Finally! KEF KC62 Test: CEA-2010A Data!

[@ErinsAudioCorner]

KEF’s little KC62 performs better than I expected, exhibiting CEA-2010A numbers at 20Hz that rival larger subwoofers. Can it take the place of a 12” or 15” subwoofer? Certainly not. But if you need something small and aren’t trying to set SPL records I’m not aware of anything that beats the KC62 (objectively speaking). 🛒🛒 Purchase: Amazon: amzn.to/45VyDwT Audio Advice: www.audioadvice.com/?referral=erins-audio-corner Best Buy: howl.me/ckCCe6kvxNg Crutchfield: howl.me/ckCCbjXueOp

[@Audio_Simon]

It's a very impressive small sub, but it's also more expensive than most of the small stand-mounts out there!

[@MechAdv]

Yeah, it’s 400$ more expensive than my PC2000 Pro SVS boom tube. It’s the same price as the Monolith 2000W 13” THX Ultra sub I’ve been eyeing. I know which way I’m spending my money lol.

[@Audio_Simon]

@StudlyDudly Yeah well.. monolith is incredible value for money but based on what worker conditions and extortion of the environment in Taiwan? KEF OTOH is a British company down the road from me that treats people decently. I'm not exactly sure where this sub is made but I certianly have a better feeling about it!

[@MechAdv]

@@Audio_SimonTaiwan isn’t known for terrible worker conditions, actually Taiwanese manufacturing is usually on par with Korean and Japanese manufacturing. Every state of the art computer chip is manufactured in Taiwan. HOWEVER, the monolith 13 ultra is actually manufactured in China, and that’s a whole nutha story for worker rights/protections. I actually thought they were manufactured in the USA like the Monolith THX amplifiers (2x, 3x, 5x, 7x). That’s kinda disappointing, but with a 5 year replacement warranty and a 45 day full refund window, clearly these are being made to a high standard of quality.

[@c0mbat15]

You're right that it's really expensive. But here in the UK the price differential with the SVS Micro 3000 isn't nearly as big as it is in the US. I actually purchased the SVS 2000 Pro, the SVS Micro 3000 and this KC62 all second hand from ebay and stuck with this. Despite what SVS say the 2000 Pro didn't work in a small room and sounded boomy no matter where I stood in the room. The Micro 3000 and KC62 were close and if I was paying US prices I would have stuck with it. But the KC62 beat it in terms of being able to go slightly lower and integrating slightly better with my Q Acoustics Q Active 200 speakers

[@GadgetyMV]

Love the thoroughness, detailed discussion and brief comparison to the SVS. I could see a multisub solution with several small subst, too.

[@stephenhall3515]

The usual very high standard from Erin. He never argues with laws of physics and conveys this superbly to people who might be new to improving audio.

[@davids2214]

No mention of the high pass filter built-in! One of the coolest features of this sub imo, adds functionality most integrated amps lack.

[@ErinsAudioCorner]

Edit: Yes, you are correct.

[@juliangst]

@@ErinsAudioCornerthe line out has a high pass filter which is adjustable through the dip switches.

[@ErinsAudioCorner]

@@juliangst oh, yes. I didn’t test that and indeed didn’t mention it in the review.

[@michaeljohansson3882]

The function solves the low end challenges with R3 Meta/LS50 - compression/distorsion below 80 Hz. Great feature.

[@ErinsAudioCorner]

@@michaeljohansson3882 indeed.

[@raybensinger8383]

Ive been intrested im the kf92 for awhile cant wait to see that data thanks for all the hard work erin

[@shaymcquaid]

Looking forward to seeing the wrap up! Thanks Erin.

[@rbrant65]

Glad I found your channel. Really appreciate your sincere, unbiased reviews.

[@ErinsAudioCorner]

Thanks!

[@johnanderson4064]

I'd be very curious to see how this compares to the 8 inch Monoprice you just reviewed. That seemed like a fantastic small room sub at a great value.

[@ErinsAudioCorner]

Soon! I plan to make a video comparing a few different small subs once I finish testing the other subwoofers I have on hand. 👍

[@BL-yj2wp]

@@ErinsAudioCorner Please consider reviewing the Dynaudio 9S too. It's a small (SVS 3000 Micro size) studio sub they make big claims about.

