Stereo Preamplifier SPEC-3

A stereo hi-fi pre-amplifier with RCA inputs for Phono 1, Phono 2, Tuner, Aux 1 and Aux2, input/outputs for Tape 1 (RCA) and Tape 2 (RCA or DIN), and 2 RCA power amplifier outputs. Bass and Treble controls, switches for tone defeat, subsonic filter, cartridge loads, muting, tape copying and monitoring.

Specification
Semiconductors :   Transistors 29, Diodes 10
Equalizer amplifier 3-stage direct-coupled class A SEPP with 1st-stage                                                       differential amplifier
Control amplifier    3-stage direct-coupled with 1st-stage differential amplifier
Input (Sensitivity/Impedance)
  PHONO 1           2.5mV/100Ω, 10, 50, 100kΩ
  PHONO 2           2.5mV/100Ω, 10, 50, 100kΩ
  Cartridge Load PHONO 1, 2 100pF, 200pF, 300pF, 400pF
  TUNER              150mV/50kΩ
  AUX 1                150mV/50kΩ
  AUX 2                150mV/50kΩ
  TAPE PLAY 1     150mV/50kΩ
  TAPE PLAY 2     150mV/50kΩ
  TAPE PLAY 2 (DIN) 150mV/50kΩ
Output (Level/Impedance)
  TAPE REC 1      150mV
  TAPE REC 2      150mV
  TAPE REC 2 (DIN)  30mV/80kΩ
  OUTPUT 1, 2 (RL: 50kΩ)          
                           2V/600Ω
                           8V/600Ω (max.)
Total Harmonic Distortion (20Hz to 20kHz)
  PHONO             No more than 0.01% (2V output)
  TUNER, AUX, TAPE PLAY No more than 0.005% (2V output)
Frequency Response
  PHONO (RIA A Equalization)  20Hz to 20kHz ±0.2dB
  TUNER, AUX, TAPE PLAY     10Hz to 100kHz +0dB,-0.5dB
Hum and Noise (IHF, short-circuited, A Network)
  PHONO                 80dB
  TUNER, AUX, TAPE PLAY 100dB
Hum and Noise (DIN)
  PHONO                 69dB
  TUNER, AUX, TAPE PLAY 86dB
  MUTING               -20dB

Power Requirements
220/240V AC 50/60Hz switchable
Power consumption 15 watts

Same as the Pioneer C-73 Stereo Preamplifier (USA market).

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