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I own a P300HD subwoofer built and sold by [the now defunct?] Cambridge Soundworks. After 12 years of use, the subwoofer will no longer power up. Looking at the input board, I see that one of the capacitors is smoked (C618). I'm seeking a schematic so that I can determine the value of C618...

As audiophiles, you may have run across the 25+ year old audio analyzers from Hewlett Packard known as the HP 8903B and HP 8903E. The HP 8903B contained both a low distortion audio source as well as a precision audio analyzer whereas the HP 8903E contained only the precision audio analyzer...

Hello all, I am new to the community and thought I'd run a question past the experts. I have an old set of N.E.A.R 50 me floor standing speakers, which I love. However, to my dismay, I recently experienced an annoying buzzing coming from the woofer of one of the speakers. After much...