[@BobGeogeo]

​​@@ErinsAudioCornerPlease include in your comparison the tested low-cost subs from a while back. I'm very happy with a pair of ELAC Sub1010s you recommended but sad to see current pricing is a lot higher than the $130 I paid for each.

[@lvlfk]

@@ErinsAudioCorner I need to replace my Dayton 1200 with something smaller so I’ll be waiting for that round up!! Right now my front runner is the 8 inch Monoprice THX.

[@NitishRaj]

Sir I am about to buy KUBE 12b . Will it be better choice for reaching 20Hz at mid volume

[@RennieAsh]

11:00 perhaps the volume is too loud and that's why they're all squished together?

[@ErinsAudioCorner]

That’s what compression/limiting is. That’s what I’m talking about. 😉

[@JohnSmith-qi6co]

KEF apparently has really good engineers. Hard to not like that company. They seldom do anything that isn't absolutely excellent.

[@dexterts1]

Hi Erin,since you have a lot of small subwoofers for testing,it would be really interesting to get B&W ASW608 for comparison,as they can be had for a good price

[@ErinsAudioCorner]

Probably not anytime soon. I’ve got a lot to get through here first.

[@ognewb]

I love this sub. I feel like the opposing driver design would make it have less sub crawl because of the cancellation, like some smaller subs often do.

[@ErinsAudioCorner]

Definitely. It didn’t move while I was demoing it. Can’t say that about other subs.

[@chinmeysway]

@@ErinsAudioCornera pub crawl is almost like a sub crawl but I can’t remember why.

[@NigelStronge]

You can use opposing drivers (and the sealed cabinet size) to limit the driver extension and dual voice coil for feedback which cancelled out the box and frequency limitations that would normally apply.

[@phillipmorris9847]

Ive heard it and was impressed for its size, perfect for my space but not at the asking price

[@edwardroman6844]

I really like your honesty. Great job.

[@ErinsAudioCorner]

I appreciate that!

[@roberleiton]

Thanks Erin for your reviews! Its very helpful. In your opinion is better two rel t7x or one K62, for pairing a LS50 Meta or R3?

[@Natan9000]

So what you’re bassicly saying is that’s it’s perfect for smaller rooms. But in terms of m2 what do you consider small or medium?

[@andres77fj]

I really appreciate the great reviews! So helpful and interesting :)

[@ErinsAudioCorner]

Thanks!

[@michaelharness3258]

Good to see you back on the KZbin. How’s the new chapter in life going ?

[@ErinsAudioCorner]

Thanks. It’s going pretty good at least up until I injured my back couple months ago and it’s been a slow recovery process. But I appreciate you asking.

[@michaelintyghvalley]

@@ErinsAudioCorner oh! The price of having fun. Ouch! Glad to hear that you are doing well.

[@dananskidolf]

I came across a bit of a debate while looking into dual opposed subwoofer designs like this - seems many people have the impression it reduces the sensation of those low frequencies hitting you, possibly because the sub (and floor it's on) has negligible net force on it, rather than the full force you'd get from a single unopposed driver. Erin, given you've heard and tested more subs than most, have you experienced this difference - subjectively or through any kind of measurement? And thanks for another great review :)

[@ErinsAudioCorner]

That’s a very good question. I will give you my personal opinion. Not necessarily rooted in fact, but just anecdotal based on experience. The sensation of bass can help improve the sense of output. However, the issue I have is that many times the trade-off is that you hear things rattling in the room. Those vibrations go somewhere and sometimes are transmitted through the floor into walls, doors, etc. resulting in doors or pictures vibrating or furniture vibrating. Those vibrations and rattles are an audible distraction and severely override the impact you may feel from tactile feedback.

[@dananskidolf]

@@ErinsAudioCorner That's a very worthwhile consideration, thank you! Something to bear in mind as I plan a home theatre. I think both aspects you describe fit in with my expectation from general wave behaviour, that a air/solid boundary generally reflects sound because the speed of sound changes abruptly across that interface, so a speaker that only moves air, even with the same SPL, won't rattle either you or the nearby picture frames with the power transfer efficiency of one that also puts forces on the floor.

[@edouardpalu221]

Many thanks for the excellent content (this video and others)! I am wondering if two of these would be accurate in a 5,5 x 4 m living room with Revel F226be's, for both movies and music. We are not planning to play loud, in fact we live in an old appartment with appallingly bad soundproofing, so not disturbing (too much) the neighbors is a major concern. So the question is: would these add significant bass at low or moderate volume to excellent tower speakers that can go pretty low by themselves? Thanks!

