Mr Darko you should do this more often, that way like you say we can all learn something keep up the good work..🔉🎧💿

@patriktakacs

2 жыл бұрын

Couldn’t agree more!

I do like this departure from normal. Follow up with questions that is. Thank you.

Great video! The REL high level connectors would be connected to the speaker terminals of your amp. The main speakers will also connected to the binding posts. The effect on the impedance of adding these REL high level connectors to your amp is benign. What this does, based on my experience, is having the same tonal characteristics of your amp also carried over to the REL, which makes for better integration and better cohesiveness. By using two REL subs (one for each channel) you can have a better sense of space, depth, and width. Low frequency information from each channel can be more defined (now in stereo). Not to mention a more even bass response in the room. To achieve this, it may take days or weeks of experimentation but it’s worth it. Adding subwoofers is not really about adding bass, but rather extending the range of the main speakers and ALSO improving sound stage and imaging, thus improving the whole system.

Yes to more of this format. Appreciated how respectful you were to each comment. Also appreciate ideas over products.

I’d recommend the podcast John did with Srajan on bass management - priceless

Excellent video John. It’s alway nice to have the follow up questions answered. Everyone suggesting 2.2 is spot on in their suggestion too. Can’t wait for that video.

Absolutely loved your comments on comments! Keep these videos coming. Thanks 🙏

Yes please do it! Get an AVR amplifier and compare with a similarly priced hifi stereo amplifier.

I love this video and the format. Please do more of this.

Hi John (and other KEF KC62 users), I had the same problem with the KC62 taking a long time to come out of standby mode (when paired with the LS50 WII). Sometimes it would also revert back to standby, especially when listening to music at lower volumes. Ben Hagen posted a workaround for this problem on the Roon forum. Pretty sure I can't post links here, so I'll just copy and pate the solution below: 1) Select the sub option in the KEF Connect app and make a note of the sub out low pass filter setting. 2) Adjust the sub out low pass frequency to the highest setting (so all the way to the right) 3) Adjust volume/gain as mentioned in the app 4) Switch sub to MANUAL mode rather than LFE 5) Adjust the sub’s onboard crossover dial to the frequency noted in step 1 This will send a wider bandwidth signal to the sub, and is significantly ‘out of the way’ of the sub’s own filter to not cause cascading. With the higher bandwidth, there should be more signal at a high enough output to help trigger the sub and keep it on. If you listen at lower volumes (3 o’clock on the sub has done me well personally with the kind of music I listen to at around 40 volume on LS50WII), then you may also consider increasing the sub gain on the app and reducing the volume dial on the crossover to compensate. Not sure if this would work when paired with other systems though.

I really liked this experiment of yours, it makes you look more approachable. You’ve definitely got my vote for more of these types of videos in the future.

Excellent video as ever (please do this type again) and so refreshing to see a back and forth on comments/questions/answers that's interesting, informative and courteous. You set a great example. Keep up the good work!

I dig this connective Q&A corralling & format John. I got my first sub after seeing your “first sub” vid and reading Phil Wright’s T5x review on your website. Adding a down firing sub transformed my listening experience and added a whole new dimension that I was missing and look forward to your 2.2 dive. Also, thanks for energy put into the channel to keep it polite and courteous, especially for people like me and who are still fairly new to this community.

I really loved this video and your previous one, I really liked the way that you approached your analysis of the two subs. I have two subs in my room, one that is very close to the side of my couch and one that is near the main speakers in front of me. The sub that is near my couch is sealed and I have it plays 20-40Hz, the one in front of me plays from ~30Hz up to 120Hz. I have built both of these subs myself and I know that that isn't for everyone but the thing that has been a real eye opener for me has been the fact that the sub in front of me is open baffle. It produces such wonderful and textured bass that gives a wonderful presence to acoustic bass when I am listening to jazz and the sealed sub beside me hits me in the chest when I am listening to 'oontz - oontz'. Love it all keep up the amazing work!

Hi John, Really liked this "discussion format" of follow-up to your review. More please!

