Battle Of The Class D Titans: Fosi ZA3 Vs Aiyima A07 Max Sound Demo

[@VirtualHiFi]

Please LIKE and SUBSCRIBE 😄👍 For stunning revolutionary 3-way speakers visit - www.qualioaudio.com Need to get the Fosi ZA3 Amp - fosiaudioshop.com/virtualhifi (affiliate link, no additional cost to you and I get a small commission that will help grow the channel) Prefer the Aiyima A07 MAX - www.aiyima.com/?ref=virtualhifi (affiliate link, no additional cost to you and I get a small commission that will help grow the channel)

[@thelowprofile9767]

Hi, I just subscribed to your channel. I hope you can let me know how you are switching between amplifiers during your test. I will appreciate any response. Thank you.

[@oliverosrecki7421]

Good day! What do you think about Fossi devices? Another thing I wanted to ask you. Is it true that Fossi devices can match the PP quality of devices that cost $1000 and up? For example to compete with devices such as McIntosh, QUAD, Pioneer?

[@Clcar30]

an important concept is that of the preamp and in particular its gain and quality. I tested the A07 max on my arcam avr 550 then on my emotiva mc1. the Emotiva has more gain and the sound is more transparent and clear. In other words, the right combination changes the situation and the Aiyima/Emotiva result is stunning. certain that the break-in, in addition, will further improve listening... a revelation. So don't judge too quickly...

[@VirtualHiFi]

Thanks for sharing the info with us ;) I'm not using any special preamp but all DACs that I have have either build in pre or a high level outputs ;)

[@michaelwright1602]

I have the A07 mono setup, and the Fosi V3... Waiting on my ZA3 monos... 48v power supplies... I hear the same with the Aiyima's and the Fosi V3, identical findings here. The Fosi is more A/B, vs the more analytical A07, and neither have that Class D dryness with my preamp and speakers. The A07 in my system still had that A/B sound, and I am very impressed with both amps. They both have their own sound, or the way they translate the bits to music. The A07 is punchy, the V3 is a tad bit nicer in the midrange and top end. But not by much, not much at all. I could live with either in my system. Then the Sparkos, the midrange became very muddy and veiled in the V3. I have yet to install the Sparkos in the A07. Going to do that this weekend. I also purchased a Wolfson DAC, and want to try that with these units. Currently I am using a PS Audio Gaincell DAC/Preamp, which sounds fantastic when paired with my Zu DW6 Supreme speakers. For the money, with good gear and speakers, these stupid little amps will knock your socks off. I wish they made these without the volume knob, just a straight out amplifier, and a real sub output. They do that, they will be creating a shitstorm in the HiFi industry. Yes, they sound that good.

[@ccll-l8u]

Looks all good, I read in the forum that AIYIMA is getting ready to come out with a new A70. if it gets tested I would like to buy one.

[@jwinstonh1926]

Your conclusion is spot on. However, it’s difficult to choose one over the other as the differences vary depending on the genera of music you’re playing. The Fosi sometimes felt a bit constrained. Hard to choose one above the other.

[@MiguelAngelVelazquez]

I won't deny that the ZA3 looks way better. Point for Fosi on that aspect. There is another amp coming soon, the Aiyima A70, I think. It blows other TPA3255 with the balanced inputs. It was already measured on ASR. All this competition benefits us as customers. What a time to enjoy ultra affordable Hifi.

[@jayem1826]

asr. So what. Couldn't care less how it measures

[@MiguelAngelVelazquez]

@jayem1826 good for you. It makes your life much easier.

[@victorasanza1584]

Ayima A07 Max No deja de ser Muy Buen Competidor del Fosi Z3 con un Sonido muy Nitido en Frecuencias Medias. El Fosi Z3 da un Campo de sonido Mayor con mayor Bajos

[@buzzwordy9951]

I prefered the Za3 but I was very hard to tell why. The Fosi seemed a little richer in the midrange. Then I heard parts where the Ayima seemed better. Ohhhh this is a close one but for sure they are killer amps for the money. The 3255 chip with a good power supply is so sweet. I wrote this comment before reading your conclusion.

[@robertfiorellino6070]

I'm using two Aiyima A07 max amps to drive my KEF LS50 Metas. I'm also using a cheap Onkyo changer and the Denefrips Ares II DAC. The preamp is a 30 year old Forte F45. The sound is amazing

[@VirtualHiFi]

Thanks for sharing. Glad you enjoy the sound ;)

[@michaelgreene288]

Great videos, thank you! Please test the Aiyima A70 and let us know how it stacks up against the A07 MAX and the Fosi ZA3.

[@aeon7748]

Aiyima A07 Max sounds more clear but cold and anemic, while the ZA3 sounds more dynamic, warm and pleasant with decay and better soundstage, I now know understand why you said it sounds more "Analog", just enjoyment of music.

