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 p963
Infinity 2.5" center channel
Alpine type R 12"(2)
all active SQL set up with 2000 watts rms