do a Noctua mod to it

Not sure but there may have been an issue with the unit? Was it a review unit? I have the KF-92 (seems identical to KC-92?) and it does not make that noise. 10:09

@@nikto34 I can't tell

There are no fans inside the cube - www.audioholics.com/subwoofer-reviews/kef-kc92/KC92xrayvision.jpg/image_large

It sounds like coil whine and it would make sense that if power is increased or degreased it will change.

That's because they hit so hard they rattle your innerds

Erin, we are excited to see your review on this hopefully. If you could include more comparisons in your video, that would be awesome too.

@@MrJhardencdj may be caused by Infrasonic Wave which is no good for helth

I needed to get the review done and tried not to overthink the talking part.

Try 4 of them and be 4 times as happy!

@@michael-4k4000 In the future.

How is going with the neighbours? Aren't these too noisy for a condo?

@@nicoloserri6071 Thankfully I haven't had any issues but I also make sure to run the system at times when I know people aren't sleeping or waking up.

Good question. Not really because they're pretty much operating as a single source. If the box spanned the length of a room, then yes, it could. In this case, consider that the size of the driver is not much different than the distance between the two drivers.

Probably REL because they don't have DSP. But that's also why they don't go as low.

The SVS SB3000 claims to be a 13", but probably more like a 12". I think that one is comparable. I have an SB1000 Pro with a 12" and I think it has more output simply because of the increased enclosure size. The RSL 12S I have is much larger as well as the Monolith THX 10". I think a lot of it isn't just the driver size, but the enclosure size as well. The smaller the enclosure, the more power you need to get the same output and the drivers need to be able to handle that extra power.

@@joentell Thank you. So the SB1000 has more output than both the KC92 and the SB3000?

I'm not in direct contact with them, so I don't know

I have KEF LS60 with KC92 - and there is KEF Connect APP

@@ninja777de with a compatible KEF product, does it allow you to do time alignment? What are some added features?

@@joentell No, it doesn't (the alignement) - but with KEF subwwofer maybe it is something automatic. Personally, I don't see any problem in my medium-sized room. However, in the APP you can select different subs models from KEF or 'custom'. After I selected the KEF KF92 / KC92 model, I had even less output, so I discussed with KEF engineers. Finally for my room I had to increase the gain to 2 o'clock position and to put sub-gain in the app at 5.0 DB. There are also Polarity, Low-pass, High-Pass settings. These are in the Expert Mode. In the Normal Mode, there is the Speakers/Subwoofer balance and Subwoofer Volume - also with the Subwoofer Model choice. In both modes there are choices for the KEF speakers, too. And the integration with Tidal, Qobuz, Amazon, and others is beautifully made. I was at AudioFest in Montreal, and I discussed with a KEF and SVS supplier and he told me to go for the KC92 or KC62 because I have the LS60 and KEF as an integrated system works better as speakers-subwoofer combo. I wanted to buy two SVS but the guy told me that they tested with KEF speakers and it's better to go for the KEF route for sub. He also told me about the sharing between the subs and the LS60 is better and that with other brands it will not be so good. I'm happy with the choice after I fine-tuned, not from the beginning. I feel also that the mid and highs benefit from the added sub (!?).

@@ninja777de thank you for the info. It makes sense that good bass improves the perception of the frequencies above it.

You might be right and I will update my pinned comment if I am in fact incorrect. I did look at the manual specifically for this, and it doesn't say anything about how to use the switches to adjust the high pass filter. It only shows that flipping all of the switches the other direction is what's required if you're daisy-chaining subs.

@@joentell You are still right regarding flipping of the switches for daisy chaining given that it turns off all the different HPF levels 🙂

Delay on the RCA output, not input. Regarding the 12Hz, I can't recall at the moment. I think somewhere in the 95dB range. Not reference level.

​@@joentellhow did you messuret it? Is that in inroom response or freespace?

@@91DivineAngel With the mic no further than 2" from the woofer cone in-room. This allows me to get good measurements with less affects from room modes. I apply SPL compensation based on a typical listening distance of 9ft away. If I were to measure in-room from 9ft, room modes would make the measurement useless.

REW

@@joentell Thank you!

by the way on the dynamic eq, it is perfect for multiple subwoofers. if you get four separate 10" subwoofers they will not play 11hz this kef one, especially at low volume.

I wouldn't mind

The MIE is a GameChanger

It's been a while. I've been busy with my Magic Beans Audio app

Comes in white color now lol

Did the KF92 have the P-flex surround and iBX feature?

@@joentell yes all the same - specification is the same, weight dimensions the same. I think they just wanted to unify code name rather than be different from kc62

@@whitecrowuk575 wow. Interesting

@@whitecrowuk575 no the kf92 don t have the pflex and the DSP is updated on the Kc92

I would take 2 of almost any decent sub over 1 of a better sub. A nasty room mode can take out huge chunks of the audible response. So that's a yes for me. It's too large of a price difference to get only a smaller footprint.

If one has the space for two SB3000's, why even consider the Kef? Many other capable options in that size range.

I hear you! It's a big number. I guess if someone can afford some KEF Blade 2 Meta's, maybe it's a small number. :-)

I would have to say the rs700 just has more raw capability. I would go ELAC. It's close. Https://bit.ly/subwooferleaderboard

@@joentell ok thank you! you mind if i ask what's your ethnicity?

@@viencarlodiego8842 Filipino

@@joentell eyyyy kuya! Lol

@@viencarlodiego8842 sup pare!

It could be a defective unit or damaged in shipping. I will give KEF the benefit of the doubt. Hopefully they chime in and offer some insight.

I made a sub using those Dayton Reference before. It's an awesome driver. I would love to see the sub you made sometime.

That was my first thought, but I could swear I heard something whirring even with no signal.

Actually, I was a bit concerned with the packaging because all of the styrofoam was broken. There's no recycling styrofoam either.

I think objective measurements might suggest that they do match up well against each other. SVS is very popular here, maybe that's why. I know people will ask me to compare it.

We have inside jokes about the term, "musical." What does that mean to you? What measurable aspects of a subwoofer would you say make it musical or not musical? If you mean how well it blends with your main speakers so that the transition to the sub is seamless, that has everything to do with calibration. Getting the delay and phase alignment right, and setting the correction curves so it matches the natural response of the room and your main speakers.

​@@joentell it should follow the music and not go boom where there are non in the music.

That’s up to who sets it up. People tend to turn up the sub until they can hear it without thought to what their source media is. The proper way to do it without a microphone is to use a source with 20-30Hz content, turn it up until you hear bass and then back off until you can’t. That’s the layman’s way. The best way is to use a software solution like REW. As to “boom” and “musical”, that’s up to the speed of the drivers. A light cone material allows for fast response, but it only goes so far. For the most part, any sealed sub is adequately quick to start and stop. Yeah, REL subs are the standard, but they are not twice as quick as another well-designed sub. Also, bass frequencies are inherently slow to propagate. It’s a non-issue.

@@Vidar.m what you've described is the purpose of good calibration.

@@billd9667 I agree with the first part of what you said. A 20hz tone is always the same speed and is based on the number of cycles per second. What I think most people are referring to when they talk about fast or slow subs is the inherent delay I mentioned in this video caused by DSP. REL subs aren't faster at producing the same frequencies, they simply don't have DSP which causes the delay. Once you add the same amount of delay to your main speakers, then you can have the benefit of DSP correction and the same "fast" bass because the relative delay between the sub and your main speakers is 0.