[@Clcar30]

I tested in stereo and mono mode and I didn't find much difference. Little extra power, this certainly because the excess power in mono mode is absorbed by the impedance divided by 2 and therefore requires... more power. Choosing a quality and powerful power supply seems to me to be a better solution. I ordered an aiyima 48v 10A Gan to compare with my 48v 5A but unfortunately received a 48v 5A! So I recommend one, hoping for the right one because the 5A is a bit tight for my 87db speakers!

[@VirtualHiFi]

Thanks for sharing your feedback.

[@VirtualHiFi]

Interesting about the 10a Gaan psu ;)

[@AusGanesh]

Thank you for the informative videos. I have listened to this and other comparisons multiple times. In my opinion you are a fan of vocal’s hence you like the pronounced vocal reproduction by Fosi ZA3 and Gryphon amps. But to my liking it is tad more than I like, during long listening sessions this vocal bump will lead to listening fatigue. On the other hand the Aiyima A07 and Dan Dagostino have more natural reproduction of vocal’s like tube amplifier (I still use tube pre and power), and also has better instrument separation and better sound stage. I still prefer the Eversolo amp for its refinements and compatibility with my Eversolo DMP A6 ME. Please note most of the tubes come from Russia and it is getting ridiculously expensive to replace tubes for power amps, hence the second system set up for time being. But I will use my Terminator 2 for DAC and Audio Research Ref6 line stage to add holographic tube flavour and let the Eversolo amp on mono setup to do the amplification.

[@tjeerdkruidhof5808]

Awesome! Thank you for this review! I was waiting for this! 😉👍

[@VirtualHiFi]

Glad it was helpful! 😁

[@sunhhx3928]

Wow,It's really hard to make a choice because they are all great, but I will consider my needs and my budget, I don't need to use XLRs, so the A07 MAX for under 100$ is my final choice!

[@Leo-u8b6e]

Thank you ,what a close decision to make . Both are so so good .

[@JohnnyReed-f3f]

Going to give the z3 a run as a channel in my 16 channel set up. My current power amp ran out of channels, and I've ran out of speakers, can't afford another 2000 power amp at the moment so the z3 and a pair of Kanto passive speakers, will do the trick for a experience with another added surround channel. Not going to even bother trying these on my fronts, seems a bit silly, but my curiosity is going to kill me if I don't try these Chinese amps out. Can't put down Chinese amps, I use tonewinner, and must say, the power amps are great ! And not many put down emotiva? I'm not about to blow 5000-10,000 on a power amp ! I'd much rather save for a Porsche at that price point.

[@dwaynepiper3261]

You have terrific taste in music selection. I am discovering much I have not heard before to my liking and this may be the best part of your channel. It is a tough choice between the ZA3 and A07 like taste testing two fine wines.

[@hrvojekant9415]

Great high quality sound with both amps. and exemplary samples contribute a lot to full enjoyment. ZA3 for a little bit more... pleased me

[@mikemullenix6956]

I cant tell them apart, also I don't hear any difference with an 48v 8amp power supply except that the amp runs warmer. Great selection of music.

[@Clcar30]

Do you have the GaN version for the power supply? A 48v 10A GaN version should arrive, it is offered with the Aiyima A70 which will be released and which you will surely test. Great video with an amazing sound ! Ajouter une réponse...

[@wyup]

It's curious, they don't offer GaN (or state compatible) with ZA3 but V3 instead. Buying it separate costs almost double than with V3.

[@rmzidann]

My suspicion is that the Sparkos op amps you are using is a better match for the Aiyima than the Fosi. I speak as an owner of fully decked out and upgraded Fosi ZA3 mono blocks owner. I have increased the filtering caps to 4870 uF per channel, upgraded the speaker binding posts, put in Class-A Op-Amps with 200 mA of maximum current capacity and upgraded the WIMA caps. In my set up it sounds amazing and I am a tube audiophile. I want to try the new Burson Audio V7 Classic op amps. I suspect it will go well my Fosi amps.

[@tonym8358]

The best opamp for Aiyima07 Max is Muses02 rather than Sparkos ss3602

[@petko9133]

​@@tonym8358explain please

[@phillipmorris9847]

You are awsome, your sound demos are the best, your speakers sound amazing, Love the content, thank very much for sharing

[@RAMIRO61FERNANDES]

Excelent I agree! The sound was amazing, and there is any difference with Griffon or D,Agostino????????

[@richh650]

Using the same op amps and TI 3255 amp chips, these amps should sound almost completely identical if using the same sized DC power supply. Nice sound clips sir!

[@hrvojekant9415]

agree !