[@rikardekvall3433]

Erin you does boost the bass. Question. How do I measure my subs, one 12” sealed front firing and one 8” down firing with a big port. Where do I place the UMIK mic? 1m/1watt?

[@MRPC5]

Am i correct in thinking this limiting would mess with an auto cal like Audyssey even in a smaller room? Thanks!

[@ErinsAudioCorner]

You’d need to be aware of it and the volume you’re setting it as the reference.

[@ddobster]

it's damn fine with a pair of R3 in a small-ish room i hate the auto-on tho, it's a pita to turn on sometimes at lower volumes

[@Olyrous]

What would be considered a small-medium room for the purpose of using this subwoofer?

[@sudd3660]

i really like these micro subwoofers, had a few myself, like the velodyne microvee. I wonder if you can post a 20hz measurement in room max db. does room gain increase the db or what can people expect in room. for comparison my diy sealed subwoofers with a 10" woofer in each does 107db at 12hz in room at listening position, with a 100watt amp.

[@JoshM7]

If you toss this in a room with the longest dimension 12 feet or under. You might get around 95dB + or - a few dB at 20Hz. As usual depends on the room/placement/listening position. Now if you were feeling silly and tossed it in a car. You might get around 100dB at 20Hz+. But I doubt anyone will be cool enough to toss one in the car and measure what it can do. (Bashfully looks towards Erin. lol)

[@sudd3660]

@@JoshM7 i know some bass is location dependent, but below 20hz in a small room it is even everywhere. maybe a bit louder right near the woofer. i was thinking that 107 is needed to make 12 hz perceptible in this room, does that translate to any room? measured from listening position. the importance of the lowest frequency target is that if you can reach that then the rest should be easier.

[@JoshM7]

@@sudd3660 If 12Hz is perceivable to you at 107 then if you can do 107 in another room, yes it'll translate to other rooms. But some other rooms might have a higher noise floor or rattle more which makes it harder to hear it at that specific level. Also have to be careful you're not hearing distortion vs the fundamental. At 12Hz you're more sensitive to distortion than at 40Hz for example. And under 20Hz can depend on placement still I think. Edit: Was playing around with tones under 20Hz and I guess they are even almost everywhere. Closer to 20Hz getting near the sub looses a dB or two but ultimately I guess under 20 is even almost everywhere in small rooms like mine. Could have sworn in the past I had areas in the room that were louder and quieter with low bass. But I almost never move around when listening to something with low bass and never think about it these days.

[@ron521]

What about subwoofers that have the driver directed to the floor such as the REL 98? Would you test it laying on the side? I was incapacitated when my wife left me. Glad to see you have at least recovered enough to get back to work.

[@EvgenyLebedevMusic]

hey Erin! what sub cable should i use with kc62? now i am using inakustik star. is it necessary to make an upgrade, or it's a snake oil?

[@ErinsAudioCorner]

Pretty much snake oil.

[@EvgenyLebedevMusic]

@@ErinsAudioCorner thanks, mate!

[@seanb3303]

I think Auto EQ is a game changer. Elac came out with it a few years ago and hopefully SVS and others catch up.

[@sudd3660]

auto eq it is like a auto limiter. keeping the frequency response extended as low as it can with the volume. perfect for adding more subwoofers in the future. i did my own eq to get the lowest bass, at the cost of max volume when content has deep bass. i have no safety line since it is doyi subwoofer.

[@seanb3303]

@@sudd3660 ELAC auto EQ is different than a limiter in that it measures the response from your listening position and adds EQ to provide a more LINEAR response. I believe it also controls phase and the crossover

[@DavidSusiloUnscripted]

Paradigm, MK Sound, JL, Martin Logan, and more have used Auto EQ since almost a decade ago.

[@seanb3303]

@@DavidSusiloUnscripted Elac uses a cell phone app which is really nice. I’m guessing those companies you mentioned include a microphone

[@gamerpaddy]

have you got your hands on a sunfire xteq or true yet? only downside to them is they use a passive rad on one side making them wander around the room. 10 inch subs have a fs of 24hz

[@ErinsAudioCorner]

I haven’t.

