Wow, the ampeg svp-pro preamp is wonderful. I'm running it through my qsc rmx1450 poweramp and couldn't be happier. For what it is, the sansamp did a great job, but the power of real tubes is much more satisfying to the ears. For now I'm using the recommended 'rock' preset and it sounds great, really punchy and full. Still experimenting, but wanted to give it two thumbs up Who else runs a svp-pro/poweramp setup? How does it hold up in live situations? Thanks.