Hi, I've recently started reconfiguring my bass amp setup, and I'm kind of unsure about how to proceed. I play upright, bass guitar, and synth bass pretty regularly. I haven't ever had to play all three during a single performance, but upright/electric and electric/synth comes up often. I currently use a two channel Acoustic Image Clarus series 4 as a bass head. I also have a Demeter VTBP-201S that I will typically run the electric through and then into the Clarus. The Clarus is a nice amplifier. I don't really like it as a bass guitar amp however. That's why I bring the Demeter along, but that kind of cancels out the benefit of having a small amp like the Clarus. I had thought to have a power amp installed in the Demeter, but I don't like playing upright or synth bass through the Demeter. I also have found that I need separate DI outputs, especially when playing upright. On the Clarus, when I shut off channel 2 (upright) it shuts off in my bass cab, but not through the DI. This has been a problem that I either have to solve by turning the volume down on the channel or using a volume pedal. It's a bit annoying. Anyway, what I was thinking was that I already have the Demeter preamp which I like, and maybe I could just get a rackmount power amp (since I'd be stuck with the rack format at that point anyways). If I then got an upright bass preamp/DI of whatever sort, could I just plug that and the Demeter into the power amp to combine the signals? I also would need some sort of preamp for the synth, but maybe there is a something that would work well for synth or upright? If anyone has tackled this sort of problem before, I would love to know how it might be dealt with. Thanks so much!