[@GracedSeeker763]

I was hoping to see it in use. Because I’ve heard the travel on the speaker is crazy

[@mpugne]

I always wondered how close they got the drivers to match each other not that it would matter much as long as they are in the same ballpark but just curious.

[@altruistvideo]

Thank you for your professional reviews. I am faced with the choice of purchasing a REL T/9x and a 23-year-old ELAC Varro RS700 model. I've been reading and watching reviews for several months. Was it possible to compare both? I'm only interested in music, not movies. I will be very grateful for your answer. (Alexander)

[@ErinsAudioCorner]

I’d take the KEF over the REL, personally.

[@teampyro911]

Is this device good for studio work?

[@1Aquadon]

Thanks Erin!!

[@damo5701]

Was originally looking at the SVS 3000 but one dealer (local as well) offered to match the best price I received on the LSX II's & SVS3000 combo and substitute in the KC62 instead for the same price. I wouldn't let price deter you, KEF have regular sales and it is often possible to get sizable discounts. Very good sub, I have it paired the KEF LSX II active speakers in a computer/2nd lounge room approx 8mx5m, mostly for music. To my ears in my listening space, fwiw, the combination is magical, with revealing detail and clarity, little if any brightness and no fatigue, and plenty of body. The LSX II's by themselves have ok bass extension but the sound moves into a completely different league when paired with the KC62, integration is easy & tweekable, soundwise they also integrate almost seamlessly. The KC62 provides plenty of tight controlled extended bass, delivered with solid punch and fast pace. To achieve preferred listening setup the KC62 actually needed to be dialled right back, bass output is not an issue, although I have not used for HT so check that out for yourself. I'm surprised at how good the stereo imaging is in near field listening, vocals are directly centered and seem to come from the screen in front, the soundstage can extend beyond the speakers with some music. Very impressed with the setup's ability, particularly the KC62, to scale and fill the space when cranked up yet still sound fantastic in quiet near field listening.

[@ryanuptheroad]

I'm running the same combo. I just left the settings alone after telling the KEF app that I was using the KC62. Really happy with the result. Have you found it worthwhile to mess further?

[@damo5701]

Initially found the KC62 overpowering with out of the box settings and original placement. Changed where the computer and speakers were positioned in the room and played with settings in the app. Certainly worthwhile to get the sound you like. Sometimes I tweak the speaker/subwoofer balance and subwoofer volume settings in the app when playing different styles of music or to add bass to some recordings. Not exactly sure what the speaker/subwoofer balance does, it seems to change the crossovers, as too much subwoofer balance made the KC62's location detectable, ended up setting it to almost all speaker.

[@onortosu]

Thank you Erin! Any chance you have or plan to review JBL's LSR310S ? It often goes on sale for a decent price, good controls, like that it can do the crossover for balanced, but no idea how well it performs. You can probably buy 2 of them for less than 1 of these other options which might not have the crossover options builtin.

[@ErinsAudioCorner]

It’s not currently planned. But it could happen one day.

[@ValerioCongeduti]

Very informative review! Thank you! I happen to have just bought one, and my trial period is about to end. I've been on the fence between this and the Rel t7x. For this reason, since you are testing several subs, I think it might be interesting to test Rel claims through some measurements. In particular I'd be curious to know whether the famous Rel high level inputs actually make a difference or not.

[@eyeshezzy]

been waiting for this at your corner for a while. Now i am waiting for JL subs too😅

[@ErinsAudioCorner]

Soon!

[@markpearson1006]

Thank you for your channel. I have owned the LS50 Wii plus a single KC62 for about a month. Im still trying different locations and set ups but overall I would say that the sound quality of the system is very good ie it is detailed and clear. It seems best at lower to mid volumes in a room 8m x 8m x 2.4m high. As volume is raised the bass drops off but the overall sound is still loud. At these higher volumes is sounds a little harsh but detailed. I have found best bass with the KC62 plugged into the smart connect RCA/LFE in manual/polarity on and am still testing various other settings. This is as you described. I think if you are a power user - loud rock, drumnbass - this system is not for you. I would recommend that you need to try this system before buying as it was £3,700 (GBP) with some current offers in the UK

[@nhennessy6434]

If you have a little more room, and your own dsp/crossssover unit, SVS' all time best seller, the OG SB2000 with a 12" woofer is selling on their outlet site for $500. You could get two and still pay less than for the KC62. Just saying.

