Bride of Zen DIY preamplifier . My version of boz preamp . Selling as I mention on another auction , going now in vaccum tubes and this one just gathering dust . That is changed preamp as can see on pictures have separate boards ( psu + 2 channels ) , input capacitors changed to 3.3uf and output to 15uf , both polycarbonate type . That preamp can clip if have to high input ( cd / dac ) and I can recommend use transformers or buffer to change gain . Main transformer came from old sony amplifier .  Any question please ask .