[@stefanweilhartner4415]

don't underestimate the output filter!!!! core inductors are expensive and have a saturation that kicks in gradually at a certain power level. there is not a hard limit regarding their magnetic saturation. that means if one wants to avoid even low levels of saturation the inductor needs to be a bigger more expensive one that is rated for more power and has a lower inner resistance at 0Hz. don't forget, the inductors are probably the most expensive parts in the whole amp. (except after market discrete opamps). texas instruments recommends the real high quality inductors from coilcraft and i found some good ones from würth too. but so far, from what i saw from pictures from fosi and aiyima, they use a smaller cheaper one, maybe a chinese brand, i don't know. this could be one reason why one amp sounds more analog than the other. the same goes for the capacitors in that filter stage. they need to have low esr in high frequencies to get rid of the switching ripple together with the inductors. one would say that he does not care because the speakers do not react to switching frequencies around 300kHz. but actually that is not the case. there can be parts in the passive speaker that could pick up that high frequency and produce some intermodulation distortion that can be mirrored down to the audible part of the spectrum. like binding posts that have ferromagnetic materials in it and start to vibrate at the switching frequency and modulating the audible signal (intermodulation distortion) and create kind of hiss when there should be clean frequencies coming out of the tweeter. regarding the power supply: for comparison it should be an identical power supply. and this is also a point of optimization. these power supplies come with a certain switching noise as well. they are never perfect. that means, an additional two stage L-C filter could deliver a better performance and also a bit more of an analog sound. if you can hear a big difference in a single amp stereo and a dual mono amp setup, then you see/hear, that the power supply is weak and the bad channel separation is a consequence of it.

[@stefanweilhartner4415]

can you please open them and compare the parts in the output filter stage. the quality and size of the inductors and foil capacitors can make a huge difference when it comes to an analog or digital sound. smaller coils (if made from the same material) can have a lower saturation threshold. that means the saturation level starts at lower power and that might give you the unpleasant 'digital' sound. beside that i am positively surprised about the better dynamic and more detailed sound of the aiyima. could be a better power supply also.

[@luisdimarco5102]

Thanks for the videos. They are very interesting. You should give a try to the Nuprime Evolution STA.

[@nobody1841]

I have the Aiyima A-07 Max w T7 preamp. I changed the tubes to 1968 GE 5670 5 star RED which immediately seemed to tighten the bass and clarify the upper mids in a wonderful slightly agressive way. Before the tube upgrade I was contemplating an opamp upgrade but now I don't think I will do that. Im very happy. My last system was in early 2000's - Krell + MartinLogan.

[@dwaynepiper3261]

They are very similar using the same chip so I suspect the slightly different sonic characteristic might be due to input/ouput sensitivity and impedance differences which I don't see in their specs.

[@VirtualHiFi]

The application matters a lot. Components and even binding posts everything matter in the final sound character ;)

[@D1N02]

I prefer the slightly warmer presentation with more immersive bottom end of the Fosi, despite the airiness and wider sounding soundstage of the Aiyiama. For this kind of music the Fosi was usually better. I see you have managed to put the Staccato into the Fosi, I think it would probably be better in the Aiyima than Sparkos, because it is slightly more analog opamp than the Sparkos.

[@VirtualHiFi]

if I said staccato there is a mistake both have sparkos ;)

[@D1N02]

@@VirtualHiFiow Ok, it is also in you description ;) AMP: FOSI ZA3 + Staccato

[@VirtualHiFi]

Sorry I have to change it though ;) I had staccatos for so long that it's in my head

[@tonym8358]

Aiyima a07 max sounds better with Muses02 than sparkos ss3602 and there is another dual opamp than sounds better than Muses02 but hard to find

[@odei59]

Hi! You are doing very helpful work.I WILL try myself with Fosi za3 in mono dual mode but my big concern is quiescent and LOW THD so I ‘d rather roll with TI OPA1611-2 first before any other, and You Also could try it for more fun.

[@VirtualHiFi]

Thanks for sharing. Please let me know how it worked out. I'll do Opamps wars soon thesting multiple opamps and we will see.

[@siakhooneng3394]

Tqvm. From your details review I finally choose Aiyima 07 Max n play in mono driving my Linton n Topping D 70 dac as dac n preamp. Surprisingly beyond description it's work wonderful. Can listen hours n hours. I already put my Yamaha amp into hibernation. Friends out there give try n wouldn't regret I promised. Tqvm again ti's youtube.

[@threengcircus]

Consider doing an A/B comparison using the same tracks . You have good quality mics you're recording with!

[@tonym8358]

I like the Aiyima07 Max sound more wide and extended in Trumpet and Piano more like the Real instrument. I have tried de Fosi V3 and 07 Max sound much better with Muses02 than sparkos ss3602. Also, there is another scarce opamp that sounds better than Muses02.

[@donnywidodo8874]

What is the other opamp called?

[@tofffsymagic1099]

I'curious how the Aiyima A07 MAX sound with Muses05, I use discrete Akliam LC5 opamps and I'm very happy

[@tonym8358]

@@tofffsymagic1099 I have that opamp....Muses02 is better.