[@FranzMeynert]

The Kali Audio WS 6.2 is one I am curious about. Franz

[@ErinsAudioCorner]

Coming soon. Just got it yesterday. 👍

[@stephenderluguian6776]

@@ErinsAudioCorner super curious as well. mines im the mail!

[@danielezzet8870]

This sub is just perfect to use with a high crossover since it use small drivers that had better dispersion than a 10 inch driver around 100-140 hz, right?

[@ErinsAudioCorner]

Yep. But don’t place it too far away with a crossover that high. Subwoofers need to be integrated like any other driver in a speaker so make sure that you are mindful of the radiation pattern and combing effects of placing speakers (subwoofers + mains) too far apart.

[@ricardodiaz1753]

Dumb question, what are the rca outputs in a subwoofer for?

[@Olyrous]

You might want to connect a second subwoofer, or to connect your main speakers amp in the scenario that your low level signal goes to the subwoofer first to take advantage of its DSP capabilities (crossover/low-pass filter).

[@welderfixer]

Subwoofer are great, but the effort needed to integrate a subwoofer into a sound system is huge. I recommend packing a lunch and kicking everyone out of your home for a day. If you survive the first day prepare for therapy after the next round of tuning and the next attempt at tuning and the next..... Once you get it set just right sit down and enjoy your favorite music or movie with a well earned beverage. Now that you are relaxed and listening intently Satan may sit down on your shoulder and whisper in your ear: "So, Big Guy - Is it really set right?" Yeah it happens....... 😉hahahaha

[@daimozu]

You only need this if you care about bass note/definition and accuracy in your low end frequency. I have a pair of kc62 on my main reference system. my single svs2000 pro has better spl, but I cant hear any bass definition because of its sheer power. Kc62 is like a sports car, while my sb2000 pro is like muscle car. each has its own purpose.

[@nmnate]

Awe, it's so cute. Too bad at $1400 it has to compete with something like a Rythmik E15 if you're willing to go much larger in size. I've got a moderately large room so, I'm obviously going to preference a bigger sub. I'd have to say it's a pretty slick package for those that need or prefer a really small sub for a small space. I think dipole makes a lot of sense for a sub, especially a small one.

[@lllllllllllllllllllll1lll1]

Agreed, it has some tough competition at the price point. If I was looking to spend that kind of money, I'd opt for the KEF for my small living room. Perfect for the room size and my (rather minimal) SPL requirements. I could also see myself pairing it with studio monitors for a bedroom studio environment. Perfectly suited for that application. but agghh... $1400... that's some serious coin 😂

[@nmnate]

@@lllllllllllllllllllll1lll1Yeah agreed. When I upgrade my LS-50s, I might stick them in a bedroom. This kind of sub might make a ton of sense. The high pass filter is really appropriate for that application.

[@caioferrari]

Other brands are finally using dynamic EQs like Bose uses a long time ago on its speakers to make it sound better

[@ferdinandbardamu3945]

With so many settings on subs it's a wonder Erin has the time to listen to Young Jizzy.

[@FamilyAvila-ix6pf]

My guess is he is listening to soul survivor by young Jeezy. The beginning of that song can make some subs sweat lol

[@lordofthemound3890]

How about testing the Emotiva Se12? They’re on sale for $269. I’d like to see how it stacks up against other bargain subs.

[@adaboy4z]

Kef makes good subs, I have the Kub 12b. I also have a 6 inch Episode Evo and a good built small sub will surprise you, but as you said it lacks that killer hit you in the chest SPL.

[@pumpituphomeboy]

I have 2 kube 12b's. A pair of them provides plenty of slam.

[@fransdoolaar3975]

Nice review. With the growing capabilities and subwoofer outputs of processors (even combining LFE + speaker support) it would be interesting to consider to use more 2 or more KC62s in stead of one. That way the combined SPL for LFE increases and the homogeneity of bass production in the room may increase. Also, the limiter on SPL in the lower regions when used as for speaker support may be less likely to be noticeble as the rest of the speakers already produce sound and the combination may be ear bleedingly loud anyway. Yes, obviously, if it can do the SPL all by itself that would always be better and less compromising ;)

[@stackoverflow8260]

Can you please do a review of Rythmik FM8?

