I've been reading the thread on tweaking a Mesa 400+ and had some questions about my SVT IIpro. I play a Spector NS-2 with the US preamp and it seems that even with the 'pad' button in, I can't turn the gain past 9:00. I have my tube drive running about 9:00 as well, but it seems like I'm losing alot of volume because the clip light is lighting up. I've recently had it checked out, but it was just a standard music store tech doing. Is the something I can do with biasing? Preamp tube switch? (BTW I'm running it with an ampeg 8x10) At rehearsal I'm running my volume at about 2:00 and it seems like I should have more volume?