Dual HF-12 (late 1950s)
Not much is documented about the Dual HF-12. The period record shows a mono integrated amplifier rated at 12 watts. It used a Williamson-type circuit, with the preamplifier and equalizer on board.
Audiocraft (August 1957, p.52) advertised it as a 12-watt Williamson-type integrated amplifier with a built-in preamplifier and equalizer. By late 1959, Audio (October 1959, p.16) still listed it in the amplifiers pages as a mono integrated amplifier rated at 12 watts, alongside Dual's larger mono integrated models — 50, 30, and 20 watts — which the ad suggested buying in pairs for stereo.
That is all that survives. The HF-12's exact production years, original price and detailed specifications are not documented.
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