I like the format. Please continue with this journey.

Thanks for both of these subwoofer videos, I'm looking right now and this video helped me quite a bit.

What a great video concept! Love it!

I wasn't sure I was going to enjoy this video, but I really did! Having a follow-up to your 'full production' videos really adds another dimension and is very enjoyable.

Great video. Your discussion of delay in this video and the last one was very helpful to me.

Wow! Absolutely love this channel!

Fantastic approach, John. You handled the qs and comments so well. Thanks for your effort and education!

Great experiment video! This is a very good format that answers a lot of important comments.

Fantastic approach John! I keep learning quite a bit, even when I think I have the general concept figured out in my mind 🤔. Thank you!

Great video John, I found both the questions and your responses very interesting. Great way to deal with some of the comments. Thanks.

love this format

Great vid! Keep them coming 👏🏼

This was great, please keep them coming...

Thumbs up for the "follow up" video concept John. I've an old Paradigm sub that really takes a jolt of volts to wake up. Glad to learn I'm not alone with that issue.

Really enjoyed this and I hope there are more to come. A lot of great information can be had from the KZread community and I hope videos like this will help cultivate an even more productive HiFi conversation. Thanks Mr. Darko

Love this approach👍😎

Looking forward to the 2.2 video.....thanks for the great content and videos

Nice video once again mr. Darko! Hope this video get's alot of views and we can have more of this. I hope you combine 2.2 setup in your next video about subs. For me it was a game changer to go from 1 to 2 sub. I have 2 Forcefield 3's now placed behind my speakers and it is just easier to implement/adjust them, specially in augmention mode when you have 2.

Actually John, that 5 millisecond delay is critical. I’m not an acoustic technician, but I do take a keen interest in the subject. Delays of greater than 5 milliseconds are treated by the human psycho-acoustic/auditory system as primary reflections. Where as, delays of less than 5 milliseconds are treated as direct sound, or a smearing of direct sound. Therefore, the shorter the delay, the more precise, accurate, sharp, tight the reproduction. I use Rel subs. Why? Because they’re what my trusty dealer recommended. Yes, I think the ‘high level’ input is effective. Also many Rel subs including mine are equipped with down-firing drivers, either passive or active depending on the model. These down-firing drivers utilise the floor to help produce a more even bass distribution! Rel also put no markings or indications on their crossover knob. Rel want to prevent their end users from setting the crossover to the point where the main speakers roll off. Rel claim that if the crossover point on the sub is set by ear, then the room will have been subconsciously factored in. I will say, that it took me an eternity to get my Rels dialled in correctly. John Hunter, chief designer at Rel said in one of his many helpful tutorial videos that you would just know, when you’d got it right. That proved to be absolutely true. It took me around 7 weeks, but just as John predicted, everything just suddenly fell into place and believe me, the time and effort was well worth it. I’ve not auditioned either of the subs you reviewed. I’m a great advocate of hifi being heard and not seen. If you can’t see the source of the noise, it makes the whole illusion that is hifi, more plausible. In that respect, the micro subs you reviewed have the advantage. As much as I love my Rels, I feel that much tine and effort could have been saved if they were equipped with the ability to adjust them from the listening position, either via a remote control or an app. I did my best to use the wife as a remote control, but, she despises my interest in well reproduced music, and refuses any type of participation or assistance.

@osliverpool

2 жыл бұрын

The primary relection thing is true, yes - but I've always thought the effect is only at higher frequencies, and that the delay needs to be multiples wavelengths long. At low sub frequencies, where even longer delays are still only a fraction of a wavelenth, we can't even hear the directionality.

