Nice industrial look. Are the RCAs silver or nickel ? Is the unit grounded or can it be ?
charles
The RCA's are Cardas rhodium over silver over eutectic brass.
The ground from the 12 VDC power wall-wart PS is connected to a star ground point internally as are all audio grounds. The power jack is grounded to the chassis/rear-panel so the chassis should be at ground as well.