Can you share some names?

[@administratormagmamin8397]

Great content, great comparison. Thank you. The designer of the original A1 is Pentagram, (Sir Kenneth Grange). It was an original design (agreed, it does look like the Armstrong). The great Tim de Paravicini only designed the circuit. He used a metal box to house the prototype.

[@administratormagmamin8397]

I just realized....we had a Sir and a Baron who put together the original A1!!!

[@PearlAcoustics]

Thank you for your very kind words. That’s very interesting! I am always impressed with the incredible knowledge that’s out there! (Forgive my ignorance but who was the Baron?)

[@administratormagmamin8397]

@@PearlAcoustics Baron Tim de Paravicini. Family title....

[@PearlAcoustics]

@@administratormagmamin8397 Ok thanks, I never knew that!

[@AlphaToker]

Agree on the little remote. It's perfect. Paired with the Chord Qutest, these are enjoyable sonics.

[@PearlAcoustics]

Thanks for your comment

[@marcopignone9386]

Not an owner of your speakers, but I did hear a pair at Capitol Audiofest a few years ago and they sounded beautiful. Many systems were quite harsh at the show, but yours and a handful of others stood out to me.

[@PearlAcoustics]

Thank you! Much appreciated

[@peterpixo]

I was so happy to learn that my SONY amp with this "cluttered" remote (but very nice layout) can control a CD player I bought second hand without one. And to have it in one is just a new freedom.

[@PearlAcoustics]

Great!

[@Stelios.Posantzis]

Very interesting and useful review this is. I think the last shots clearly show where your preferences lie! I have both amps (not the original versions - maybe second or third editions) but I only just realised I have never compared them! There's a couple of points I'd like to make that your video triggered in my mind. a) The technical side of things may or may not interest certain music listeners . To those that are interested, again, it may or may not reveal why certain elements of the sound character are what they are but that is a risky business because, even armed with a circuit diagram, the amp is still a black box essentially (e.g. the fact that A1 has a direct-coupled output rather than the capacitor-coupled output of the A21 should, on first reading, point to a more open sound with a more articulate, full bass - which is not the case as attested here) until one sits down and performs a series of inspections and electronic and acoustical measurements - a very labourious task! It can, however, reveal certain design deficiencies, e.g. in the original A1 suffered from a cramped interior, PSU filter capacitors whose voltage rating was the minimum necessary etc. Some of these deficiencies may or may not lead to failures - it all depends: on usage, storage, chance etc. Subsequent A1 versions addressed these deficiencies, I understand, which by now are well-known and thus no longer are. Certain elements of the design are necessary, however, for the listener to pay attention to: the fact that these amps are biased into class A means copious amounts of heat are radiated and thus these components should have ample of free space on all sides to allow ventilation. If placed in a stack, they should always be the last device on top and never be placed under other components as the heat emanated from them would increase the temperature of the components above them. Certainly nothing should ever be placed on top of the A1! b) The A1's design is iconic. In fact the whole series of amps produced by Musical Fidelity in the '80s is iconoclastic and were a fundamental factor in their success. Let's not forget that many listeners are all too happy to display their pride and joy and also derive pleasure from looking at it. The whole A1-styled series of components was a definite success in that department. In my view, the biggest mistake MF made was to abandon this design for decades in favour or other innovative designs. A classic design should always form an anchor in a product line-up as Sugden and other long established firms in the industry have successfully demonstrated. As far as young new owners are concerned: the novelty factor is a great attraction and the A1 design will keep having that advantage in the future as it did in the past so younger people will certainly love to have it. The only device that broke the A1 mould in my mind was the top-loader cd: although the use of valves was a nice touch, placing them upright so as to extrude from the top was a bad move. The line-up's design integrity should not have been broken and the cd ought to have been designed as a front loader (a rather difficult task at the time).

[@PearlAcoustics]

Thank you very much for your enlightening comment and its contribution to the topic.

[@Stelios.Posantzis]

My pleasure@@PearlAcoustics - I'm glad you liked it. I really enjoy your videos, as well as those of the British Audiophile. I find you both have a very relaxed and refreshing take on audio equipment reviewing.

[@PearlAcoustics]

@@Stelios.Posantzis Thank you. I am very honoured to be in his company.

[@overijsemuenster9665]

Nice and honest review. Congratulations.

[@PearlAcoustics]

Thank you!

