CROWN AUDIO PS-400 POWER AMPLIFIER, FULLY OPERATIONAL. SOME MARKINGS HERE AND THERE BUT VERY PRESENTABLE, THIS IS A VERY NICE AMP I WOULD KEEP IT BUT I JUST NEED TO DOWN SIZE, THE AMP HAS RCA INPUT CONNECTORS AND BARE WIRE STRIPS. THE ONLY DEFECT I NOTICED BOTH VOLUME KNOBS HAVE ROUGHNESS LIKE IF SOMEONE ACIDENTALY RAN IT AGANST SOME THING THAT WAS ROUGH BUT AMP IS VERY PRESENTABLE, HEVEY AMP SO SHIPPING FEES REFLECT SO THANK YOU