I have spent many years (like most of you) cycling thru different gear looking for a sound that is at once clear to hear: pitch, intonation, rhythmic accuracy, punch/thump etc. and yet not unlike the actual instrument we play (realistic neuance). Toward that end I have ended up mixing a mic in with a piezo to get the best of both the piezo qualities and the mic qualities. Lately I have been thinking that with all the fancy preamps that are on the market there isn't one that is the ultimate Upright piezo preamp. We all have piezo's even if we rely on a mic or contact mic for a lot of the sound and though there are preamps out there that do a damn good job (Felix, Headway, etc.) they are all aimed at a wider group of instrumentalists and therefor have compromises that make them not perfect for upright bass using a piezo. So what would the perfect piezo preamp look like? Is it something like the ToneDexter that emulates a mic? Or could a preamp be made to really specifically address the upright bass's way of amplifying a piezo and tailoring to its needs. Here's what I would want in one based on what I have had or tried in different preamps, none of which has all the features on it's own: Variable Impedance Variable phase HPF filter and seperate Notch filter Tube presence/warmth quack centered eq - so that those quack frequencies can be rolled out easily and intuitively (although variable imp and phase go along way in that direction) a tuner built in. a DI What else? What would make the Ideal one channel URB piezo preamp?