YPAO room correction for dual subs on a single sub output

[Telefunk]

I have a Yamaha r-n1000a which I am looking to add subwoofer(s) to my stereo bookshelf speaker setup. I'd like to add dual matching subwoofers, but the receiver only has a single subwoofer output. As I understand the YPAO speaker calibration bass management, it corrects for audible delay and phase from the placement of the subwoofer. I assume it can't correct two separate subwoofers on a single mono subwoofer output connector. Would I be better off with a single subwoofer? Is there a YPAO receiver that calibrates two individual subwoofers to integrate a system?

 

[Oddball]

You can use mini DSP and RWE to fix this and probably will align your subs better between themselves as well as with the rest of the speakers. However, it is a manual process, so requires some time and investment in UMIC 1 and mini-DSP. Not really familiar with other YPAO receivers, but there are many Dirac, Audy and ARC receivers that would do their best (whatever that is) to align multiple subs.

 

[DVDdoug]

Would I be better off with a single subwoofer?

More subs (different locations) are better because tend to even-out standing waves throughout the room.

In most cases, you are probably better-off with both subs working identically together and equally sharing the job of reproducing the bass. If you have several subs you probably don't need all the power of all of them at the same time.

I've got a pair of subs connected to the one sub-output on my AVR. (They are symmetrical on the bottom of my stereo "speaker stack". And really, the main reason I built two was for a balanced appearance.)

it corrects for audible delay and phase from the placement of the subwoofer. I assume it can't correct two separate subwoofers on a single mono subwoofer output connector.

You are unlikely to have a problem unless one sub is much closer to you than the other because bass wavelengths are long.

At the speed of sound you need about 30 feet to hear a delay or echo. So the delay itself isn't a problem. The (potential) problem is the side-effect... phase shift. At a half-wavelength the waves are 180 degrees out-ot-phase and they cancel. But both signals have to be equal to cancel completely and if one speaker is closer than the other, that won't be the case. Except in a room with standing waves, things get "complicated" and hard to predict... The wave from the farther speaker isn't much weaker.