This is a great amp...........i have had my fun with it..............asking $150.00.............still have the box and manual...........
specs are.......

QX4150 Output Power:
4 ohm Mono 150 x 2
2 ohm Per Ch. 75 x 4
4 ohm Per Ch. 60 x 4
Adjustable Input Sensitivity Control
Selectable 90 or 125Hz, 12dB per octave,
front highpass crossover with defeat
Continuously variable, 12dB per octave,
30 to 600Hz rear highpass or lowpass crossover with defeat
Adjustable 0 to 15dB "twin t" 45Hz bass boost
Advanced Overload and Thermal Protection
Muting circuitry for soft turn-on and turn-off
Input Sensitivity Control
Gold plated high current power and speakers terminals
Separate front and rear adjustable input sensitivity controls
Separate LED indicators for power-on and protection
Dimensions, Chasis 13.86L x 8.50W x 2.00H
Dimensions, Overall 14.86L x 8.50W x 2.10H