Loved this video - feels like your engaging with your audience in the right way. 🤘🏼

Hi John, Nice video, this one and the micro sub review. I would like to add that I learned about hifi from my mate's dad back in the late eighties and he owned the top line of Kenwood L-1000 series and Magnat speakers MP-X 088 with the MP-02 plasma speakers. He loved classical music and had a additional bass unit which was DIY and is sat behind the couch and there were 2 units of 30 cms in there. Crossed at 150 hz because 98% of the energy required is in the first three octaves (160Hz). This was to me at the time the best system I heard and my mate and I were into doof doof music in the early 90's (house in The Netherlands at the time) we knew where to play our cd's. Great fun. Working in Professional Audio for a few years and learning that the subs are crossed at 150Hz with a 24dB per octave active crossover is the rule of thumb for PA systems and if you like live recordings and you have a similar setting at home I guess it adds to the sound stage. I have always have had 1 or more subwoofers to take the bass load from the main speaker and limit distortion (somebody mentioned it) but that is main reason for always having a sub in my mind but hey I learned that early on. Cheers, keep the videos coming. Jeroen

I think comparing a REL t5 using the hi-level input to the SVS and/or KEF would be interesting as it would be sort of an old vs new or future vs traditional comparison. REL encourage users to use hi-level input and run speakers full range which is a very different approach than the digitally controlled crossovers and hi-pass/low-pass filters used by KEF and SVS.

Great vid, technical and fun.

This style of video was refreshing keep it up.

Love this!

Bravo - love the 2-way conversation enabled by Q&A

Found that really useful John and added significantly to the original video.

Hi John, love this video - would welcome more comments videos like these, always love engagement like this with the fans - keep up the great work :)

Yep - good format, one of your strengths is relating to your peeps … while being informative but easy going. Thanks for the hard work John.

Really enjoyed this video and the previous one on micro subs. That's a piece of hardware that I'd not considered before so it was very useful.

Thought #11 - Why I'd like an active microsub with a pair of streaming loudspeakers: my family members at home, who have no idea about anything audiophile, prefer fewer units, fewer wires, smaller footprint, and thus a cleaner room aesthetic. Also, the setup should be easy for them (beginners/not tech savvy) to play music when they want to.

Great format, John! Not too long, not too short, and addressed some interesting issues about subs. BTW, I am a fan of the 2.2 audio setup; it sort of carries over from my 5.2 home theater setup. From the listening position, it sounds more balanced, and just a lot easier to set up. I do like your attitude towards audio and tech in general.

Enjoyed this one Immensely

Love it!

Great video!

Love this format. I rarely have time to read the comments but this gives me a good idea what people are thinking

I enjoyed this video. I look forward to you doing it again.

It’s nice to see a reviewer taking the time to respond to reader’s comments. Nice gesture

Love this vid content. Both the drift away from product specifics and the response to comments. I watch your vids and dream of being able to afford some of the featured kit, but this gives me info and inspiration I can apply to my own more modest equipment. Result! 😀

Hi John, Great pair of films. I have 2 SVS Micro's and use them with a Michi X3 amplifier (no bass Management). They supplement a pair of B&W 705 s2 signatures. It works well and its so easy to set both subs up with the app, without this it would take days to do. As the amp has no bass management the people at SVS advise setting a manual crossover of between 50 and 60 hz within the SVS software (I went for 55hz in the middle). They both seem to blend very well and sometimes I have to switch them off to convince myself the speakers aren't handling everything. I had several questions re the subs, so I contacted SVS service via e mail several times. I cant praise them enough, they responded within hours (I live in France) and their replies were very informative, allowing me to set up the subs with ease. They reply personally and seem really interested in your issues and cant help you enough. Anyway, good luck if you choose to do a 2 sub set up review, as I say it works for me with no bass management, it maybe a little more involved with, but who knows. cheers, Greg.

Excellent format change today

I just bought SVS 3000 Micro after your review and OMG... I had a huge problem with room modes that my Yamaha's room corretion could not fix (50Hz booming like crazy). With this SUB I can enjoy music again... amazig, so much options and flexibility in such a small enclosure. Plus for people living with animals, cat's especially: grills on SVS are bulletproof :)

Excellent video - you are now easily my favourite Hi Fi channel. One thing - as a music producer (amateur) I do find some of the audiophile issues raised either in the videos or comments odd/unusual…some of the things people care about/believe to be accurate/matter bear no relation to how music is actually made/mixed/mastered.

