I just picked up a IIb combo and since this is my first MB I am a hoping someone here can help me. The tubes have been replaced with a set of JJ's just because I was not sure and the past owner told me that he was told that they needed to be replaced. The main problem I have is that I really don't have any volume on the clean channel until the Master 1 volume is 3 or better. According to the manual this should be set at 2 initially with the Lead Master also at 2. With it set like this I have volume on the lead channel and next to nothing on the clean channel. The pull boost/gain seems to work fine though. Volume is anywhere from 7 or better (as per the manual). While running the Master 1 at 3 or more, the Lead master can be around 2 to have a lead boost. Also this amp came with a Celestial V30 and seems to get rather flubby at even slightly lower volumes. I have the bass turned to 2 or less and the mids down as well to try and control some of this. Any advice would be greatly appreciated, thanks.