[@cobar5342]

I love both companies but I have a soft spot for Sugden given the company's history and manufacturing methods

[@PearlAcoustics]

I think that’s very natural. We all form some kind of connection with certain product manufacturers. And sometimes on the flimsiest criteria (I am not saying that this is in your case), we can even find ourselves forgiving elements that we simply wouldn’t do for other brands. For me I am like that with MG cars!

[@darylprowell5857]

An amazing and honest review. Thank you so much please continue.

[@PearlAcoustics]

You’re very welcome

[@jawito5378]

Excellent reviews! Very helpful.

[@PearlAcoustics]

Thank you! 🙏

[@antoniopagliuca6249]

The A1 has a warmer, more organic sound compared to the Sigden A21. The A21 has quite a cool almost clinical tonal balance

[@AdiMaco]

I love music. I love audio gear. I follow many review-ers on YT, Tarun aka The British AudioPhile, Steve Gutenberg aka The Audiophiliac, Audiophilia, and a few others and I have to say that I really like the way you review. It is different. You are a bit different. I like a firm grip on the bass and a fast, controlled bass. I would have loved to hear your thoughts about the kind of base these amplifiers create or re-create with your speakers. On the other hand, to be brutally honest, I didn't know what to think, theoretically, about your speakers because of the low sensitivity. Yes, I like one driver, and one source point speaker like Sibelius, but in my mind, I have always thought that that driver must be high sensitivity and the cone must be paper. Anyway, I like your YT channel very much!

[@PearlAcoustics]

Hi, thanks for your very interesting comment. In short, I found the Sugden had a more detailed bass, and it can even be detected on the sound clips (just about). The Sibelius has extremely fast and very detailed bass, right down to 38Hz, in the right room and with a good quality amplifier. The sensitivity is not related to its frequency response. The secret is to keep everything as light as possible, so we have fewer winds on our voice coil which decreases sensitivity but increases dynamics. (I am over simplifying here). In the beginning of the Sibelius development we experimented with paper cones and even brought one to market. But the midrange was a bit too ‘shouty’ and the treble too harsh for my liking, + in listening tests, 90% of our audience preferred the driver we now use by a long way. I hope you get to hear a pair of Sibelius loudspeakers one day.

[@1999zrx1100]

Very informative video, I wonder if the A1 would start sounding better over time. I had the original A1 back in the 80’s, worked it hard for 20 years, regret selling it. It’s the reason why I’ve returned to the modest output of Class A after years of High Output McIntosh gear. Six months ago I found the last available Luxman 590axII at my local dealer. 30 watt output, the amplifier Power Consumption is 260-330 watts. Hard to find information on Class A used by the various manufacturers but your explanation on input versus output makes perfect sense. The Luxman is 10 times the price of the Musical Fidelity, clearly the Class A designation is used loosely. Cheers from Canada 🇨🇦

[@PearlAcoustics]

Thanks for your comment, happy end of year from Belgium

[@tommcmurdo6181]

I too had the original A1, paired with some Monitor Audio speakers, changed to an A100 and then pre-3A & MA50's into Epos 14's - that was a fabulous sounding system. Then swapped to all Linn/Aktiv as the MF stuff was not the most reliable and after 20+yrs, it's departing and Accuphase is incoming. It might well have been the Sugden (was planned), but local dealership changed and scuppered that (prefer to support local retailers even if choice is more limited). Accuphase is stunning so very happy with that....awaiting it's arrival as I write. Great video's, as always 👏👏👏

[@1999zrx1100]

I’m on same page by supporting local dealer, most dealers don’t carry both Accuphase and Luxman, mine just the Luxman, from my understanding both are like the McIntosh of Japan, long history & house hold name. It’s certainly my last amplifier. Enjoy the Accuphase, killer pieces. 😎

[@PearlAcoustics]

@@tommcmurdo6181 thanks Tom, very kind!

[@dab9742]

@1999zrx100 : The Luxman L-590AXII really does deliver 2x30 watts, while the Musical Fidelity delivers its first watts in class A, then switches to class A-B for speaker requirements. Just look at the difference in power consumption between these two devices, for proof ! 😉

[@frankgeeraerts6243]

Thank you for this very nice video...........comparing with many other reviewers ......I like your attitude the way I feel listening toi music... .............this amplifier is something akin to lok at a forest ratheer than the individul trees......a composition of flowers in harmony rather than having a magnifying glass on each flower....the brand of an appreciated parfume or fragrance instead of the different scents that compose it .

