Two Subs?
Comments
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Agreed multiple subs properly placed and calibrated can effectively combat the excitation of room modes and smooth the bass response considerably.This subject has been heavily researched and documemted by the likes of Harmon and Geddes.
Two subs aren't for getting you "more sound" (unless they are benefitting from coupling, and you need the extra headroom), it gets you smoother sound. Multiple subs is about frequency response smoothing and combatting room nodes. And, no, the subs don't have to match, they just have to be level matched and crossed over similarly, which is pretty simple.
http://www.harman.com/EN-US/OurCompany/Innovation/Documents/White%20Papers/multsubs.pdf
http://mehlau.net/audio/multisub_geddes/
