HAFLER DH-200 STEREO POWER AMP AMPLIFIER. Working, excellent sound . MADE IN USA. Specifications Power output: 100 watts per channel into 8Ω (stereo) Frequency response: 10Hz to 40kHz Total harmonic distortion: 0.012% Damping factor: 50 Input sensitivity: 1.5V Signal to noise ratio: 100dB Semiconductors: 26 x transistors, 8 x MOSfet, 24 x diodes, 4 x zener diodes, 1 x diode bridge Dimensions: 5-1/8 x 16 x 10-1/2 inches Weight: 26lbs