Ive been using and enjoying my rig (a GK400rbiv and a Dr. Bass rx212) for about 8 months, and even though I have used it in many gigs and many gig situations, I have never had to push it very hard to get decent /more than enough volume. Last night I had an outdoor gig where the PA was a set of no-name 12" mains (with a horn) and nothing else. This would be the test! I turned the amp up farther then I ever have before (12 o'clock on input and main, 11:00 on boost) and gently tried my 5 stringer out. Whoa! I watched the speaker to see how badly they were "excursing" and realized I had not pushed this cab hard enough before to get any serious amount of performance. What I realised and hence the pupose of this post is, the tone really improved exponentially when I pushed it this hard (the speakers were moving well within what I felt was a safe range) and I got tones I never thought I could, really exceptional and full. I will probably not get the chance to push it this loud again for some time, is there some way I can get this kind of performance at lower volumes? Do I just need a 1-12 cab or a lower power rated cab to do this at lower volumes? Do cabs "break in" and warm up (at lower volumes) after you play them a while?