Scottie’s Workshop: Picked up this cruddy #marantz 1090 Built-in Amplifier on a budget. It appears to work however the auto disconnect preamplifier

Picked up this cruddy #marantz 1090 Built-in Amplifier on a budget. It appears to work however the auto disconnect preamplifier – amplifier RCA jacks are wonky. I could exchange them with commonplace gold plated RCA jacks and see what occurs. #audiophile