I have just finished setting my subs and i have 2x 10" and 2x12" subs jvs warren G's. these are all being powered by 2 jvc shaun palmer series amps and i was wondering if there was a way to increase the power or volatge from the stereo head unit. there was one guy who was telling me that you can buy a small unit you can put in between the RCA from the stereo to the subs to increase the voltage that way i do not increase the gain on the amps. the subs sound good but i know they should sound better. any input is most appreciated.