[@blownouttransmission5832]

thanks for making this video. i agree with your analysis . i have tried the amps with my easy load art stiletto 6 but also with more reactive speakers and can say now, these amps hate reactive loads . i have no way of lab testing them but just using my ears , both amps become shouty and confused sounding with some speakers , especially if they go from below 4 ohms to over 8 ohms several times across their impedance curve . just reading the comments on this video we can see some folks are not enjoying these amps and i will suggest their speakers are the root cause of the amps behaving strangely ,but as said , i have no test data to back this up other than my ears . worth pointing out that valve amplifiers can also exhibit this behaviour . thanks again for all the hard work ,, your videos are the most enlightening demonstration i found on the net.

[@SERKAN_HOT34]

I really congratulate you, there are many Fosi ZA3 Vs Aiyima A07 Max review videos on KZbin, but none of them tell their real experiences, good and bad, like you. I was personally thinking of buying 2 Fosi ZA3 48 volt adapters with a choice, but I'm about to give up now, my Monitor Audio I'm not sure it will pair well with the Silver 100 (7G) speaker.

[@michaelwright1602]

I have to agree with your assessment. These are not 300w or 600w amplifiers, more like around 70w. Marketing BS in my book for the gullible, as commonsense says that these are not going to get anywhere near the advertised output. But! With the right gear, these little amps punch way way way above their price point. A PS Audio DAC/Preamp along with a pair of Zu DW6 Supreme speakers, 12 Ohm 95 dB, and these amps are kicking some serious tail.

[@SERKAN_HOT34]

@@michaelwright1602 Thank you very much I am grateful for the valuable information, I just came on gas and ordered 2 pcs from amazon with Fosi Audio ZA3 and 48 volt adapter I hope they will make me happy.

[@jayem1826]

Wish you would play some ECM recordings or Audioquest. Try Manu Katchè. The timber of his drums sounds very real

[@VirtualHiFi]

Sorry I only can play music I have rights to use .

[@matytinman]

Thanks to the 4K / AAC 192 kbps video and the excellent recording it is very easy to detect the differences. Fosi ZA3 mono offers a more realistic, euphonious, engaging sound. Aiyima 07 MAX mono, on the other hand, has a sterile sound, more detailed and open, typical of the vast majority of class D. BUT BUT BUT 👉13:50 - Air on the G String - Johannes Bornlof A DISASTER, both of them with that recording. These CHEAP IMPLEMENTATIONS of the TPA3255 without FPPB are for maximum operation at 5 watts, or even less. As soon as the power increases, the sound deteriorates (and the measurements too). What I am saying in my X/Twitter threads regarding your reviews is confirmed: appropriate for sensitive loudspeakers, 89 dB / 4 Ohms (like your Qualio IQ) if commercial music with DR < or 12 dB. Tracks with 15 dB or more.

[@JorgeNovais]

So, if I decide to put aside my Cyrus IIIi amplifier and Rotel RB1070 monoblocks, will I be better served with a Fosi ZA3 Amp?

[@VirtualHiFi]

That depends what better means to me you. If you like ultra speedy precise dynamic yet still rich but never anaemic and always lifelike in your face punchy sound than the Fosi or aiyima are a great things to test ;)

[@9XThunder]

I also test both, i like the fosi much more then the aiyima, much more natural. I am alsoba tube man had everything from audio note, but now playing with the fosi's and a e6 preamp verry cheap but both verry good.

[@VirtualHiFi]

Thanks for sharing. Yes I also lean for the Fosi for most systems. The Aiyima will add a sheen to very detail lacking systems. For most systems Fosi will be great 😃

[@34332]

Both are very satisfying, however, the ZA3s have my preference for being more dynamic, a better defined midrange and voices more true, where I found the Aiyima slightly flat(ter) or less engaging. Amazing amps. Last but not least, thanks VH 🙏

[@Nunorsc1]

I see you have been using holo may for a while, will you be making a video with sound comparison against other dacs?

[@VirtualHiFi]

Yes I already recorded it against Weiss and Holo Spring L2 and yes the May is stunning ;)

[@Archibald787]

I would prefer a Fosi sound but it subjective. For sure it's better to listen on real setup

[@SonicJourneys-lo1rk]

I will share my experience with A07Max. I use a single unit plus nobsound tube for mids and highs. My speakers are similar to yours in concept, but i have a planar instead of AMT and a bit smaller woofer, however in 100% plywood cabinet built like a german tank. This system even without a DAC beats the hell out of ALL models i've heard in audio stores, incl Focals for $25k.,sonus fabers, Dalis, etc. with 20x more expensive amps. Maybe because my system is active crossover, without capacitors? hornlike dynamics with OB space and bass *ALMOST* like Wilsons

[@VirtualHiFi]

Thanks for sharing. Yes those ams are amazing. Powerful great sounding and cheap. Stunning option for all active speakers so Jo wonder you are extremely happy 😁 congrats on your system 🎉🎉🎉

[@SonicJourneys-lo1rk]

@@VirtualHiFi i wonder what will happen if someone will combine 1. Your speakers (or mine) 2) REL sub powered by these little amps , 3) high end OTL amp for mids and highs , 4) high end dac / Studer tape deck. Any guesses? In other words , i think $ is often wasted to class A amps below 400hz and heroic cabinets for mids/highs. Best examples magico, faber, b&w

[@t0nyxgq]

Wow, your recording of your speakers is very clear. Sounds like the actual recorded file. Even so... I'm hearing very minor differences. But I'm sure hearing it live will show the differences much better.

