The Pioneer Spec-2 is the most powerful amplifier Pioneer ever made. Introduced in '76, the Spec-2 delivered an absolutely unheard of 250 watts per channel. This specimen has evidence of its rack-mounted past, and is in top operating condition. Beautiful dual meters against a classic silver face, and fully serviced. This may be the one.
- Production
- 1976-80
- Condition
- 9/10
- Serial No.
- MH0359
- Orig. MSRP
- $899.95
- Restoration
- Full 30-point service check
- Replaced output driver transistors
- Replaced bias and drive resistors
- Cleaned controls, switches, and chassis
- Factory Specs
Type Solid-state power amplifier
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 18.9"W x 7.4"H x 17.5"D
Weight 54 lbs.
- Documentation
ON DECK Spec 2 Service Manual
- The History of Pioneer
- Pioneer was founded by Nozomu Matsumoto in 1938 in Tokyo as a radio and speaker repair shop. In December 1953 Mr. Nozomu Matsumoto succeeded in developing the first domestic dynamic speaker made of original parts. It was named A-8 and marketed in Japan under the Pioneer brand. It later became the origin of the HiFi ...
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- Liner Notes
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).
- Stock No.
- 7990790553821
The Pioneer Spec-2 is the most powerful amplifier Pioneer ever made. Introduced in '76, the Spec-2 delivered an absolutely unheard of 250 watts per channel. This specimen has evidence of its rack-mounted past, and is in top operating condition. Beautiful dual meters against a classic silver face, and fully serviced. This may be the one.
