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quad ii

  1. jefferylhenr

    Quad II / 22 only getting output from “Yellow” channel

    I got this Quad set in a box. Went through everything and have both amp modules working and stable. Only getting sound out on the yellow channel. I can swap the yellow and blue and get good clean sound out of either Amp / channel so I know the amps are good. I know the mono / stereo buttons shut...
  2. KilgoreBass

    QUAD II Amp + QUAD QC II Preamp - "Unique" condition

    Looking for opinions on fair market value of a QUAD QC-II preamplifier and QUAD II monoblock amplifier in “unique” condition and obvious need of restoration. These are circa 1956 based on a QUAD Product Year/Serial Number Record form, posted at the Lenco turntable forum. The units were housed...
  3. vaathi

    Help needed with Quad II Classic Transformer loose stud problem.

    Hello all... I picked up a pair of Quad II (Original ones with Jones plugs) many moons ago. I have not turned them on yet. In the mean time I got lucky and picked up good looking Quad II classic in good shape with cage. One amp has full set of tubes and another one which has rust in the...
    • vaathi
    • Thread
    • audio research classic quad ii quad ii classic
    • Replies: 13
    • Forum: Tube Audio
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