Hello John, I really liked this Video. I do enjoy your videos for some years now and I agree on a lot of topics with you. HOWEVER, not on all topics (sorry). Seeing other people adding information towards your point of view added a nice layer of discussion. Regarding the REL subject for example: I am not a future-fi guy, I like fiddling around with my separates. So a comparison between the DSP-side of the force and the HI-LEVEL side would be a very nice addition for me. Thanks for the entertainment and keep on rocking!

Fantastic video as usual! Really appreciate the situational centric theme of your videos as opposed to product focused ones! These days, all products are competent. Rather, what matters is which one is right for a given person's circumstances!

This was a great video and much appreciated. Looking forward to the marantz review.

Nice work John. I really liked this Q&A style video. Good mix of variety and details. I imagine a lot less B roll footage too but just as interesting to watch for me. I know you said in the last video you wouldn’t do a how to video on REW and room correction but I think it’d be great. Instead of us having to wade through all the technical audiophile details, you and Olaf could bring an easy to understand version to the masses! Anyway, just an idea. Keep up the good work. Cheers

Intresting! 5ms: human hearing is is very sensitive to the start of a pulse (thats why High Res works). Its wise to delay your main speakers, if possible. It will lock the bass in place, and will even effect depth of sound stage. REL: High inputs are interesting, because they copy the flavor of the main amplifier. disadvantage: especially by tubeamps is the low dampingfactor (flubby bass) or the early rolloff.

This interaction with the comments is much appreciated. Not sure a new video is needed after every video, but the interaction is appreciated. Always seemed to be a wall I the past. Glad to see you embrassing this more like other you tube channels.

Re the questions on KC62 Standby - I bought a KC62 recently and have had no issues to date with them automatically switching on, even at low volume. Looks like they fixed the issue, as you mentioned in your video (or maybe I've been lucky). Ps Your original video on the KC62 was a positive factor in buying one. Thanks

Regarding 5ms delay. We have two ears and one of the reasons for this is that we use the perceived delay in sound reaching each ear to determine the position of that sound. Consider then a recording of a bass guitar being played. It is quite likely that the bass guitar will play notes which activate the subwoofer and some will be above that range. It could follow that the lower notes from a bass guitar make it sound as if the artist has walked back two steps - not good. That's my take on it, if I'm wrong let me know.

@rolandrodgers5201

Жыл бұрын

Is this why there is an audio loop through on the SVS?

Love the video. More

Do another one. Enjoyed listening to it on the walk home from the station.

It was very interesting John please do it again. Having you address the comments in a holistic approach like that is wonderful for us subscribers. We know you're hearing us and considering our points of view.

+1 for REL. Now that you have entered the realm of subwoofer reviewing, i feel REL (for better or worse) is considered a critical reference point. They occupy a special place in sub-curious audiophiles minds because of perceived superiority in musical quality or ‘SQL’. A unique focus on their proprietary high level input connections (and it’s universal praise) adds to this mystique. Tackling a 2.2 setup is an excellent next step (and one I am very curious about), but for a 2 channel music focused audio reviewer, I would say a REL T7x should be your next stop.

Nice reflecting video. Regarding the high level on a REL, both the main speaker cables and the sub are connected to the speaker terminals on the amplifier. According to REL this provides better sub integration. Also, the reason to why I want your take on the REL is that I have heard many say that the REL provides a sensation in the room that makes low notes with low sound pressure level being audible. Whereas othe brands need the volume turned up to hear these low notes... To me this sounds outstanding. Hearing more from the record at lower volumes is a win! REL also use class A/B amps which would contribute the the sound. The design with an active woofer in the front and a passive downfiring woofer may be the key to the appreciated sound from a REL?

Good format

Lovely video

Really like the response vid. It can highlight areas that some of us may not have thought of.

