So, not entirely long ago, I acquired a Thunderfunk TFB-550 (not b) from the classifieds, and I LOVE IT! It took alot of effort (okay, not really!) but I've managed to get an tone from it that I absolutely love. I started with a slight boost at 30hz, 400hz and 4khz, and then twiddled from there. What I'm trying to figure out now, is, how should I go about adding a little growl to it. Sometimes, I'd like to add a tone reminiscent of Mel Schacher from Grand Funk Railroad, or Les Claypool's version of Have a Cigar. That's an extreme example of what I'm looking for... in most instances, I'd want a scaled back version of that sound. What I'm wondering is, should I add a tube preamp, or get an OD pedal? Does it make sense to add a preamp in front of the Thunderfunk? Really, I only want to augment the tone I've achieved with the 'Funk, and not color it. (I want to make its existing color more VIVID without changing the hue, if you will.) I currently have a Sansamp BDDI, but it hasn't quite given me what I'm looking for. I find that when I crank the drive and play with a heavy attack, I get that overdriven sound at first, but then it fades off quickly. And the growl isn't really consistent across all of the strings. Perhaps I need to experiment with it more, but so far... not quite there. Doing my research on the forums here, I've shortlisted some options... Pre-amps: * Alembic F-1X (will this overdrive, or is it mainly a clean tone?) * Alembic F-2B (sounds like you can get a nice growl by cascading the channels) * Ampeg SVP-PRO (that's alot of tubes, my friend!) OD Pedals: * EHX English Muff'n * Homebrew Hematoma * Rocktron Silver Dragon * Fulltone Bassdrive * Homebrew Big D (no tube) * Robert Keely modified Boss Blues Driver BD-2 (also no tube) I dunno, I'm still new to this whole "nice gear" and "lots of toys" thing, so I'm hoping your collective knowledge will help. So many options, so little money/time! Any advice? Thanks! clay.