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The question is not about the overall group delay with multiple subs. The subwoofers need to be time-aligned amongst each to perfom as one unit for best in-room frequency response. And then, this unit has to be phase-aligned with the main signal (as crossover shifts phase, mere time-alignment...

A classic DIY design of mine. I have a surround system with passive cardoid floorstanders, four 12" subwoofers, Anti-Mode X2, etc. But to be honest, this is all one needs to listen to favourite music along with a glass of wine. Solid baffle, tilted stand, oiled oak.

There's a new firmware fixing the latency to 5.5 ms approx. in the 0.x modes. (In 2.1, it's still 7 ms approx. varying with individual filtering.) Will check and report.

Room correction demands for mono bass and a higher crossover, imaging for lower XO and / or stereo bass. But it's also a matter of filtering. 18 dB is the standard, but THX already had 24 dB (i.e. 12 dB on sats plus their natural roll-off). The Anti-Mode has fixed settings one has to deal with...

Yes, the DualCore got a bad review but is in fact from 2012. The X2 has been launched more recently. I haven't heard of any noise or transparency problems etc.

Yes, the Anti-Mode should be more capable by far, especially in the time domain. I would rather leave out the separate DAC here.

In fact, it's a Pioneer and I have to switch manually. But Denon offers automatic presets (or at least, they used to). Or just set the fronts to 40 Hz.

Then use another sub for LFE. Denon AVRs have separated bass management for surround and stereo. Surround: ESLs with their subs on small Stereo: ESLs on fullrange 2.0 (either original or actively crossed over). I have a similar layout. My floorstanders run in small at 80 Hz (same as the...

Then you why not go for 5.0 with two fullrange speakers?

I can't figure out that one. Why should you lose frequencues? Apart from this and as told earlier, let out BC. It doesn't help here except for the better filtering compared to standard Dirac. Two subs could also be handled before by almost any better AVR. BC now can handle 4 subs, but then...

There is no hint that the difference contains stereo bass. Bass Control is about improving the room response by using multiple subwoofers yet driven mono, otherwise it wouldn't work: https://www.dirac.com/live/bass-control Your usecase can be handled by standard fullrange stereo Dirac if you...

There are miniDSPs with Dirac and Bass Control, so no AVR needed.

Subwoofer channels are normally downmixed and summarized to mono in AVRs, while only delay and level is individual for each sub. This is the optimum at 80 Hz and lower, measuring the combined room response of all subs at your listening position. When crossed over higher, that downmix might...

Yes, sort of a D'Appolito, works well in my room.

Mostly, these systems do not crossover at 80 Hz, but higher. Then, stereo bass is recommended. The Denon AVR doesn't offer this from start and I doubt that it does with the DLBC. So, you will certainly need a 2x4 controller such as from miniDSP as well as two more piwer amp channels.

Hi folks, being an owner of a surround setup with fixed speaker placement, I have always searched for perfection in stereo music and accurate bass as well. Bass is in fact better as a surround setup is more flexible and controllable. I had ripole subwoofers for a long time, which were the best...

Does anybody happen to know the latency of the X2? My AVR struggles to measure the device and assumes a very unusual speaker distance of 9.00 meters, which is the maximum possible. By ear, I would say around 4 ms delay as adding 1.2 m to the physical distance of the subwoofers, the bass is the...

Thank you for your detailed answer. Roughly beyond 300 Hz, so I was referring to your initial design where the midwoofer took over at 250 Hz. 150 Hz is of course much better. Yes, I fully agree. Interesting, so I should give it a listen. Never cared about it this much. Yes, this demands for...

Hi, I was attracted to this thread by the initial design. As I built floorstanders with cardioid bass myself, I am wondering why you focus on cardioid in the midrange. Does it really have a noticible effect on FR and soundstage? Did you listen and measure with the lateral vents closed? It's...

Okay, that's a fair deal. Good to know. Yes, that's the idea behind an AVR even when firing a 7.1.2 or 7.1.4 system (the latter requiring a VSX-LX805). Any limitation would be acceptable for a low-budget AVR but not for a somehow bulky flagship model. I don't miss it as I never had the...