[@PearlAcoustics]

Thanks Frank! I love your additional analogies 👍

[@arte2arquiteto]

Two iconic integrated amplifiers! The A1 is special, in its own right, due to its history as being the first purist product by MF and designed by the late Tim de Paravicini. The SUGDEN, on the other hand, is a design that is more refined and for lack of a better word, more high-end. Something is haunting about the A1 both in design aesthetics and sound. It carries with it the eccentric qualities of its designer. If I weren't so snobby I'd say that the A1 would be a perfect fit for my ProAc Response 1SC's. The SUGDEN was lauded as a match made in heaven for the ProAc monitors but I wonder...

[@PearlAcoustics]

Thanks for your very valuable contribution to the topic. Personally, I think the Sugden A21SE would be the best match for your Proacs… it’s a bit more expensive but I feel it is way better.

[@albiepalbie5040]

I have the A1 matched with Quad Esl 57 No Bruckner or Headbangers so very good Beautiful vocals - Nick Drakes 3leaves left georgeous Guitars and Strings Sean Shibe s latest CD on Pentatone is Magic !

[@PearlAcoustics]

That’s a very interesting combination. Thanks for adding your experience to the discussion

[@violin-schwerin]

I very nearly went for the sugden, however the luxman sq-n150 really did it for me, it's my endgame amp

[@PearlAcoustics]

That’s wonderful to hear. It’s so nice when one finds the equipment they have been searching for.

[@violin-schwerin]

@@PearlAcoustics I hope to be able to audition the Sibelius next year

[@PearlAcoustics]

@@violin-schwerin would love to help you achieve that. Feel free to reach out to us via our website, I am sure one of the team can help you. Happy holidays.

[@dennis3779]

Very nice. Class A is where everebody should be interested in, it is as close to reality as it gets. But this review means that this A1 amp is probably not much better than the VMV A1 or Aegir or a tube amp as a Cayin, Willsenton or Unison Simply Italy. I am curious about the Rega IO and the new Arcam A series and their phono inputs though also against the TDAI1120 and A21 amps.

[@PearlAcoustics]

Thanks! Indeed, one can go to endless steps when comparing… at the end, we each need to find that one unit we can really enjoy and identify with. (Or maybe two)!

[@FrouzakisGeorge]

Totally audible some of differences even through KZbin. During the video I was thinking what if Arcam came out with the model I bought during my student years. The Alpha 5. I would definately like to hear it. What kind of improvements could they implement? I still have it as a second stereo, hooked one the same old tannoys, 609s, I bought to pair it with.

[@PearlAcoustics]

Thanks for your interesting comment

[@obscurazone]

The Braun Atelier A2 came out the year before in 1984, which I think was probably a heavy influence on the styling of the Musical Fidelity "A1" (see what they did there...) released in 1985. Mission's Cyrus one also came out in 84, and is certainly of the same aesthetic.

[@PearlAcoustics]

That’s very interesting indeed. 🙏

[@gaetancharbonneau3902]

I wonder how the Musical Fidelity would sound with less efficent speakers. Thanks for the detailed review in any case, always a joy to hear.

[@PearlAcoustics]

Thank you for your kind words. I am sure the A1 will be fine with less efficient loudspeakers. Ours are only 87dB at 1 watt. I know that Musical Fidelity pair the A1 with their LS3/5a’s and it drives them fantastically well. And those loudspeakers normally like very high powered amplifiers. The A1 has loads of gain, so I don’t see an issue.

[@gaetancharbonneau3902]

Very interesting, I am very curious now! All the best for the upcoming year A+@@PearlAcoustics

[@Exgol2005]

​@@PearlAcousticsA1 + LRS safe to try?

[@PearlAcoustics]

@@Exgol2005 oh, that’s a good question. I am really not sure. Sound characteristics wise ’yes’, probably a good match but technically I am not sure if the A1 is happy with low impedances? Hopefully someone will tell us.

[@frankcannon410]

Yes, I hope someone can advise. I have a pair of MMG’s I’d like to try with my (2008 model) A1.

[@kingtubby999]

Thanks Harley, great review as always. In answer to your question as for who is the amp for... I think a lot of the sales will be the "slightly" more mature crowd who owned it the first time and want to jump back 30+ years if only for a fleeting moment...(I tentatively raise my hand)... In all honesty could not tell the difference with the samples, which maybe my ears or listening via apple homepods....

[@PearlAcoustics]

Hi, thanks very much indeed for your kind words. To tell the difference, you really need to listen on high quality headphones through a good Dac or on very revealing loudspeakers. I didn’t hear a difference on KZbin at first but after listening in my Senheiser HD600 headphones, I heard it clearly. Best wishes, Harley

[@frankgeeraerts6243]

The sound sample is quite revealing even played back with the limitations of YT ...

