Please contact me @ pmc0607@sbcglobal.net I'm thinking of buying
an SA 220 amp my preamp runs on a match quad set of RCA Red Base
5692 I believe witch is a 6SN7 and it sounds fenomenal .
an SA 220 amp my preamp runs on a match quad set of RCA Red Base
5692 I believe witch is a 6SN7 and it sounds fenomenal .