Hi, sorry in advance for the long post! I made several searches here and in other forums and already know that I will have to disconnect and reconnect everything in the pedalboard, trying one pedal at a time. Anyway, I didn't find a plausible cause to my problem and I fear to repeat the issue again and again. I just rearranged my pedalboard and tried it as usual with the passive side of my dual active/passive Valenti bass. Each of the pedals sounded great, no hiss, no strange noises. However, when I tried the active side, no sound came from the bass. Ok, time to change the battery, I guessed. After changing it with a new one, still no sound. The weirdest thing is that when I connect the bass straight to my amp (bass-cable- amp) or straight to my Scarlett interface, both active and passive sides of the bass sound perfectly fine, no issues. I've tried another active/passive bass, a G&L L-2500, achieving the very same weird behavior. A passive Fender Precision bass and a passive Fender Telecaster guitar sound thru the pedalboard no problem, so it seems like some interaction between the on-board active preamps and some of the pedals or the Voodoo Labs power unit is the culprit. As I said before, I found no references to issues similar to this on the internet, and have no idea about what to do differently when I rearrange the pedalboard. Also no new gear is being used in this situation, as the basses, amps, cables, pedals and power units have played fine with each other in the past. Any help will be appreciated!