[@PearlAcoustics]

Indeed, I was even surprised myself

[@yippie6862]

I agree.

[@mookie2637]

My Sugden A21SE manual states max power consumption as "300W"; on which basis it's a pretty purist Class A device. The other competitor brand here (and they are making some very, very good amps at the moment) are Rega. They are not pure Class A, but they are heavily biased that way, and get a little warm. My issue with the MF would be its reliability. Their failure rate used to be sky high ("I've got toasted A1s from floor to ceiling") as a distributor once infamously remarked. Final point ; the Sugdens use Philips RC5 remote control logic, so a lot of other remote handsets will work with them. I have an old Naim one, the Sugden one, and my favourite - the little one that comes with the Rega Brio-R.

[@PearlAcoustics]

Indeed, Rega amplifiers are also very interesting. I have an Aethos in the listening room, and I like it slot. (It’s also beautifully made).

[@markphillips1509]

@@PearlAcoustics Will you be doing a review of the Aethos that would be very interesting indeed.

[@PearlAcoustics]

@@markphillips1509 Hi, I do have one in the studio and I do like it very much… it’s a possibility. Thanks for the suggestion

[@davidatrakchi2707]

As usual, a very interesting review.

[@PearlAcoustics]

Thanks!

[@SignorZukini]

After your Sugden video a while back I asked for an A1 review and comparison in the comments. Thanks for delivering!

[@PearlAcoustics]

Indeed, you were the one who asked for this comparison! A couple of others suggested it to me too. I hope you found it detailed enough? Best wishes H.

[@SignorZukini]

@@PearlAcoustics Yes I enjoyed it very much and found it a very honest review so thank you. I feel a little bad that you had to buy an amp to review given it is not completely to your taste! Personally, I like detailed amps for short periods of intense critical listening but sometimes start to find them fatiguing after extended periods or while playing in the background. The A1 sounds like it would be engaging and a lot of fun to live with for a while. Harley, have you considered starting a Patreon page or forum of some sort to enable more direct contact with your viewers without the spammers and trolls?

[@PearlAcoustics]

@@SignorZukini Hi, thanks for your very kind words. And thanks too for your suggestion of Patreon’s. The biggest challenge for me is time. I don’t have enough already, and I only do this for ‘fun’.

[@user-ys4og2vv8k]

Great review, Harley.

[@PearlAcoustics]

Thanks! I am so pleased you enjoyed it.

[@jimsimon5706]

I've just found your channel, and find your comments honest and interesting. I have now stopped swapping gear as I am happy with the music I get (Garrard 301, Linn arm, Denon DL110, Kinshaw Perception, Arcam Alpha 5CD, Audio Note Soro, Tannoy Monitor Golds in my own 300 litre ported cabinets), but I find your process mirrors my own. I did go to a hi-fi show once and three moments stood out for me. One was a bit of real synergy in a room with a Copland CSA14 and a pair of Sonus Faber Minima Amators. They really worked well together - have you ever tried the CSA14? The next was a Gamut D200 amp which just seemed right though I can't remember the system... And, lastly, there was a lady singing with a guitar in the foyer, through a basic Allen and Heath desk into a pair of Turbosound Floodlights, and it was great!!! Absolutely lovely and dynamic and real-sounding. I was a live sound engineer myself, and my goal was always naturalistic sound, and I always felt it was possible for a good engineer to get basic gear to sound good, and very possible for good equipment to be utterly wasted on a bad engineer. Anyway, the foyer music was very well done. I think dynamics are almost the most important factor when getting music to he realistic, hence the Tannoys maybe? Anyway; Copland CSA14? Have you been there?

[@PearlAcoustics]

Hi, thanks for your Comment. I am sorry to say, I cannot remember ever hearing the Copeland CSA14. It looks interesting though.

[@christopherwright8179]

I remember asking if you would do a review of the MF A1 just after I had watched your Sugden A21 piece, and you let me know that you already had one on order. Well, thank you so much for this excellent comparison. At the end of the day, speaker matching is critical with this amp. I would avoid loudspeakers with a 4 ohm load, and stick with more sensitive designs like yours. I damaged my MF A120 back in the early 90’s driving 4 ohm KEF 104/2’s.

[@PearlAcoustics]

Thank you very much for your kind appreciation. I am glad I could deliver on your suggestion.

