Manufacturer's Specifications
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Specifications

  
Manufactured by: Sherwood Electronic Laboratories, 4300 North California Avenue, Chicago 18, Illinois
Model: S-5500 S-5500ii S-5500iv
Year of manufacture: 1961-62 1963 1965-66
Price when new (in the USA): $149.50 (Flexitone case $5.00) $164.50 (Flexitone case $5.00) ($179.70 (case $7.50)
Description: integrated amplifier integrated amplifier integrated amplifier
Mono/stereo: stereo stereo stereo
Power output: 20 watts continuous per channel 36 watts per channel 40 watts per channel
Distortion: 0.5% at rated power 0.5% at rated power 0.5% at rated power
Intermodulation distortion: 1.5% at rated power 1.5% at rated power 1.5% at rated power
Frequency response: 20 - 20,000 cps ±0.5dB at rated power 20 - 20,000 cps ±0.5dB at rated power 20 - 20,000 cps ±0.5dB at rated power
Output impedance: 4, 8 and 16 4, 8 and 16 4, 8 and 16
Input sensitivity (for rated output): radio: 0.25V; phono 2.5mV tuner 0.25 mV; phono 1.8 mV; tape head 1.6 mV phono: 1.2mV
Hum and noise: -80dB (high level inputs); -60dB phono -60dB for phono 75dB below 1 watt output
Tubes: 4 x 7189; 5 x 12AX7/ECC83; 2 silicon rectifiers 4 x 7868; 5 x 12AX7; 4 silicon diodes 4 x 7868 Novar (output)
Dimensions: 14 x 12½ x 4 inches (356 x 318 x 102 mm) 14 x 12½ x 4 inches (356 x 318 x 102 mm) 14 x 12½ x 4 inches (356 x 318 x 102 mm)
Weight: 22 lbs (10 kg) less case 25 lbs (11.4kg) less cabinet 27 lbs (12.3 kg) less cabinet