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Solid-state integrated amplifier produced from 1968-1971, featuring 50 watts per channel into 8 ohms (60W into 4 ohms), direct-coupled design with simplified control layout emphasizing functionality over features. Marketed as the AR Amplifier, this model is notable for excellent sound quality and robust construction with minimal protective circuitry. Specifications include 20Hz-20kHz frequency response, 0.25% THD, damping factor of 40, and 2mV phono/200mV line sensitivity.

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Yahoo Auctions

# vacuum tube MT tube 55ps.@ together 6AQ5(A) 6AR5 6AU6 6AV6 6BA6 6BD6 6BE6 6X4 12AT7 12AU7 12AX7(A) 12BH7A 12BY7A 6E2 5MK9 ( boxed ) Yahoo Auctions Auction bid
¥4,600 Mar 20, 2026

Reverb

Vintage Acoustic Research AR Model AU Integrated Stereo Amplifier $349 Mar 7, 2026

Reverb

Vintage Acoustic Research AR Model AU Integrated Stereo Amplifier $349 Mar 7, 2026

Reverb

Vintage Acoustic Research AR Model AU Integrated Stereo Amplifier $349 Mar 7, 2026

Reverb

Vintage Acoustic Research AR Model AU Integrated Stereo Amplifier $229 Mar 7, 2026

Reverb

Vintage Acoustic Research AR FM Stereo Tuner AU $199 Mar 7, 2026

US Audio Mart

Gold Lion tubes for sale. 6 Gold Lion ECC82 / B749 / 12AU7, 2 Gold Lion U77 / 5AR4 New Production Re US Audio Mart $375 6% Mar 5, 2026

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