Vintage Stereo Amplifier from Soviet Union (Latvia) Manufacturer: Riga PO "Radiotehnika" In good condition. A product of the eighties. The amplifier has: Input selector for various program sources (electronic switcher) Operation switch (mono - stereo) Operational control switch for operation with two tape recorders Loudness off switch Smooth volume, stereo balance, bass and treble tone controls Output power indicator for each channel SPECS: Frequency response: 20 - 20000 Hz Frequency response unevenness in the range of 20-20000 Hz: ±1.5 dB Rated output power: 20W/4ohm Harmonic coefficient at frequencies 40-16000 Hz: 0.2% Rated input voltage of pickup inputs: 2 mV Rated input voltage of other inputs: 200mV Crosstalk between stereo channels at least at frequencies: 250Hz: 30dB 1000 Hz: 40 dB 10000 Hz: 30 dB Signal to weighted noise ratio: 83 dB Signal to background ratio: 60 dB Tone control limits at frequency: 100Hz: ±10dB (±3dB) 10000 Hz: ±8dB (±3dB) Average power consumption from the network: 80 W Amplifier dimensions (WxHxD): 430x90x375 mm Weight: 9 kg