[@razzman2987]

The A1 is perfect for my 4 ohm Martin logan 40 i set . Why u suggest such things Because you had a bad experience ?

[@InCerTo_AntiFragile]

Great review as always. If you get a chance, I would be very happy to see your review of the Enleum Amp-23R. The Amp-23R has been evaluated as going very well with high sensitivity fullrange-ish speakers or high sensitivity two way speakers, and I am curious about its compatibility with Sibelius.😂

[@PearlAcoustics]

Thanks for you kind words and the tip. I have never heard of the amplifier you mention but will certainly look it up.

[@InCerTo_AntiFragile]

@@PearlAcoustics thank you for your answer😄

[@razisn]

Just a minor correction. TdP did not design the externals of this amp just the electronics (of which, I believe, only the power stages). A.M. procured the external design from an independent British design bureau.

[@PearlAcoustics]

Ah, now that’s interesting! Maybe the same company that designed the Armstrong?

[@razisn]

@@PearlAcoustics No clue. The design bureau was led by Kenneth Grange (now Sir Kenneth Grange), famous for his work on the Intercity 125 and other industrial design icons.

[@PearlAcoustics]

@@razisn that’s very interesting. Thank you very much for this additional information

[@borlach321]

I recently picked this up state-side. It replaced an older Arcam integrated. I actually feel the Musical Fidelity is a big step up for me. If I upgraded the caps on my unit do you think I would hear a difference? is it even worth it? To me, this is a toe-tapping piece of kit.

[@PearlAcoustics]

Personally, I would not change anything for at least the first ten years

[@hubert8694]

Audio Tuning and ProJect are Austrian, not German.

[@PearlAcoustics]

Oh goodness me. How stupid of me. Of course they are. Thanks for the correction. You know, I heard my recording back five times and I never picked up on that mistake.

[@frankgeeraerts6243]

This video is going to catch my interest harvey ............some memories remerge from listening to the original decades ago. Nice to state you will be listening and express what it does with music .........Class A with a Single driver .........right way to do it ! Very curious ...........I am ! 🤔🙂

[@PearlAcoustics]

😉

[@harrisedgar]

Wonderful..!!! (as usual). Thank you.

[@PearlAcoustics]

Thank you too! You’re very welcome

[@dmartyn3809]

A1 for me. Thanks.

[@PearlAcoustics]

You're welcome!

[@pietromoltani6923]

Off Topic here: Harley, if I don't get wrong, few years back I've read a review of the Sibelius and a Paper Cone version was mentioned. I was wondering what happened to it. Wasn't it successful as the GC or the SC shown here? Asking because I'm a huge fan of paper cone speakers. Thanks in advance for any reply

[@PearlAcoustics]

Hi, yes indeed, when we started out we had a paper cone version but it was not popular with our listening panels. 95% preferred our SG and CG. And in the end (because I did not like it much) I dropped it. The paper cone sounded too harsh, for my tastes… we still have a few paper cones in stock, but they do not have the customisation that our drivers have. Feel free to reach out via our website if you want more information

[@gotham61]

One small correction. Audio Tuning is based in Vienna Austria, not Germany.

[@PearlAcoustics]

Absolutely, a really stupid error of mine.

[@dab9742]

First of all, these two devices are in no way comparable: the Sugden delivers 23w in true class A, while the Musical Fidelity delivers its first watts in class A, then switches to class AB, like most Mosfets amplifiers. What's more, you have to look at the internal components: selected components, sorted and matched, cost a lot more than basic components. For me, there's no need to hesitate: if you can afford it, it's the Sugden ! 😉

[@PearlAcoustics]

Thanks got your contribution to the topic

[@jos5067]

I’m quite sure you will like a Gato (Danish) amplifier even more than a Sugden amplifier. Yamaha and Accuphase will be to your liking too, I think.

[@PearlAcoustics]

Hi, indeed I like many amplifiers. Gato I have only heard once before and that was some time ago and then, not in the best circumstances. I certainly like the look of them! Accuphase is a fantastic company but, again I have not heard many up close.

[@jos5067]

@@PearlAcoustics Yes, they are quite beautiful too, but for me even more important: no digital section. So I can buy the DAC, or streamer I want. Preferably a Chord Electronics DAC. Perhaps on the CES they will introduce a new line of DAC’s (after the Mojo2).

[@alialamri8525]

Thanks for the amazing review, Is there any chance to review pass lab HPA-1?

[@PearlAcoustics]

Thanks for your very kind appreciation. I am not much of a headphones man. I only use them for work, so I am not sure I am qualified to judge?

