B&K Components ST55.2 Stereo Power Amplifier * 55W RMS

The B&K ST55.2 is a 2-channel stereo power amplifier designed for high-fidelity audio, delivering 55 watts per channel into 8 ohms at 1 kHz with a total harmonic distortion (THD) of 0.09%. It features a frequency response of 5 Hz – 45 kHz, a damping factor of 100, and a compact, 23-lb chassis with 20-amp peak-to-peak current. 

Key Specifications for the B&K ST55.2:
Power Output: 55 watts per channel @ 8 ohms (1 kHz).
THD (S+N): 0.09% @ 1 kHz.
Frequency Response: 5 Hz – 45 kHz.
Input Sensitivity: 0.77 Volts.
Input Impedance: 33.2 k ohms.
Damping Factor: 100.
Current Capacity: 20 Amps (peak to peak).
Slew Rate: 14 V/
sec.
Signal-to-Noise Ratio (A-weighted): 95 dB.
Dimensions: 17" (W) x 12" (D) x 3.75" (H).
Weight: 23 lbs.
Power Consumption: 210 watts max. 

Note: The manual specifies that 4-ohm loads are not recommended for this model.