Great video, as usual. Regarding your upcoming 2.2 project, I am currently doing that myself. In my case, I am using a third party external electronic all analog crossover from SPL (in Germany). I am using a pair of Amphion Two18 studio monitors as the main speakers, and a pair of Dynaodio 18s subwoofers. The Dynaudio subs have built in DSP which handles the issues of small box with large drivers. They also have a crossover, but you are able to turn off the crossover and use them as a plain sub but with the DSP giving you "flat" response in the small box. I did this because I don't want to put a sub-standard A/D, D/A section between my primary signal source and the main speakers. The all analog SPL crossover, with its 120 volt internal rails, is really quite excellent and improves my sound quality by removing the intermodulation distortion from the main speakers with their little 6 inch woofers. As you probably know, having two subs allows you to mitigate room modes more effectively than with a single sub due to energizing the room from two different locations rather than with a single location. You also can get away with less amplifier power and you push the subs less hard for the same output. I still have to deal with the delay from the DSP in the subs, but that actually works well in my setup, having them closer to my listening position. Expensive, but worth it to me.

This was fun and interesting.

ad 130Hz: my interpretation is that the original commenter wants to say there will be distortions from the main speaker woofers if you play loud signals with lower frequencies than twice their base frequency. "attempt to play f 70dBc" = attempt to play frequencies with less than twice the base frequency (lowest supported frequency of the main speaker) at levels greater than 70dB relative to the carrier signal. As an example, if you have main speakers that go down to 70Hz, you should not attempt to play loud signals below 140Hz on them, because they will introduce distortion on the higher frequencies the main speaker woofers also cover. It is better to let the sub handle those frequencies.

A 2.2 system, where you have your subs and mains placed, time delays, phase and polarities set property, is quite the experience. Your subs can soundstage the bass also. Bass drum kicks in the phantom center. Then the lows, can vary. Sometimes it's from the whole front wall enveloping you. Other times, depending on where they are placed in that track, can come from beyond the front wall and sometimes extend well outside of the mains and down the sides of the room. It took me a long time to get my subs right to get this, but once you do, it's magical.

John, awesome video and concept! Please do more of these on a routine basis. I would love to see these in addition to your normal video output. Admittedly, this could double your total video output. But perhaps you and Olaf could streamline the editing or whole production process for these comment videos so that it lightens the otherwise double workload. But I do think they are great because addressing our comments gives us viewers the sense that this is a two way conversation and not just one way, from you to us. Really terrific. Since I am commenting, I want to give a shout out to Jana and her great on location videos of interesting vendors and factories. You and your team are doing a great job. Please keep it up! Thanks from Chicago!

Very good video! You're absolutely right mate about kef connect app controlling the sub via the kef speakers. Despite me having Ls50 w2 and kc62, I'd still prefer to have a dedicated app for the KC62. This would also make the kc62 more viable to buyers who are only looking at buying the kc62 and not replacing the non kef speakers.

Appreciate the follow-up video on the comments John. I found the comments generally useful and went down some rabbit holes about what the "right" crossover should be for my setup. (Spoilers - I just left it at 80Hz and it seems fine). I've only had my KC62 a month so mine must be one of the "new" ones with updated firmware or something - the sub just wakes straight away and doesn't have any perceptible noise when waking or sleeping. Very happy with my system and a lot of that is thanks to your reviews John. My Yamaha amp gave up as the sound processing chip aged (known fault, but no replacement outside warranty) so I picked up an NAD M10 V2 and the KC62 to give my original KEF LS50 speakers new life. I really recommend paying the extra to upgrade to the full version of Dirac Live and taking a few tightly controlled measurements from the listening position. I've created a curve with a little lift in the bass and a little lift on the highs that seems to bring new life and clarity to my LS50s and the bass feels weighty, but not shake the room boom.

