Progress Hornsby

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About Progress Hornsby

  1. Purchased a used D-75 a few years ago and have been using this amp in 2 channel (stereo) mode ever since. Would like to use it in bridged/mono mode now and then but noticed the manual says to have it modified by a factory service center for bridged operation. I have a (dual/mono) switch on the back of the amp.....does this mean it has already been modified for bridged operation ?