AOS PASSIVE PREAMPLIFIER PAVAROTTI

Second-hand, in good condition, it has some small scratches (see pictures). Without its original package.

Passive preamplifier
Passive preamplifier based on transformers with pure silver winding and 33-step switch with pure silver contacts installed on a 4mm vetronite support and brass structure. RCA Eizz connectors. Wiring with Mundorf silver teflon-coated solid core. Top level electronics.