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
The Spec-2 is a 250W rack mount stereo power amplifier featuring a current limiter circuit, peak level meters, protection circuit, power switch on/off and impedance selector muting and a temperature detector.
This high power design employs a cascaded differential amplifier first stage, push-pull drive, and darlington triple push-pull circuit with all stages direct coupled (OCL).
Power output: 250 watts per channel into 8Ω (stereo)
Frequency response: 5Hz to 80kHz
Total harmonic distortion: 0.1%
Damping factor: 50
Input sensitivity: 2V
Signal to noise ratio: 110dB
Speaker load impedance: 4Ω to 8Ω
Semiconductors: 55 x transistors, 75 x diodes
Dimensions: 480 x 186.5 x 445mm