[@armurthy7799]

Perfect Differentiation By You Great

[@joeroot48]

I might have missed this, but were you using the balanced inputs from a balanced source when testing the ZA3? I ask because all of the shortcomings of the ZA3 that you mentioned go away when going balanced instead of single-ended.

[@decosse01]

What would your thoughts be on utilizing either (or neither!) of these to drive a 250W 12" subwoofer? I have a powered sub with a failed amplifier, don't want to spend a ton of money on it, so it's either a replacement plate-style amp (which involves modification of the enclosure) or simply plugging one of these in. The pre-amp is all handled by the AV Receiver.

[@VirtualHiFi]

It should do ok, but it all depends on the driver you have in the sub if it's 4 ohms it's fine but some subs can be 2 ohms or lower and for them you will have better results with dedicated sub Amps that can survive such load.

[@francisdelacruz6439]

Hard to judge YT sq but sound is nice. Cheers.

[@logotrikes]

They sound so similar to me, why not buy the AO7 and fit the Sparko's. Still be in front, only two Sparko's needed for mono in either amp...

[@VirtualHiFi]

Yes sound is very good for both, but if you want the XLR the fosi is King, and yes the XLR is the way to go ;)

[@logotrikes]

@@VirtualHiFi Cheers for the feedback. Agreed, the ZA3 is preferable..

[@tbsschiro1393]

Great review! Thank you!

[@andreask2288]

I use 2x Aiyima A07max and my Accuphase Amp can relax now...

[@Jil8840]

Great test thanks. Aiyima sounds better, more open more transparent and more live. The problem that i have with these Chinese amps is reliability, I don't trust them, and the fact that they don't have many inputs and usability!!!!! I think sone of them don't even have a remote control.

[@damjov]

Hi guys, can i drive b&w 683 s1 with one of these amps? i need it attached to my tv via hdmi arc dac for listening youtube music, watching tv, movies and netflix. thanks :)

[@NormcoreGreg]

I'm also using ZA3s as monoblocs. However, I'm not as impressed as you seem to be ;) The thing that bothers me most is that the amps produce audible hiss / white noise, even though my speakers (Wharfedale Lintons) are not very sensitive. It goes away when I turn the volume down to about 6 o'clock on the amp, but since there is no scale around the volume knob, I am not able to precisely level both channels - the only way to do it is to crank the volume to the max. As far as I understand, this is also the only way to utilize the full power of the amp. Do you have any remedy for that? :)

[@sidethan]

you obviously need a preamplifier when running monoblocks for accurate volume matching, it's common sense.

[@NormcoreGreg]

@@sidethan of course the amps are connected to the preamp. in my case via XLR cables.

[@BoolixDlike]

@@NormcoreGreg what kind of preamp are You using? I am also using za3s as monoblocks and searching for good matching preamp for them.

[@NormcoreGreg]

@@BoolixDlike , I'm using Rotel RC-1572 MKII

[@BoolixDlike]

@@NormcoreGreg and what impressions about this pre? is it enhancing sound noticeably? I am currently using pre inside cambridge cxn streamer and I don't think that's a proper approach ;)

[@tom6363]

I bought the Fosi ZA3 and the trigger port is so loose the 3.5mm cable won't stay in.

[@VirtualHiFi]

Sorry to hear that.

[@Gilliboy82]

Can these amps really beat my Hegel h95 class a/b amp? I use the Hegel in combination with a little dot 1+ tube amp with good tubes and a sparkos ss3602 opamp. I use Fyne Audio f501 speakers. I use a chord Mojo 2 as external dac. Planning to buy muses 02 opamp also because like them the most from your opamp sound demo.

[@bienvu5677]

My amp Aiyima A07 max gets so hot every time I use it, even if at low volume level. I dont know if it is normal, please tell me bro. Thank you

[@kattarhindu451]

Many thanks for this comparison video, had requested before 😊

[@contragica8609]

Hello, considering that this model from Fosi ZA3 can only drive bookshelf speakers, how did you make the connections to use floor speakers. Thank you.

