i keep the top on - have newver had a problem with tube life. here's a thought on tubes on the cheap - try some yugo el12ax7s. they are cheap and have a very transparent high end. very clean. i prefer them. i don't have the converted model (24/96). my unit has a standby switch. did they change this with the 24/96 upgrade?
CAL Alpha DAC - Cool Tubes?
This is a two part question. First, I recently purchased a CAL Alpha DAC with the 24/96 upgrade. I have found that I prefer the sound of a tube DAC and I am enjoying it very much. However, I've noticed that it is completely enclosed with no holes for ventilation and cooling. This is obviously by design, but I wonder if this is good for the tubes and internal components in general. I know that there are quite a few current and former owners out there and would welcome your comments. Second, I would appreciate any recommendations on tubes, tweaks, and such. I am currently running Mullards.
Thanks!
John
Thanks!
John