is the click still of the same kind as in your earlier video? The last picture you posted shows that you may still be at risk of shorting various parts of the soldering job you made to the each other or the surrounding PCB. Could you add a piece of tape that helps prevent that?
gulesz However, if I use the preamp with its plugin power (Zoom H2) for the Soundman mics then I have a problem with a really small dynamic range on output.
what's the wiring here, exactly? Are you plugging the Soundman into the H2 then plugging the H2's output into Bela? I guess that may cause the inputs to clip, so you 'd need to turn down the PGA (programmable gain amplifier) for Bela's input channels. In a C++/Pd project this can be done from within the IDE, while for supercollider you have to add
s.options.pgaGainLeft = 0;
s.options.pgaGainRight = 0;
to the server options before booting the server. If this is not enough to remove the clipping distortion, you may have to further reduce the output level of the H2.