[@VirtualHiFi]

If Someone told you those are toy amps they were wrong. There are normal speakers outputs and they can drive very hard to drive speakers :)

[@contragica8609]

All the videos on youtube with these amplifiers are logged to bookshelf speakers, they wouldn't have it any other way since they are powered by a laptop source

[@InternetExplorer-s9g]

@@contragica8609 48v 5A from a laptop 😆

[@박정식-i8f]

오 ! 한국 노래두 나오는군요~

[@maxcasci7432]

Hi, can you please describe the exact code of the Sparkos operational amplifier and where did you purchase it? Thank you

[@VirtualHiFi]

those are sparkoslabs.com/product/dual-discrete-op-amp-ss3602/ you can get them form their store directly or find elsewhere. I know you can also get them in the Fosi store if you want to get the Fosi.

[@maxcasci7432]

@@VirtualHiFi thank you

[@tikblang1]

If you have two A07 Max AiyimA configured as two monos, how many Sparkos you need?

[@LoftyVisions]

Fosi ZA3 by a mile for mid range and separation. The A07s sound a bit muddy and closed-in in comparison. I have the same ZA3 setup so thanks for the video. No buyers remorse here 👍

[@VirtualHiFi]

Thanks for sharing. Yes it is the Class D revolution. If I were never able to improve the amp over the ZA3 on the deserted island I'd be happy fella ;)

[@tofffsymagic1099]

Listening to your excellent audio samples and reviews i've decided to buy two A07 MAX (i prefer the natural sounding of the human voices of this one over the "muddiness" as you said in your conclusion concerning the ZA3) by curiosity and mainly to lower the electric consumption of my audio system, bought two for 140 bucks with 48v power supply, what can I say? WOW it buried deep everything I owned before, Marantz, Atoll, straight out of the box and many other amps even before i change the opamps. Night and day with other D class amps I've tried in the past. I use a KHOZMO passive preamp, pure silver litz handmade interconnects, Proac Studio 140 and Audirvana on a fanless mini-pc with Audio-gd Dac

[@VirtualHiFi]

Thank you for sharing that with me and the community. That is exactly what I experience here. When I visit customers here in Poland basically everybody end up buying either Aiyima or Fosi ;) Glad that you like it and can enjoy the music at a different level ;)

[@tofffsymagic1099]

@VirtualHiFi Thank you for taking the trouble to do things so well! I can't wait to listen to your opamps war 😁

[@tubeverse911]

How much RMS subwoofer can i use with this. I'll use denon AVR 1800h sub pre out

[@SERKAN_HOT34]

Fosi ZA3 vs Aiyima A07 Max, which one is superior in mono and stereo mode? And which one would you recommend? Unfortunately, since I do not have the chance to test these devices, I will choose one of the two devices based on the comments. That's why your comments are very important.

[@D1N02]

Or you could wait for the Fosi v3 Mono. (But that will give you the problem what pre-amp to use)

[@SERKAN_HOT34]

@@D1N02 i'm about to give up, I'm so indecisive.

[@VirtualHiFi]

What's your system and what do you expect from the sound ? What kind of music do you listen to ?

[@SERKAN_HOT34]

@@VirtualHiFi unfortunately, I don't have a professional high-end music system for hifi music, instead the system I use is a harman kardon Avr 265 amplifier, EverSolo DMP-A6 Streamer dac, Douk Audio Pro T8. Monitor Audio Silver 100 7G this is the system I use. One of my close friends has a primaluna prolog 2-lamp amplifier. this is a sound change, it's very realistic and natural,this is the sound quality I'm looking for, the music styles I like are Blues, Rock, Pop, Rap.

[@albe1796]

@@SERKAN_HOT34 Lol, I just installed the super cheap Douk Audio Pro T8 between my mono za3's and Topping E50 and am pleasantly surprise how great it sounds ;)

[@renanaugustosantos7903]

What sparkos op amp??????? this is ??? Thanks

[@crate718]

I own Geshelli dac with sparkos in the xlr. would be good enough not to upgrade the ZA3 op amp?

[@VirtualHiFi]

That all depends. Upgraded opamps give a big advantage, but don't hurry it if you feel ok with your system. Just listen to the music and enjoy ;)

[@crate718]

@@VirtualHiFi Thank you for the advice

[@alberto3028]

I think the ZA3 is faster, more transients. Do you think it could be a good upgrade from a typical class A/B amp like Marantz PM6006?

[@VirtualHiFi]

Yes. I believe all those 1000-3000$ Marantz Denona Onkios and other mainstream audiophile brands will be left behind

[@34332]

When you look at the specs (power), the Marantz isn't up to par vs the ZA3's. However, it also comes down on roomsize and type of speakers (sensitivity). Btw, you don't have to play loud to benefit from more power. I was kinda shocked when the ZA3 outperformed (by far) my beloved Audiolab 6000a in every area.

