i have an alpine mrv-100m, it's an old school v12 amp, it's missing a set screw that i replaced with a smaller slot head screw that works fine with a ring terminal on your speaker wire going to the sub...
straight outta the manual:
Power Output: RMS Continuous Power (at 12.0V, 20 Hz to 200 Hz)
Mono into 4 ohms ................................................................................................................. 100W (0.08% THD)
Mono into 2 ohms ................................................................................................................... 150W (0.3% THD)
Power Output: RMS Continuous Power (at 14.4V, 20 Hz to 200 Hz)
Mono into 4 ohms ................................................................................................................. 150W (0.08% THD)
Mono into 2 ohms ................................................................................................................... 200W (0.3% THD)
Max. Power (at 14.4V)
Mono into 4 ohms ...................................................................................................................................... 240W
Bridged into 2 ohms .................................................................................................................................. 300W