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acoustic research

Wharfedale EVO4.4 Speaker
  1. J

    Acoustic Research Integrated Amplifier

    I have an AR amp from the 70's maybe, which has not been working. The power transistors had blown once before and I had got them replaced (with 2N3055s) by a repairer in Altamount Road, who did a very good job. He is no longer there. It worked good for maybe 15 years after that with no...