Used,like new - SA3 800.2 2ch Amplifier 
 
2-Channel 800 Watt High Efficiency Class A/B Design
2-ohm Stable (4-ohm in Bridged Mode)
PWM MOSFET Power Supply
Low Level RCA Input/Low Level RCA Pass Through Output
Remote Soft Delay Turn On/Off Circuit 
Variable High/Low Pass Electronic Crossover
Variable 18dB Bass Boost EQ @ 45 Hz
Variable Gain Control
Protection Circuit: Impedance Over-load, Speaker Short, Circuit, Thermal Overheating, and DC Output.
Wired Secondary Remote Gain Control (Optional PB-GAIN1)
Switchable Logo Back Lighting