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Yamaha B-2

Power Amplifier (1978)

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Yamaha B-2


The Yamaha B-2 is the product of research directed at the ultimate in audio quality, based on a unique combination of sophisticated circuitry and advanced FET manufacturing know-how.

The B-2 joins the famous B-1 in setting the standards by which the 'state of the art' is judged.


Power output: 100 watts per channel into 8Ω (stereo)

Frequency response: 10Hz to 100kHz

Total harmonic distortion: 0.08%

Damping factor: 70

Input sensitivity: 0.775V

Signal to noise ratio: 115dB

Semiconductors: 12 x FET, 95 x transistors, 2 x IC, 66 x diodes

Dimensions: 436 x 370 x 151mm

Weight: 26kg


instruction/owners manual   English -

schematic   English - subsound

service manual (incomplete)  English - Cobra2

service bulletin 91   English - Cobra2

technical report   English - Cobra2

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