[@blownouttransmission5832]

over the last 3 years i have had a cyrus ONE , audiolab 8000 , Marantz pm6006 and c368 , the audiolab had the most delightful midrange performance , but fell on its face in the low frequencies . with my art speakers the za3 and 07 max both take the prize , but be really careful with speaker matching , they hate the LS3/5a 15 ohm due to the lumpy impedance curve , if possible , look up the impedance curve of the speaker you will use , if the curve is whipping around and lumpy , i would suggest you look elsewhere . 😘

[@Rgan2362]

​@@34332 Sir, I am planning to buy Fosi ZA3. Can I purchase Fosi or Ayima 48v 5 amp forx LCR passive spirit for my Cinema 50

[@Rgan2362]

Sir, i am in India . I have watched all yr for Class D amplifier videos. I am planning to buy Fosi ZA3 48v. Can I purchase Fosi or Ayima 48v 5 amp for my LCR passive spirit for my Cinema 50

[@Clcar30]

I insist but the upgrade of the op-amp is important (plebiscite of Sparkos) but the power supply is essential, also important on this type of amplifier. No comments or tests on the subject!? I have difficulties to understand …

[@VirtualHiFi]

Yes I am experimenting with linear power supply, but the ones 48v 5a Fosi are good to start with for sure.

[@informedchoice2249]

What is a Sparkos Opamp was my abiding question.

[@VirtualHiFi]

They are ss3602 Opamps made by Sparkos company

[@informedchoice2249]

@@VirtualHiFi Thanks, I found another one of your vids (iirr) where you explain the process. I assume they are just plugs and not soldered? And thanks for your help :)

[@user-mvgo]

Fosi ZA3!!!

[@VirtualHiFi]

Thanks for your vote ;)

[@srpathlabs788]

Great vdo....

[@wric01]

ZA3 is a tinkerl upgrade dream. More bang for the buck than any amps. In short, za3 neutral in short, a07 more bass and more v curve.

[@tacofortgens3471]

Za3 trumpet sounds more honky, the a07 max more natural

[@dark4o90]

You're getting used to what you have. I have a07 pro with Polk Audio s20e on my pc and recently connected a07 max with Smsl SU-1 and Odroid N2 with Volumio on my Polk Audio s60e towers and they both sound amazing to my ears. Not sure if buying another a07 max would do any difference for me as I'm not even listening loud music

[@VirtualHiFi]

Thanks for sharing. If you ever feel the need for a little bit more performance and breath in the sound go get the second Aiyima but if you are happy with it just listen to the music and enjoy ;)

[@tonym8358]

I my Aiyima 07Max sounds better than Aiyima Pro and Fosi V3, so yes, 07 Max is an improvement over, and Muses02 opamp is the opamp that sounds best

[@csszabi8779]

They can be good with a tube preamplifier.

[@VirtualHiFi]

For sure that is a great option ;)

[@albe1796]

@csszabi8779 Yes..but which one? I'm thing Freya.

[@halrichard1969]

I really cannot tell one tone of difference between the two.

[@VirtualHiFi]

Did you use decent headphones?

[@andreask2288]

Unterschiede sind hier wohl eher optischer Art, da die Technik dieselbe ist nur unterschiedlich verpackt. Ich bin für Aiyima A07max...❤❤

[@mariodrv]

Hey! You made this video 6 months ago and I would really like to have the playlist you were playing in it: "Lampizator Amber 4 Or Baltic 4 - Which DAC Sounds Better To You?" kzbin.info/www/bejne/b6XJc5WjoZt4qbs

[@humanitech]

Great review as always... I'm sure if you mentioned it or not ..but which amp gave the best soundastage depth? As although soundstage width is great and important ...for me it's also the 3d sonic depth that also makes things special. Thx

[@TheKkomp]

Я имел несколько усилителей класса D, на разных чипах. Вроде все нормально, играют хорошо. Но всякий раз, включая свой винтажный Victor ja-s9 1973 года, удивляюсь на сколько богаче и объемнее он выдает звук, чем эти бездушные усилители из Китая

[@VirtualHiFi]

Thanks for sharing. That might be the case. Class d is all about energy liveliness and punch 👊 so indeed vintage amps can have more sweetness to them.

[@outolempinimi5165]

If you would want to have a real and honest comparison test you should do a proper blind test where you let the audience guess which one is better or which amp is which and reveal the answers/results in an update video. I bet in a proper blind test absolutely no one could tall any difference between them. Same goes with rolling the Op-amps.

[@tacofortgens3471]

Ayima for the win tbh, The FOSI sounds honky. And those arent the stock, you upgraded the opamps... 🤦‍♂️. Not really a fair review..

[@bradleyclosson5042]

The fosi is a ltlle squishy with the compression.

[@RafaelZama]

class D + fake baffle speakers are very good to make noise, but never ever to listen to music ... if you do you will get crazy and never recover

[@sc0or]

Aiyima misses a transparency no mater which opamp is used. Everything is messed up. There is no air between instruments. Just a cheap boom box. Fosi is a bit better in this sense.

