4-channel + Mono Digital Power Amplifier - Alpine - PDX-V9 The amp is an Alpine MRP-M500 mono block - they are wired parallel presenting a 2-ohm load. Power line and ground line are both 8GA, as followed, for the amp I'm using. When turned on and listening/feeling closely to the subs, they do put out sound (it's clear and crisp, but at a very very very low volume), but with two 10s, you should expect ...