Starting a new thread about this since I don't want to further derail the thread this discussion started in This thread. Based on the posts below by @jmlee I started researching the SansAmp Para Driver: ...and found that there are a lot of players here - including more DB players than I would have thought - who really like this unit. On a whim, I ordered one to see if I could use it to get some upper harmonics out of my dark-ish PJB Super Flightcase amp. It just came today and I'm sure I'll play with this a fair bit to learn how to use it, but my initial findings are: - It's got a really nice basic sound set flat. I never noticed what I would exactly call "piezo clunk" with the FC/SFC combination, but there has always been a bit of that artificial low end that I had to roll off with a HP filter. - I like it better so far through the regular input rather than into the effects return. There is still some Phil Jones magic in the preamp of that amp. - I have the V2 version, which has some features on it that the original doesn't: a "Rumble" switch, an "Air" switch, and a Blend knob. So far I've gotten the best results with all settings set flat and the rumble and air switches engaged, which enables me to forego the HP filter. I've been informed by @tech21nyc that the rumble filter was voiced for acoustic guitar and is likely too high for use with the double bass, but the ability to blend the original signal in with the affected signal seems to mitigate this and sounds nice at home. Obviously, lots of gig testing will be needed to flesh this out. Anyway, there is lots of testing still to go with this unit, but I thought it would be nice to get input from others who have used it for DB amplification and not derail the previous thread.