[@IncognitoChild]

For me what would be interesting is to compare today's A1 with the original A1 from 1985, bearing in mind that the original only cost £189 (budget entry level) and with inflation adjusted, would be equivalent to £589 today. So when you consider the new version is being made in the far East and it still costs €1,600 it's not necessarily going to attract the same person entering onto the first run of the ladder for hifi in 2024

[@PearlAcoustics]

Hi, good point. Thanks for your comment. I think your suggestion would make a very interesting comparison. I am not sure how inflation is calculated, when it comes to hifi but the one thing we know is that the original A1 was very unreliable and had a relatively short shelf life. Hopefully, this incarnation will prove to be much better.

[@IncognitoChild]

@@PearlAcoustics thank you for your reply 👍🙂. I have always admired Musical Fidelity products, unfortunately from afar, having never owned any of them 😭. They are what I considerto be a very quirky "English" design, but I have listened to them and liked their sound. I wonder what made the original product so unreliable. Was it cheap/poor components or poor design/ board layout which lead to heat soak problems and premature component failure. Maybe your viewers can share their experiences. Incidentally my very first amplifier was a Yamaha C85 & M85 pre/ power amp combination which sounded glorious but unfortunately, and surprisingly, It was the control amplifier that was constantly failing due to heat issues - components quite literally desoldering themselves from the board. 😭

[@PearlAcoustics]

@@IncognitoChild the unreliability was most of the things you mentioned. I happen to know that the volume potentiometers were particularly vulnerable to the heat

[@frankcannon410]

I just bought the 2008 model version of the A1. Almost no info online, I wonder what internal upgrades were done for that version?

[@James-mb5jr]

Excellent review as always!! How would you compare the MF A1 with the SMSL VMV A1, for a near field setup, using the LS3/5a 15ohm? Thank you.

[@PearlAcoustics]

Thanks! I think the VMVA1 would be more convenient (if placed on desktop) and plenty powerful enough. The A1 is quite big and gets hot! If you don’t need all the inputs, perhaps VMVA1 is better. Good headphone amp too

[@matytinman]

Rated power (1% THD+N, 1 kHz) [W] 8 Ω, 2x 25 Rated power (1% THD+N, 1 kHz) [W] 4 Ω, 2x 17 Rated power (1% THD+N, 1 kHz) [W] 4 Ω, 1x 17 Rated power (1% THD+N, 1 kHz) [W] 8 Ω, 1x 25 Sensitivity (for maximum power) [V] 1x 0.0.25/0.9 (DIRECT Mode) Signal/noise ratio (A-weighted filter, referred to 1W) [dB] 84/90 (DIRECT mode) Dynamics [dB] 98/104 (DIRECT Mode) Damping factor (referred to 4 Ω) 16

[@riccardodiiulio3012]

looking for a cheap class A ampli i saw this rewiev AND the smsl A1 one, standing at your words the smsl sounds better for half/quarter of the price. Honestly I dont' know nothin about eletronics but seems thath the smsl is a true single endend ampli and not an "hi bias" class A.

[@sylvio1980]

Would this amp make a good pairing with Harbeth P3Esr and Proac Tablette 10 ? Thanks ! Keep up the great work, really like your channel 👍

[@PearlAcoustics]

Thanks for you kind appreciation. I think the A1 would work very well with P3’s. But like all these things, you need to try it in your own home to be 100%!sure.

[@jameslast3192]

Great review. Thanks. 🙏

[@PearlAcoustics]

You’re welcome. Thanks for watching

[@mediascapes2011]

Happy Christmas Harley!

[@PearlAcoustics]

Thank you! Very kind.

[@xaviercarcopino5417]

Very nice video as usual but to be honest don’t you think the listening test at the end is quite a joke through KZbin?

[@PearlAcoustics]

Thanks very much for your kind appreciation. In the beginning, I was dead against these kind of online comparisons, for obvious reasons. That’s why I clearly say, it’s just for a bit of fun. Lots of people like them and that’s why I do it from time to time.

[@burakharley272]

The Sugden sounds good enough to be many people's last amplifier.

[@PearlAcoustics]

Indeed.

[@TasmanGuitarsAmps]

I don't know why they say for MF A1 that it is Class A amp. It is class AB.

[@PearlAcoustics]

Hi, thanks for your comment. As far as I am aware, and bearing in mind just how hot it runs at, I think you can safely see it as Class A. It runs permanently in class A, unless it is driven very hard, then it ‘slides’ into AB. I hope this helps?

