Sony XS-L122P5 Car Subwoofer "subwoofers flutter" Questions

low level noise causing sub flutter I have an 02 alero. I have installed vega subs and an amp. I have managed to get power and tunes but when the radio is at zero the subs have low level engine noise ...

i have 2 alpine r type 12's hooked up to a kicker crossover and a NRG 2200 800 watt amp. they are wired series and parallel. when i turn it up the subs sound like the are fluttering. what is going on.

one hits harder then other i have 2 12' 1200 watt xplod subs hooked up to a 750 watt amp. both subs are in 1 box hooked up the same and are the same sub, but one hits harder then the other any way i ...

I hv a Memphis 1100 watt mono block n a kicker 12" l7 try to get rid of the flutter or hum at low volume tried just about everything suggestions plzzz I once got a hum from running the rca and power ...