hey, i gotta quick question. i have a pioneer 12" 800 watt sub. i was wondering if i added another subwoofer but like a different brand with it. would it sound good still?

might?? if it's in the same box, sharing air...no! powered by the same amp, playing the same range of frequencies...probably not. My recommendation is to either get another sub the same as what you have, or sell what you have and get two of the one you want to add (if you've got a woody for that one).

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2004 300M SPECIAL
Alpine CDA 9833
Alpine Pxa-h701
Alpine Rux-c701
Rockford fosgate p400-4
Rockford fosgate p4004
Hifonics BX 1205D
JBL c608 GTi
JBL p693
Infinity 2.5" center channel
Alpine type R 12"(2)
all active SQL set up with 1900 watts rms

I'd say not a chance... .different subs, specs (xMax, sensitivity etc). Nope, do it right or leave it the way it is.

yea, its generally recommended that you don't mix subs

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Setup:
Panasonic CQ-C7301U HU
Infinity 6.5" fronts
Infinity 6x9 rears
Infinity Reference 12" Subs
Clarion DPX1800 900W Amp
Hardwired IPod
Escort X50 Radar Detector (blue)

Waiting To Be Installed:
Kenwood KAC-8452 4ch amp