PA 880 runs on a high-speed MOSFET switching power supply & high current Bipolar Output Transistors pump maximum voltage and current to your speakers or subs.
Polk Audio PA D2000.2 is Polk Audio's new high-efficient digital 2-channel amplifier that runs more efficiently with lower distortion and cutting or clipping.
PA D5000.5 has the ability to bridge channels thus allow multiple wiring options & power handling ratings,giving you more options with the same about of quality
