Audio Research Reference 75
A half-power version of ARC’s Reference 150, the 75Wpc Reference 75 uses four KT120 and two 6H30 tubes. Two front-panel VU meters double as adjustment meters for biasing each of the four KT120s. A relatively simple, straightforward circuit design enables short signal paths; high-quality output transformers offer 4 and 8 ohm taps, with a common ground. BJR noted lightning-fast transient articulation, superb detail resolution, and exceptional bass slam and authority. He bought the review sample. JA noted good measured performance, but advised against using the amp with speakers whose impedance drops significantly below the nominal value of the output-transformer tap.
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