I perfer like 2 1500.1 rf amp. Cause them amps don't need high volts. I have a 15"dd 9515g sub.my electric is mechman 225amp alt and d3100 under hood. Be goin In Altima, I need a amp befoe sbn. My Tahoe with 4 18s won't be done so I'm bring my car down. Tell me what u have?????