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Craftsmen 500

Ultra Fidelity Audio Amplifier (1951)

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Craftsmen 500


Ultra-fidelity is a new concept in audio amplifier performance previously found only in the research laboratory.

With an ultra-fidelity amplifier, harmonic and other types of distortion either approach the point of vanishing or are truly negligible over the entire range from 20 to 20,000 cps.

In order to maintain excellence throughout this range, the complete frequency range of an ultra-fidelity amplifier must be considerably wider than the audio range.

The Craftsmen 500 amplifier now brings ultra-fidelity from the research laboratory to the home.


Power output: 15W into 8Ω (mono)

Frequency response: 5Hz to 100kHz

Total harmonic distortion: 0.1%

Damping factor: 32

Gain: 70 dB

Input sensitivity: 1.5V

Signal to noise ratio: 90dB

Speaker load impedance: 8Ω to 16Ω

Valve complement: 2 x 6SN7GTA, 2 x KT66, 5V4G

Dimensions: 8 x 13.5 x 7.5 inches

Weight: 25lbs

Year: 1951


installation and service instructions   English - karodimitrov

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