Ah, that's the very one I bought from the Girshin brothers who built it. The other pair of RCA sockets I fitted for output to a subwoofer, they after the volume control. I used it with 118db compression drivers and it was silent, maybe a valve is causing the hum. I used Sophia electric premium 6SN7 along with emission labs 300B and were the best sound ever.
Bakoon 13r Denon DP80 Stax UA-70 Shure Ultra 500 in a Martin Bastin body with jico stylus, project ds2 digital Rullit aero 8 field coils in tqwt speakers
Office system, DIY CSS fullrange speakers with aurum cantus G2 ribbons yulong dac Sony STR6055 receiver Jvc QL-A51 direct drive turntable, Leema sub. JVC Z4S cart is in the house
Garage system another Sony receiver, cassette deck
System components are subject to change without warning and at the discretion of the owner.