I recently bought a REL T9X. Initially I was skeptical of the high-level input. After using it for a few weeks, I'm sold. It sounds fantastic with my Sonus Faber Lumina IIIs. The speakers and the sub both connect to the amplifier speaker outputs. The REL connects via bare wire at the amp end and a Speakon connector at the sub. I terminated mine with ring terminals so they snug up nicely under the connectors. A big advantage of using the high level connection is your amp doesn't need a pre-out. In my case I have a 15-year-old PrimaLuna integrated amp and there is no volume-controlled output. So for me the REL has a huge advantage. Finally I think the high-level input provides a more natural sound, as it's the exact same signal going to your speakers. It provides a holistic sound that matches your speakers. The REL is expensive but I think it's worth the extra cost. I've actually been considering a second one ... talk me out of it please!

@bjwal6

2 жыл бұрын

Cheaper than kc62…

@SpenceW

2 жыл бұрын

I have two T9i and love them, but I have a very ‘unfriendly’ room in terms of potential sub placement options - one immediately to the right of the listening position & one forward of the speakers by the left wall are the only options. Adding a second sub really does make it impossible to localise the bass, unlike having only a single sub in my listening space. If you’re going to add a second sub, you could consider selling off your current T9 and buying two T7x - if a single T9 is giving you all the volume you need, you may find that you need to turn a pair down to very low volume levels, which limits the range of adjustment, based on my experience. Just a thought…

Very interesting to hear that DSP introduces delay, as a drummer I’ve been able to distinguish minuscule time alignment differences ESPECIALLY in the bass region. I’m eager to test this for myself!

This one is worth 2 likes, John. I would like to see more of these videos. It allows us to learn more about the product on something you may have touched on but viewers might like to know more about. For instance, how you might apply the voicings on the Lyngdorf to different types of music, or even tv/movies.

How cool on this take. I have the REL T5X as well. I did want the KEF but cost was over might limit and with Tekton Lors as my main speaker would not have had the advantages the Kef has.

Thank you John for the excellent content....I'm not (yet) into electronic music. I do find myself turning up the music between segments because it sounds so good....Thanks to your insights, I am considering the M10V2 and the Lyngdorf 1120....I would be using either with the hdmi input from my TV. Would adjusting the delay of the mains to match the sub (Micro 3000) cause sync issues with the video? If so, how noticeable would leaving the sub 4-5 ms behind the mains and TV be?

I have built a studio with large amounts of room treatment (whole walls and ceiling), as specified by a professional who designed the room and system. I am running two subwoofers, as that does create a more even bass frequency. The cross over point is at 180hz if memory serves correct (rather high) as it helps compensate for the thin desk, floor and some other problems. The subwoofers are aligned perfectly with the 3 way main monitors ( they are on top of the subs with stands) and everything is aligned with a laser measurement. DSP is used to manage the sub and mains, plus any phase issues because there is a slight delay in the sub, and final for EQ. Just thought you might appreciate knowing what I ended getting amazing results with. Not exactly living room friendly though…

Yes, do this format again. I'm actually getting close to purchasing the Model 40n, so I'm extremely interested to see the comment video.

John, thanks a lot for this! Looking forward for next review of Marantz. I hope there will be comparison with Lyngdorf in the review.

Great video and I appreciate you reading to the comments.

It would be cool to see how one (or 2) of wireless subs would work and where they might be placed.

To the 130 Hz resonance frequency comment of M Zrull. (I think)The end means: That the IMD / non-LTI distortions happen, when the main speakers have to produce soundwaves from f0 (their -3db point in the frequency response, lets assume 50Hz) up to 2 x f0 (so from 50hz to 100hz). Not sure what is meant with the "above 70 dBc" (maybe a minus slipped there and it means that they are in the range of -70dbc (so 70 db below the main signal(but that is a very low compared to the signal). please correct me if i am wrong

@pim_kahlert

2 жыл бұрын

Above 70dBc is about actual loudness. And since A-weighted loudness filters out most of the bass, house shaking bass levels would still not be registered as "loud" by an "a-weighted" measurement. dBc is linear to near 30Hz. SO, above 70dBc = above 70dB. For a 80Hz signal, we de absolutely not perceive 70dB as loud! However, the cone excursion required for a 5" driver (regular for bookshelves) will require some excursion. This excursion usually results in distortion, especially "InterModulationDistortion". Which, in contrast to harmonic distortion, the ear actually pretty good at detecting. This is the most important reason why loudspeakers sound better in the midrange when combined with a subwoofer, IF they have a decent high-pass filter!