[@annenominous7220]

Outstanding, as usual. Thanks!

[@ErinsAudioCorner]

Thanks!

[@mndlessdrwer]

If you've got a small room, then the KEF LS60 and one of these should be plenty. Honestly, the LS60 on its own is probably good enough for the vast majority of music out there, since not all that many artists like to slam sub-40Hz beats that often. I've got a pair of KEF iQ90 and they're just about good enough in the low end that I rarely think about adding a sub when I'm just listening to music, and my music preferences are esoteric enough that there are actually some songs that try for that sub-bass slam. It's generally not necessary as long as your speakers can hit 40Hz with an acceptable degree of authority.

[@charleskatz2606]

Erin would be great if you could try out one of the new Magnepan collum sub+ but this was great these look like natural for Meta R3's if a tad pricey

[@davistaishi]

what about distortion?

[@lextr3110]

Would love if you could review rythmik FM-8

[@StCreed]

I think the kc62 is great if you have to place the sub in a cabinet. No vibrations really help there.

[@xTG14x]

I almost bought one of these, but then I remembered that the Rythmik G22 is a thing, and the same price :)

[@StCreed]

Not in Europe.

[@xTG14x]

@@StCreed REL though!

[@keepingupwiththejones2933]

This is cool for people with limited space.

[@Zhiloreznik]

If it wasn’t for the expense and R7’s already pissing off the neighbours I’d consider it.

[@ErinsAudioCorner]

😂😂

[@NeilBlanchard]

There is a lot of interesting and good tech in this unit. But the 0-180 degree switch is pretty lame, in my opinion, in an expensive subwoofer. Because the path lengths the sound has to travel from the main speakers to your ears vs the sub to your ears - is going to not be in phase or 180 degrees out of phase. It is going to be somewhere in between those.

[@ErinsAudioCorner]

Agreed. I’d have liked to see a proper variable phase (all pass) filter.

[@deankim6687]

Great review

[@neiker234]

I never know what these reviews mean by "small/medium/large room"

[@ErinsAudioCorner]

THX has a spec and that’s what I go by: www.thx.com/product/thx-certified-loudspeakers/ Small = Compact

[@krupkake1]

Should you ignore room sizes when considering a product for near-field listening, like at a computer, or is it still a factor?

[@34332]

​@@krupkake1 Near field configuration can indeed remove a good bit of room influence, but it won't remedy out of control reflections or echoes in an acoustically reflective and reverberant room(size)...which can negate many of the benefits of a near field listening configuration. You still want to ensure that there isn't a high percentage of opposing, parallel and acoustically reflective boundary surface area.

[@Nick_4i]

@@34332 Why the emphasis on not having opposing, parallel surfaces?

[@adamjj85]

Lol at Kef's 11hz -3db spec. Looks more like 27hz! That's a big difference, I don't know how companies are allowed to fudge specs like that.

[@paulhayes2917]

I was thinking the same. I was intrigued by this sub and that claim, but they have not said how they arrived at the figure. Few do - I imagine it's at very low volume with a very optimal room gain. Great review though from Erin and it's convinced me that this is not going to be enough for my needs.

[@JoshM7]

According to my super scientific calculations. (joking. Just some WinISD tomfoolery guestimates) The woofers were probably moving around 7-8mm for the CEA test. Wonder what the xmax rating is on the drivers. Maybe the xmax rating is around 10-12mm and they limit them to 7-8mm so the cone excursion distortion doesn't get too out of hand? Can only speculate with "on paper" stuff. Real world might be different.

[@erkkijaakkopetteri]

I don't see the KC62 whitepaper mentioning Xmax, but the BL was tested to only drop to 80% at 15mm of excursion so there's that...

[@JoshM7]

@@erkkijaakkopetteri oh that's good to know. I think xmax ratings depend on how the manufacturer rate them. But I've seen some rate xmax to 70% BL. 15mm at 80% BL is pretty good. I expected my on paper stuff to be incorrect. But it having 15mm at 80% BL is unexpected.

[@rosssmith8481]

One problem with this speaker is if you use the the little clip for speaker wire connection. Instead of having the left right spaeker connections negative negative, or positive positive which are right next to each other. They have positive negative for each speaker right next to each other. Which means if the wires touch, the speaker blows. Bad design.

