Hot-rodded Fender Silverface Twin Reverb. I rewired the redudant non-vibrato channel on this amp and added two tubes for four extra gain stages to create a lead channel. Also, photo-optical channel switching. In hindsight I don’t recommend cutting the metalwork on vintage amps and modifying them, however at the time it was a cool thing to do – it was great turining up to gigs and seeing the surprise on our rhythm guitarist’s face when this apparantly stock Fender amp amp produced immense, searing, saturated overdrive tones. The power tubes installed are vintage U.S.A. made JAN Philips/Sylvania military grade N.O.S. tubes and have exceptional low self-noise – quieter than any other 6L6 tubes by other manufacturers I’ve tried. I’d always thought that power tubes would not be critical for low noise in amp – you live and learn.