[@GentielioGaming]

I played your video comparison of both amps on my Hyperionsound HPS-938 speakers, Moonriver 404 reference amp and a rather modest Metrum Quad DAC. I like the Jive and romantic sound of the MF A1 more for this recording. More musical i think? That is the conclusion of the sound through youtube on my setup.

[@PearlAcoustics]

Thanks for your feedback and contribution to the discussion.

[@papabear1417]

The Sugden for me. More engaging. The bass not boomy, incidental piano notes were heard. Sounds more cohesive with greater resolution

[@PearlAcoustics]

Thanks for sharing…

[@scruffy8861]

Harley, any additional thoughts if comparing the A1 to the newer A21SE?

[@PearlAcoustics]

Hi, absolutely. As I hinted during the presentation, the A21Se is a bit more open and detailed than the 21 and is my preferred choice for people whose budget allows. Hope that helps?

[@scruffy8861]

It does, budget does allow and i don't want the amp to hold back the capability of my speakers.@@PearlAcoustics

[@PearlAcoustics]

@@scruffy8861 just one more point. It could be worth listening to the Sugden SPA4 and then decide if it’s too much. The A21SE is somewhere in between the SPA4 and the 21. Good luck!

[@scruffy8861]

Harley, going forward with the A21SE, Your comments and others lead me to think a very nice piece of kit and this time around i want to do an integrated amp. @@PearlAcoustics

[@GavinHodgson]

Good work Pearl Acoustics

[@PearlAcoustics]

Thanks a lot!

[@johnersj7099]

Just discovered your channel. Well done. I did not realise the A1 was a beginner amp. My first was a Musical Fidelity A200DM apparently with dual mono amps inside. The volume control fell out and shorted it. It did run warm but seemed happy with by B&W805 Matrix speakers. Both bought in 1995. The B&Ws are still going strong. Could you suggest an amp or two to try to replace my dead MF amp? Would a Naim Uniti Atom work? It needs to be wife friendly. I believe in diminishing returns. My ears are 57 yo. I do enjoy guitar and vocals. Circa £1500. Regards Richard

[@PearlAcoustics]

Dear Richard, Thanks for your kind appreciation. I made a video on the Lyngdorf 1120, it’s a marvellous amplifier and I think would be perfect for your situation. Especially if you want to hook it up to you TV too. Enjoy the music, Harley Here’s a link: The Lyngdorf TDAI 1120: Why it deserves to be considered for a place in every HiFi system! kzbin.info/www/bejne/jYCVcnuZjt6ar8U

[@chrisclague5578]

I still own a A100, still sounds very nice very, detailed and always toe tapping lay good.

[@PearlAcoustics]

Thanks for sharing

[@kevinchew2594]

Halo , Sir sorry to bother you abit , i have small unsolve matter that is i have a old stereo audiolab 8000a rated at 8ohm 60watt perchann and my question is how do match the suitable speaker maybe is bookshelf or floorstand speaker ? kindly i have search one floorstand speaker MONITOR AUDIO BRONZE 5 rated at 6ohm 120watt perchann can this my audiolab amp drive this speaker ? tq

[@PearlAcoustics]

Hi, very sorry but it’s very difficult for me to comment on equipment I have no direct experience of. Hopefully the retailer of the loudspeakers can help you? Having said that, I see no reason why your amplifier would not work, but as I say, I have no detailed knowledge on your amplifier

[@erikszorg]

My MF memory was the same, it sound like an old tube radio like Edison's bulb. Lovely, but not for everyone ;)

[@PearlAcoustics]

😉

[@92trdman]

Should pair it with LS3/5A for comparison, A1 very traditional Class AB design with higher class A Bias...hard to recommend for overall music lover.

[@PearlAcoustics]

Musical Fidelity make their own LS3/5A loudspeaker now

[@92trdman]

​@@PearlAcousticsA1 very traditional Class AB design with higher class A Bias...hard to recommend for overall music lover.

[@jamesleung8679]

Is it powerful enough for LS3/5A ?

[@PearlAcoustics]

Absolutely. No problem at all

[@JaqUkto]

10:10 How does it sound

[@PearlAcoustics]

Hi thanks for your comment. I did my best to describe it, then at the end I play a sample of both amplifiers. I hope that answers your question?

[@JaqUkto]

@@PearlAcoustics sorry, this isn’t a question, but a time mark, where you start talking about sound.

