Rack Mount Stereo Pre-Amplifier (1976-1977)
The Spec-1 has differential amplifier circuitry incorporated in the equalisation and tone control amplifiers.
This is complemented by a dual positive and negative power supply system for all amplifier sections, which provides improved DC balance and stability, while eliminating click noises due to switching.
An electronic muting circuit, employing a reed relay, blocks surge noise associated with power switch operation.
Frequency response: 10Hz to 70kHz
Total harmonic distortion: 0.03%
Input sensitivity: 2.5mV (mic), 2.5mV (MM), 150mV (line)
Signal to noise ratio: 70dB (MM), 90dB (line)
Output: 150mV (line), 2V (Pre out)
Semiconductors: 50 x transistors, 33 x diodes
Dimensions: 480 x 186.5 x 365mm
Accessories: connecting cord, hex wrench
instruction/owners manual - Herbman1975
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Pioneer Pre Amplifiers