1 pair) 5U4GB RCA NOS 1972-1975 era

1 tube) 59/40 and 60/40

1 tube) 60/40 and 60/40

Recommended for

– SET amps
– Wright Sound SET
– Audio Note P4 Balanced mono amps
– Dared MCP7 preamp with phono
– Singlepower
– Modwright Transporter
– Donald North Audio