Today, we're going to take a look at the Polk Audio 1 Channel Class-D Power Amplifier. Now, this is a Polk Marine Certified power amplifier. It's a super efficient Class-D design so it runs much cooler than conventional amps. It uses the high speed MOSFET switching power supply. Does have thermal DC offset, reverse DC voltage, and short circuit protection. Now, the variable low-pass filter on this… see more >