The Cinema Grand Series II is a 5 channel amplifier, rated at 225 watts RMS @ 8 ohms, and 450 watts @ 4 ohms. This is the Architect's choice chassis, 17-inches wide versus the standard 19-inch component width. The Series II has been upgraded with a larger power supply (including a changeover to a toroidal transformer) over the previous model Cinema Grand. Amp is in fine working condition. Manual included. Original box. Please email me with any questions.