A 2.2 review/discussion would be interesting. But so would adding a REL to the micro sub discussion. How about both (said the guy that doesn’t have to do the work)? Like you, many of us recognize that subs and systems are audio furniture. So the appeal of these small subs is considerable. Thanks John. Really enjoyable.

Darko - this format was cool

Regarding the 5 ms delay, it’s not about “late” bass or latency. It’s about phase coherence in the crossover region. 5 ms can delay bass notes a quarter wavelength or more, which means turning the phase 90 degrees or more. This affects the cancelation and summing of the bass in the crossover region. This is very audible. In fact, REW has a built-in feature for this very purpose that lets you record the sub response and speaker response separately, then sum them in the software and align the phase and FR visually. Then you get a number, say 17 ms, that will give you perfect phase alignment. Here, it very much matters if you already have the 5 ms built in to the sub. Furthermore, there’s a concept in acoustics called group delay, which is like a frequency response graph, but instead it tells you how much each frequency is delayed in time. The goal, of course, is for all frequencies to be zero (leaving the speaker at the same time). This is called linear phase. But this is not possible in reality. Even the best tuned active systems will have rising group delay in the bass. But this doesn’t matter so much, since bass is not perceived like “normal” directional waves, but rather as pressure changes over larger regions of a room. So a 30 Hz tone, for instance, is not perceived with a definite pulse start. 5 or 10 ms “late bass” doesn’t matter to perception, as long as the phase response is coherent (linear phase). In other words, group delay always rises in the bass, and that’s imperceptible, so long as there aren’t phase issues happening at the crossover region.

What I have discovered with a good sub if you listen to music is the room. The recording room that stands out more. All small low sounds that are normally not heard. It feels like room information is getting bigger. With a pair of good floor speakers then there is a lot of information in the lower registers, but a subwoofer amplifies it. Of course, assuming that you used a "live" room and recorded in. Just a little point of view that many people might not think about.

Dont know if someone mentioned this already but would be interesting to see the dSP in a sub taken even further, such as the Anthem room correction ok in a Martin Logan Dynamo sub. Yowza!

Damping factor has impact at driver resonance frequency. Delay and phase have a relation. Actually speaker crossovers cause delay. A fourth order crossover delays the signal full cycle (360 degrees, full wavelength). If a speaker has fourth order crossover at 200 Hz, the signal is delayed by 5 milliseconds. However, the signals of the drivers being crossed over are in phase related to each other but the impulse response of the speaker is spread over longer time. Human hearing is not very sensitive to delay especially on bass frequencies (except that skin sensation may be more sensitive to delay).

Cool video, I like the reactions. Makes it more of a group conversation that a one sided presentation. I own a kc62, I switched to the powernode because I didnt manage to intergrade it with the audiolab 6000a play. For me the bassmamagmemt/crossover was crusial. With the audiolab I tried to use the high lvl output on the sub back into the audiolab but I heard a hiss out of my speakers when doiing so. To bad I didnt get it to work because that would have been a great setup, and nice to take some low freq off the audiolab since it only had 50w. I also bought the wireless kit, for me the difference in sound is audible and it seems the base is cleaner / thighter sounding with the cable.

Nice. Q&A videos are great. Regarding the final point about the disconnect of opinion on active speaker designs vs active subwoofers, likely it's nothing more than familiarity. Hifi/Home theater subs have had plate amps on back for a LONG time, but only recently have full rage hifi speakers been implemented as such. Not only that, but everyone knows how crap most of those sub plate amps are as we've all had them fail. So, you can see the hesitation with accepting active speakers with what "must be" equally as crap plate amps onboard.