Gee, I hope not since I run a Supratek Syrah pre to a Spectron Musician II. I don't think preamp tubes blow nearly as often as amp tubes. Mick from Supratek said tubes should last 10-12K hours-much longer than amp tubes.
I am using a Supratek Chardonnay and a PS Audio HCA-2. I love the combination and I tend to agree with Glen, I don't see what would be any different with a digital amp than with any solid state amp. But then again, what do I know.
Patrick, does your Syrah also use 5881/6L6GC's?
I was using Svetlana 6L6GC's and I switched to NOS Sylvania's, the difference was enormous. Mick said in his experience that the tubes in this position didn't make much difference, but not in my experience.
I have also just ordered NOS - GEC KT66's, original 6L6 can types, RCA and Sylvania 6L6G's and the topper, WE 350B's. I will let you know how they sound.
I am using NOS Ken Rad VT231's and 1952 Sylvania 6SN7's from Neville in Australia. They are both excellent.
I am also using a NOS Mullard 5AR4 for the rectifier.
From my experience so far, the NOS tubes have made a big difference over the stock tubes and I am excited about trying all of the 6L6 "family" that I just ordered.
Needless to say, I think this preamp is a killer. I don't see myself getting rid of it for a number of years. BTW, I had a lot of transformer hum from my Supratek, but it was obviously AC line induced. I purchased the AH! AC OffSet Killer and it is now quiet as a church mouse.
I would love to hear the Spectron some day, as I have heard great things.