[@crazyprayingmantis5596]

A proper sub out with low pass filter, parametric eq and a remote and these things will sell like hotcakes. Until then its a pass from me.

[@silkhead44]

SMSL A300 for the win

[@Nightjar726]

If you want a REAL review , look at Erin’s review on this with measurements. Not just adjectives. I mean come on. This is 2024.

[@1957CRAZYDJ]

These review means nothing. It can be just music downloaded to youtube and not be the real music from the amp. 2nd thing, if coming from the amp, you should make your test with one amp in stereo. That would make a heck of a difference. Specs from Chinese are non-sense. How can you get 600 watts from 36 Volts power supply when in theory, it can achieve only 216 watts ?

[@alberto3028]

If it were just an audio from a single amplifier with nothing else, yes, it wouldn't make any sense. But the test compares two different sources, and considering it's a recording played back on your equipment and it's compressed, a comparison between them can indeed be made; it's the brain's capability. If you're unable to distinguish, I invite you to open your mind and train your ear a bit, but certainly coming here to say that it's useless serves no purpose at all!

[@josesoares1931]

Aiyima 70euros.Fosi za3 150 euros. So....

[@VirtualHiFi]

Yes budget wise the aiyima is cheaper. Those Amosa being so cheap I'd consider getting the best sounding for you one ;)

[@C4nnonF0dder]

These cheap amps are good value but stop lying to people that they can match multi thousand euro/dollar amps as this is just false.

[@VirtualHiFi]

in dual mono mode with upgraded opamps they can be final amps if the rest of the components are well matched. I prefer the dual mono fosi over my naim supernait 3 and it cost 5k$. I heard systems where aiyima a07 crashed 30k$. so are those the best amps in the world probably not. are the the best value in the world probably yes. but when I hear the 30k$ amp and switch to Fosi and it's just a matter of taste and one is just better in other things and there is no clear winner, I'd rather keep the fosin and spend the money on the Dac, cables, streamer, Speakers etc.

[@RoseLove1412]

How can people not see through this? He has an affiliate link in the description. He clearly is just trying to make a quick buck promoting this chinese brand. This clearlyis the issue with youtube review game. 😂

[@9XThunder]

I have northing to do with fosi, but also have it in ny setup, its realy good, and inhave alot of audio in the past 40 years ! Incl audio note, ml, but this two fosi monos give me all i want, its a bargain !!!​@@RoseLove1412

[@VirtualHiFi]

Oh no !!! you figured it out 😉 Yes I just bought my new Lambo by promoting Fosi, Aiyima and a few other cheap brands. Because 4-8% of the affiliate commission is why I started this channel. So yes 10$ from the sale of Fosi amp is my master plan and Iwork for over an year now basically everyday on this channel so that I can collect 120$ every month from selling small amps to all who are willing to believe that there might be breakthrough products that one don't need to spend a fortune on 😎 I even spent 30k$ on Gryphon Diablo 333 that I keep behind the camera and play music from while claiming it's coming from Fosi 😜

[@9XThunder]

@@RoseLove1412 you dont have to buy it !! But i agree with virtualhifi, i am 40 years in to the audio, and this amps are very good !!!

[@JohnnyReed-f3f]

Honest, no one will tell the difference, on a tv to earc set up ! Waste of time, you can't say ohh wow your speakers sound amazing? Lmao when it's coming out of your speakers not his at this point ! Wake up people, to hear these you must buy on your own, these are marketing strategies ! Key word strategies ,! Aimed to get you to buy these cheap amplifiers, if your blown away,? Well, I must say, that's at a price point I'm hoping! These have no serious parts in them! No transformers, as I see it, they are 1/4 amps

[@fjb9234]

Not sure I follow your comment. While the recorded audio in no way can help you understand how those amps will sound in your environment and or equipment. Wouldn’t you concede that given all variables in the recordings are constant with the expedition of the amplifiers switching it does give some insight to the difference in how those amps render sound from a relative point?

[@masterblaster3724]

Almost the same, is very dificult to distinguish, its a very thin line betwen, the people who say is diferent... they must have the best ears in the world.. I think if they have a blind listening there is no way to distinguish between them. Anyway great video comparison. Well done men

[@D1N02]

You are listening to a compressed youtube stream. I must say the quality of the sound is pretty good. I can hear differences in tonality and dynamics pretty well. Soundstage is another story altogether. I am using monitor speakers and my pc has an audio grade sound card, that filters out pc-noise pretty well. Listening over laptopspeakers or something will not tell you much. Try using a headphone for comparison listening, preferably using a seperate DAC (dongle).

[@crate718]

there is no sound difference you are just a Fosi fan boy lol. good video

[@InternetExplorer-s9g]

no sound difference on a laptop speakers