Radio Shack Realistic MPA-35 model number 32-2022 Solid State Public Address [PA] Amplifier 35w, 1978, made in Korea

 

Link: hifiengine | instruction/owners manual

Specifications
Power output: 35 watts into 8Ω (mono)
Frequency response: 150Hz to 12kHz
Total harmonic distortion: 1.5%
Input sensitivity: 1.5mV (mic), 3.5mV (MM), 150mV (line)
Signal to noise ratio: 60dB (mic), 60dB (MM), 65dB (line)
Speaker load impedance: 4Ω to 16Ω

Dimensions (WxHxD): 280 x 100 x 230mm
Weight: 5kg