Originally Posted by gurkey
The "correct/optimal" setup for the subs would be to have a setup of several of the same model. The input is mono already, thus for two subs you would need a maximum of two subs out for varying distance, corrected as one, which we got already, a third and fourth one would have to be aligned to either one for distance, delay and level. But three or even more subs is a vanishing small minority. There a more features of higher priority waiting in line before that...
PS.: Considering a DBA with a minimum of 4 subs we would just need a single sub out.
hi, the way audyssey works is it does indeed measure each sub individually... for it to happen it needs individual connections of each sub so can ping each...and apply level and delay to each.... its only pinged as once after that to apply the eq
read below from chris from audyssey re how xt32 and its multi sub capability works,
"The idea is to first measure each sub separately, then apply delay and level settings so that the two subs are now time and level aligned. Then we ping them once more as "one" sub to derive the room correction filter"
so having a system capable of dealing in multiple subs is crucial if running anything over one... and certainly very necessary for 2-3
as far as number of subs in a room, the below is THE definitive work on the matter conducted by harman,
as it concludes,
"Four subwoofers are enough to get the best result of any configuration tried. Two subwoofers is very nearly as good and has very good low frequency support as well."
"One subwoofer at each wall midpoint is the best in terms of Std, Max-ave and Max-min but does not support low frequencies particularly well. Two subwoofers, at opposing wall midpoints, performs very nearly as well as four at the midpoints and gives a much better LF factor. One subwoofer in each corner also has good low frequency support, but does not perform quite as well as one subwoofer at each wall midpoint, in terms of Std, Max-ave and Max-min. If cost and aesthetics are considered, subwoofers at 2 wall midpoints is preferred."
ofcourse running 2 or 4 subs what is critical is not only positioning which the white paper goes in some detail with. but also quite obviously dialing them in perfection which requires measurement and an EQ that is suitable. At end of it dolby has systems for in the home supporting upto 9.1.6 and while there is one LFE channel to optimise for rooms people will utilise more than the one channel. Adding more channels to processing capability certainly provides the option of connecting, measurement and eq to support e.g. as D&M has already done in years gone by. And similarly as shown even now accurus supporting with facility to cope with 3 subwoofers in a system.
I totally accept just like not everyone will go with 9 main channels and 6 height channels in systems, I also accept no everyone will go more 3-4 subs let alone even over one sub which is possibly more the norm. but buying into more expensive av processing systems is all about enabling greater capability and configurability. why else would people upgrade to them and am trying to look to the future and compelling reasons why we might possibly upgrade at some point in the future. greater subwoofer capability and continuing on the great system we have now to measure with calibrated mic and eq with a system capable of handling multiple subs as we have now is certainly one of them