Son of Zen

Dear Sir, I am 55. I made two Son of Zen monoblocks in the summer of 1999, output power is approx 2x16W. I use XLR balanced inputs, driven by the Assemblage DAC-3 (24bt/96kHz) + Assemblage D2D-1 (upsampler). Last month I replaced input .stereo. weak potentiometers working as volume control by pairs of 12-position rotary switches with a collection of hi-precision resistors. The result is fantastic because of perfect symetry: now the quality of sound and space impression are much better than before. Please find few photos of an old .stereo.potentiometer. version, driven by Cambridge Audio (16bit). Kind Regards Andrzej Sochon Poland