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In Reply to: RE: How many subs? and should I go from 5.1 to 7.1? posted by pbarach on March 07, 2010 at 10:55:20
1. As was mentioned, more subs can be used to smooth out the room response. It would be hard to justify in a room that size, where I'll guess floor space is already at a premium. Can be tricky to set up too, unless your AVR/etc. has separate sub channels that can be individually adjusted, but both subs being identical helps a lot.
2. I wouldn't recommend spending new $$ on it, but if you already have the gear... That said, I do miss it when the two back channels are silent, so I matrix them (PLIIx for Dolby, ES for DTS), they add some sonic fill (they're 8' behind me).
Of my couple hundred BDs, only 7 are 7.1, and 2 are 6.1. You know, even a lot of so-called 5.1 BDs (or DVDs) wouldn't sound much different if they were "3.0": almost all the sound is in the center channel with a bit of stuff such as music in the stereo channels, and no LFE to speak of (so the sub is only handling any redirected bass). One of my 7.1 BDs (a James Bond one) is essentially mono for all practical purposes...
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