[@JoseFerreira-zb7wh]

Waiting for you to review some competition. (maybe some cheaper one?) I actually live in an apartment, listen to low/ moderate volume levels and have a medium sized room so this could do the trick, but it's way too expensive for what i can afford. I don't need something to go as low, as i don't want to upset the neighbors, 30Hz would be more than enough but i'm looking for a smaller unit with a linear response to fit my stereo system. I'm also looking into the used market and have seen some bowers & wilkins asw608 and 610 with reasonable pricing. I live in the EU and most good and affordable subwoofer brands are from the us so that makes it even more difficult as those units are more expensive here. Keep up the good work!

[@ErinsAudioCorner]

I’ve got a few others on hand that are smaller designs you might be interested. Stay tuned.

[@JoseFerreira-zb7wh]

@@ErinsAudioCorner have you heard of Audio Pro brand? They're a swedish brand and apparently have some subwoofers for reasonable prices (at least here in the EU).

[@johnnyrebellion8672]

My guess is that it has a linear power supply and not a switching supply

[@maymanist]

Very interesting and informative review, thanks! I am looking to buy eityer tye kc62 or the rel t7x tobpair woth my Falcons LS35A golds. Just that the kc62 costs nealry twice that if the rels in my country. This sub is expensive

[@ristretto97]

Feels like increased roll-off starting as low as 30 Hz is still gonna piss off the neighbors in apartment mode. Oh well :D.

[@wktek48]

Would it be good enough as a second sub next to couch in combination with the svs 2000 pro? I have a small/ medium room..

[@ACM1000000PT]

20hz at 80dB it's at his max capability, right? when it's hitting already a lot of distortion and cannot do more?

[@ErinsAudioCorner]

The CEA-2010A specifies a threshold for allowable distortion. I’d have to see what distortion order was exceeded to cap it there. I don’t have that readily accessible.

[@gingernut3411]

Erm......no footage of it flexing...😐

[@ErinsAudioCorner]

What about of me flexing?

[@gingernut3411]

@@ErinsAudioCorner not you 🫣 the sub. Footage of it running, the drivers pushing some air.....or did I miss that 🤔

[@scottbennett3119]

Smaller than a vinyl? The Beatles referred them as records. They had many hit records. But, you knew that.

[@johnd5542]

The thing with sound, and especially bass, its all subjective, and influenced heavily on prospective. People who dont have bass in their system are easily impressed. Even in my own setup, when I 1st turn it on, bass is thunderous. It got me checking my gains a couple of times. But after 5mins of jamming, the bass blends, seemingly light to my ears. On the flip side, if you have heavy bass in your own system, the lack of bass in a system, is extremely underwhelming.

[@neilfox4626]

Check out the JL Audio "D" series.

[@ErinsAudioCorner]

Dominion? I’ve got the d108 here. I posted the CEA-2010A results to my Patreon a few days ago. Video will be out in the next couple weeks.

[@neilfox4626]

Wish it was the 110 but I can't wait.@@ErinsAudioCorner

[@TonicofSonic]

I would love to see you test some car subs as home subs. Reason I say that is I know it only took me a couple hundred bucks on the used market to shake a whole city block as a younger adult. Curious what you would have to say on it with even minimal data.

[@proffessasvids]

Lovely vid dude! Thank you for the info. I wanted to know about the actual performance of this woofer. Xx

[@tonymolina7744]

We like the subs, the subs that go Boom. Thanks Erin!

[@commanderrussels2612]

Only thing I don't like is that it doesn't use an external amp. I'm getting tired of plate amps going bad, and they do go bad often.

[@bbfoto7248]

@ErinsAudioCorner Good review. 👍 I wonder what DC voltage the internal 120VAC PSU is providing to the amplifier rails? Ummm...either way, throw it in the passenger footwell of the Tesla fed by a spare processed channel off your HELIX DSP Ultra for a little in-car test. 😊

[@chinmeysway]

Can you test how many dollars this will cost us thanks

[@TheTrueVoiceOfReason]

Dude! Is that a new DD shirt? Current tour? That was 2 weeks ago for me. Last week was Peter Gabriel.

[@Nick_4i]

But Erin, it has two 6.5" drivers, thats the same as a 13! (yes, I really have seen companies use that logic when talking about dual driver subs) Really, I just wish Kef would make something similar with dual 10s, but it would probably cost as much as a pair of R11s.

