Originally Posted by Blackmambakila
Yep, i just ran Audyssey again and it worked! I adjusted the gains on the back of each sub until audyssey set them both at 0dbs. Then i ran the whole process and saved it. Then i turned up the gains some since i had to turn them down so low and then i set both a little hot on the receiver. Only got to play a couple samples but sounded great! I think by tomorrow ill rotate the triaxes and put the towers in front then rerun Audyssey. Im starting my break this saturday and itll be a 9 day break now woohooooo! On christmas well have a windows laptop so soon ill having some measuring gear. Only thing that worries me is that the Triax on the right corner has a +6db output advantage over the one on the left due to placement. I wonder how I can make the most out of the 2nd one.
If you are setting them up based on results from different locations, then that is level matching. Gain matching is making sure drivers and amps are always being driven at the same levels between the two same subs. Here read this thread for clarification.
Since you turn the gains up on subs after aud., also turning up sub level in receiver, and then cranking movies up to reference level +, IMO you can take all the headroom you can get.
From Genelec Website:
When two or more subwoofers (except the 7050B as it does not have a sum output) are positioned close to one another mutual coupling is the fortunate by-product. This is due to the long wavelengths, associated with low frequencies, causing constructive superimposition. For mutual coupling, the subwoofers must be placed within ½ a wavelength of one another (85 Hz upper crossover frequency ½ wavelength is approximately 2 m). For example, two subwoofers give a 6 dB increase in acoustical output at the listening position
So its not just a simple +6 dB if stacked and +3 dB when separated. It is frequency wavelength based. Edited by Luke Kamp - 12/18/13 at 11:52pm