[@razzman2987]

A1 is the best amp up on 3000 euros . Emotional lovely amplifier To listen is a virtue.. get it in youre face is to easy and very annoying in the long term

[@PearlAcoustics]

Thanks for your comment

[@larrylevan3378]

what is the point of these distortion boxes when nowadays we have modern state of the art amplification like hypex and purifi?

[@PearlAcoustics]

Hi, that’s an excellent question. Maybe you have seen my review on the Purify modules? There is something that sounds very intrinsically ’correct’ about these amplifiers that many people like, me included. Because something measures very well does not necessarily equate to sounding right or pleasant - strange though that may seem. Now, having said that we are developing our own Purify based amplifier that hopefully sets out to solve ‘the problem’

[@playbackvintagehifihunter9669]

Had one, but returned after 3 weeks 😔

[@r423sdex]

Good move.

[@crazyprayingmantis5596]

Why?

[@playbackvintagehifihunter9669]

@@crazyprayingmantis5596 After 2 hours of use, the heat caused the volume mechanism to become noisy (louder) when using the remote. It's developed a horrible rough grinding noise but also the operation wasn't smooth either. I could hear it from the other end of the room. Also there was a thump going through to the speakers during shut off. This isn't an isolated case, as I know other users who had the same issues. Sound is amazing for the price.. but therein lies the problem, it's definitely built to a budget. Just like its predecessor, I suspect parts quality has been sacrificed to keep the concept of "Good Value". Since this amplifier gets so hot in such a narrow profile, I wasn't confident of this amplifier being reliable in the long term - just like its predecessor..

[@jackfalco5351]

Yes, plan on returning mine. It sucks.

[@playbackvintagehifihunter9669]

@@jackfalco5351 what's happened to yours?

[@dungthoi1379]

I still own the original A1: an exquisite combination of weird design and irresponsible build.

[@PearlAcoustics]

😂👍

[@kevinchew2594]

Halo , sir can i know this sibelius floorstand speaker what specification ? does both class A amp drive it easily ? tq

[@PearlAcoustics]

Hi, thanks for your question. Yes, all kinds of amplifier can drive it but for more information, feel free to reach out to us via our website. Best wishes, H

[@peaceforever9231]

Musical Fidelity a1 sounds better .

[@PearlAcoustics]

😉👍

[@ckons89]

What's the best pairing for that low power class A amps ? I am thinking to pair MF A1 with Wharfedale EVO 4.3

[@PearlAcoustics]

That’s an impossible question for me to answer. It so much depends on what you expect from a loudspeaker and the room and the rest of the chain. Sorry I can’t offer more

[@johnwoodham6906]

So half the price of the sugden a21se but most of the sound ?

[@PearlAcoustics]

Hi John. Half the price of the Sugden A21 (the A21SE, is a 1000 EUR more expensive than the A21). So indeed, a lot cheaper. If you are buying on value for money, it can look obvious, but like choosing a car, there are so many other criteria at play. And if someone prefers the sound of one over another (and the difference is only subtle), then it is very likely they will go for the one they like the sound of best. The biggest problem is getting the opportunity first a really good sound audition, the best place being at home.

[@jackfalco5351]

This musical Fidelity integrated could not drive my Buchardt S 400 speakers

[@PearlAcoustics]

Are you sure?

[@Carl-yx1ww]

Sugden is better sounding

[@jazzabana]

My question is; how does it compare to smsl vmv a1 soundwise? Thank you.

[@PearlAcoustics]

That’s an interesting question, and in fact I was very curious too… so I made the comparison. The VMV A1, is a little more detailed, not much, and its bass is slightly better defined but it does not have the gain or ‘grunt’ of the A1. The A1 is really an amplifier that can drive in efficient speakers in a way the VMV A1, simply can’t. Hope that makes sense?

[@jazzabana]

@@PearlAcoustics Absolutely. I recently purchased vmv a1 and mixing and matching with speakers, cables and dacs. Just wondered. Thank you for your reply.

[@paulomontero12]

Guy is clearly biased towards the sugden amps?

[@PearlAcoustics]

Hi thanks for your comment. It may come over like that, but please let me assure you. When I listen and try out a new piece of equipment, it doesn’t matter what, or where it comes from, or who made it, I just want to it to wow me. I want it to be the piece of equipment I would want to keep for ever. The Musical Fidelity impressed me, especially for its price compared with the Sugden, and it looked better and had a nicer remote control with a Mute button. However, to my ears, it did not sound as detailed as the Sugden, especially in the bass, and its soundstage was a bit narrower. Some people might even prefer it. It’s a personal thing, to a certain extent.