OK so I know its kind of an apples and oranges type of thing but... I recently purchased an Art Tube MP Studio for use as a PA preamp for acoustic guitar just so I could get something useable into my PA without hogging up a mic preamp channel. I tried it out in place of my Fender TBP-1 in my rig not really expecting much. Surprise! I like it more. All for 1/20th of the price. Granted, the Art Tube MP doesn't have nearly the features the TBP-1 has, but how many places do you really need to be able to EQ your sound? I never really liked the TBP-1's distortion anyway, and I never found myself taking advantage of the multiple outputs and crossover on the back. My rig: Conklin Groove Tools 5-string -> Acoustic Image Series II Focus -> Bag End D10BX-D Both of the preamps do a good job of adding some tube warmth and dirty funkiness to the sound. Without something up front the AI Amp sounds a bit sterile (I play double bass as well and its great for that though). The Art I have discovered sounds especially nice when pushed just to the edge of clipping. The TBP-1 maybe adds a touch more 'tubeyness' but really mucks up (and even drops the volume) of anything I'm playing on my low B string below the E. Even on higher notes I find I'm enjoying the sound of the Art better. Is there something I should consider before getting rid of my TBP-1? Has anyone else experienced the muddiness/lower volume of the really deep notes through this pre? Could this problem maybe be caused by shot tubes?