[@ErinsAudioCorner]

The KF92 might be what you’re looking for. That review is coming soon.

[@Dasbeerboots]

​@@ErinsAudioCornerI have two KF92s in my living room. They're everything I wanted and more. Massive upgrade over my old Klipsch R-115SWs.

[@Nick_4i]

​@@ErinsAudioCornerHonestly, I'm planning on buying 2-4 sb3000s (not micro) in the semi-near future, so I doubt the 92 would be on my short list. I could be wrong, though. I just watch these videos to learn stuff lol I'm really looking forward to the small sub comparison.

[@Nick_4i]

I just realized the kf92 is dual 9" which is closer to what I said than I realized. I guess I just want them to make a dual 12" now that I think about it

[@Dasbeerboots]

@@Nick_4i They likely won't do that. The KF92's drivers are borrowed from the Blade One, which has four 9" force-cancelling bass drivers. Those are the largest (force-cancelling) drivers they have commercially available. The Blade Two has four 6.5" force-cancelling bass drivers, hence the KC62. The Reference 8b is their flagship subwoofer, but I believe it uses the same 9" drivers as the KF92 and costs a whopping $7,000. It also has seemingly worse specs than the KF92.

[@FOH3663]

Youre right, physics win out. KEF however, is putting in the work.

[@SJ-ip3cj]

Can I put this in my car?

[@whatfreedom7]

$1400?! Oh hell no. I’d be buying a SVS micro 3000 which is 10.9x11.7x10.7 for $899 and have plenty of money left over.

[@ErinsAudioCorner]

You might be interested in the review of the SVS I posted a couple days ago. kzbin.info/www/bejne/rpXTZICEaZiCjdEsi=Dxu_32J9tmLE5Pel

[@p_mouse8676]

1400 or so bucks for this? I have seen 8 inch (and even 10 inch) subs with the same/similar volume (therefor size) selling for A LOT less, performing porbably better. Sorry, I am not impressed for that price at all. Would love to see some Klippel measurements of this btw :) Espeically BL(X) and Kms(X) + distortion.

[@ErinsAudioCorner]

To be clear, I’m not advocating this is the best solution. But based off my recent testing I don’t know of another subwoofer its size with more LFE. If you can tell me of one then I might try to get it to review. The SVS 3000 Micro’s CEA-2010A results is about 5dB below this subwoofer under 40Hz. The KC62 also rivals the JL Dominion 8 at 20/25Hz and is notably smaller. I can’t think of another subwoofer this size that has better numbers.

[@AbsoluteFidelity]

Show me one sub of this size that has this extension. Im waiting.

[@johnsmith-i5j7i]

Kef guy really didnt like it when mentioned erin, then went back to "it plays to 11hz" yeah at what spl and distortion. Silence. lol

[@gaborszabo2880]

Hi Erin! Can we talk about Frequency Range: Sub-bass 20-60 Hz Felt more than it’s heard and takes high-quality headphones or speakers to reproduce; most instruments struggle to enter this range. Bass 60-250 Hz Determines the overall power of the music, largely emphasized by bass synths, bass guitars, bass drums, or piano. Ander 60 Hz we are in sub-bass territory. If a sub dose 30 Hz / 90+ dB that's not a bad, shallow subwoofer. If it dose 20 Hz or lower at 90+ dB, that's a better subwoofer.

[@chinmeysway]

Would be neat if the review testing involved more than your huge room by listening in a small and medium or and super huge room.

[@Grizzlyorso]

Not sure I would even call this a subwoofer. SPL is way too limited considering the needed crest factor with music but especially for movies. Let's also remember the cost of the subwoofer, which is high.

[@tpcjames111]

This was good one, cool little sub but even in my apartment living room I don't think that sub would the job for me.

[@sammy10001]

Imagine if kef made 15 or 18 inch version subwoofers to fit their thx and meta speakers 😳😳

[@auburn2031]

Ok you can buy 2 SVS micro 3000s for the price of 1 of these!

[@Wharariki]

Really, in the States I presume? As they cost about the same here.

[@auburn2031]

Yes in the states.

[@jimgardner5129]

15"? That's for folks that needn't worry about the WAF. I don't personally know ANY women that are happy with 15". Nor 12" for that matter.

[@chinmeysway]

Oooohshit 1500 ?!! Dillard’s