• WARNING: Tube/Valve amplifiers use potentially LETHAL HIGH VOLTAGES.
    Building, troubleshooting and testing of these amplifiers should only be
    performed by someone who is thoroughly familiar with
    the safety precautions around high voltages.

Mods Xiang Sheng 728A

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There was always something I didn't like about the sound of it, a sort of metallic distortion to the high frequencies, despite upgrading components, it still remained. I actually bought a newer version some time later, which sounded better, but preferred a clone Conrad Johnson pre amp that I bought afterwards.