sfcd 1 best tubes

While I have not had a SFCD, I do own an SFP-1 signature. I have used the Siemens (70s vintage) gold pin and they have been the best I've tried--clear well defined and very open soundstage. I have not had the opportunity to use the Amperex, but given Jaguar's comments--I'd like to.

I've had a lot of listening hours in front of a buddy's SFCD-1 and tried more than a few tubes from my personal stash, but he was using some mid '60s US Amperex white label 6922 PQs to good effect. I sold a pair of my later production Siemens 7308s to another buddy and he's quite happy with these, although the presentation might be a bit more extended at the extremes vs. the more midrange pronounced Amperex tubes.

Chris

Tele$unken