On the subject of tube rolling, this was in my first post on Audiogon in 2003 ...
" As a final point, I have noticed that there is a lot of discussion about the merits of tube rolling with the 6SN7 output valve in the Cortese and Syrah. Personally, I think that Mick has carefully chosen the stock 6N8P (a 6SN7 equivalent) based on its sonic merits and there is no real need to replace the valve with another. I have in my collection the 6N8P and various 6SN7's including the black Ken Rads; black Brimars with red bases; Toshiba; Raytheons; Mullards and the Sylvania VT231. If I had to chose a favourite it would be the Sylvania VT231 because I find it the most transparent and the highs are sweetest(it can sometimes be a bit be microphonic though). I feel the Cortese and Syrahs are so inherently musical, that it does not make a huge difference swapping valves so long as the valve is nice and fresh, and not noisy to begin with. My advice on this is don't get anal about it, just enjoy the music! "
Having personally heard and seen seen Mick Maloney develop Supratek products since its inception around 1996, I know the guy to be meticulous in tuning each preamp on an oscilloscope to get them to sound the best before they are delivered to the customer. While this doesn't rule out tube swapping (it can be interesting and good fun) it probably does mean the preamps are optimally tuned when they leave the factory, so best to leave well enough alone.
Regards,
Steve M.
Western Australia
" As a final point, I have noticed that there is a lot of discussion about the merits of tube rolling with the 6SN7 output valve in the Cortese and Syrah. Personally, I think that Mick has carefully chosen the stock 6N8P (a 6SN7 equivalent) based on its sonic merits and there is no real need to replace the valve with another. I have in my collection the 6N8P and various 6SN7's including the black Ken Rads; black Brimars with red bases; Toshiba; Raytheons; Mullards and the Sylvania VT231. If I had to chose a favourite it would be the Sylvania VT231 because I find it the most transparent and the highs are sweetest(it can sometimes be a bit be microphonic though). I feel the Cortese and Syrahs are so inherently musical, that it does not make a huge difference swapping valves so long as the valve is nice and fresh, and not noisy to begin with. My advice on this is don't get anal about it, just enjoy the music! "
Having personally heard and seen seen Mick Maloney develop Supratek products since its inception around 1996, I know the guy to be meticulous in tuning each preamp on an oscilloscope to get them to sound the best before they are delivered to the customer. While this doesn't rule out tube swapping (it can be interesting and good fun) it probably does mean the preamps are optimally tuned when they leave the factory, so best to leave well enough alone.
Regards,
Steve M.
Western Australia