This is a "PRO" amp that is bridgeable and uses xlr or rca inputs. Puts out 350 watts bridged rms. Not audiophile grade but a good amp for bass shakers or a subwoofer. Has rack mounts and leds, etc. I bought this last week as "new" from E-bay. I don't think it was brand new but in very good shape. Original box and manual. Sell for $60 and shipping.