Tube rolling suggestions for Unison Unico

I suggest you email Kevin Deal at Upscale Audio, I recently bought 3 different platinum pairs of 12AU7's for my Unico (I got the Mullards, the Radiotechniques, and the Siemens; I have yet to try them yet, I need to get speakers first to pair with the amp...) and he was very helpful in selecting them. Guessing from what he told me, you would like either the Mullards or the Siemens, but I would email him with what you're looking for and he'll point you in the right direction.

Hi Glitch,

Thanks. I have the Siemens from Upscale Audio, and they're not working out. That was the original problem. When I talked to Kevin, he said either the Mullards or the Radiotechniques would be good, but I don't want to choose randomly, and I'd really rather not throw down the capital for both.

What speakers are you thinking about? It really is a great amp.

I have done some searches on old threads on Audio Asylum where Mullards come up most often as the tubes of choice, a tad relaxed on top and glorious midrange. Similar to your experiences, I still have the Phillips stock tubes in my Unico, and simply haven't been able to convince myself to do tube rolling yet, as it just sounds so good. In my case I'm not sure I would want more relaxed top end... it is just right. I have visited Upscale Audio's website to explore... and really been thinking about the Siemens... interesting that they did not work out for you. How long did you leave them in, and did you leave the Unico turned on all the time? For me the difference in sound was nothing short of breath taking after about 36 hours on... and I haven't turned my Unico off ever since.