Not sure if you could use a powerful 2 channel amp but I have a Rockford P650.2Budget is $150 - what have you got??
same model amp I just sold last week that you missed and I included a batcap...I have this: Alpine MRP-M650 class D mono amp
Class D mono subwoofer car amplifier
400 watts RMS x 1 at 4 ohms (600 watts RMS x 1 at 2 ohms)
Variable low-pass filter (50-200 Hz, 24 dB/octave)
Tuned Bass EQ (0-12 dB bass boost at 50 Hz)
Subsonic filter (24 dB at 15 Hz)
MOSFET power supply
STAR Topology (minimizes internal noise and prevents ground interference)
Speaker- and preamp-level inputs
Gold-plated screw terminals
Fuse rating: 30A x 2
12-13/16"W x 2-3/8"H x 9-9/16"D
I bought new at a local shop (Dedona) and used about 4 months. Been sitting in my condo since.
$150 shipped or are you close to me in NC? Maybe we can avoid the shipping part?