pre standard two
this is a complementary-differential, no compromise preamplifier, aimed only at a best possible sound. Input devices are dual Toshiba JFETs, output Hitachi MOSFETs.
the design
preamp circuit is placed inside a box milled from 8mm thick Al plates, designed especially to protect against interference electromagnetic fields. Power supply space is separated from preamp space by a thick Al barrier. Special care was dedicated to clean power supply design.
rear view
the preamp completed
specs
THD spectrum
Pavel Macura - June 25, 2009; last modified October 4, 2009