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hey mark, any luck with the smd's? i had also thought about watch batteries, like you said. ultimately, i was unsure where everything should go to cut down on outer clutter/ tangled wires. also, with my last build (no smd's), i encountered audible artifacts when someone close by suddenly burst over the volume on stage. how can that be fixed?

No suggestions yet? I might have a theory for now.. when I chose the pair of capacitors (came in a pack of about 15-20 different kinds/ values) and when pairing the two, I noticed while the values matched, they were by different manufacturers and one was just slightly shorter in size. Can this be causing some kind of off-sync effect? You know how when you're mixing two signals closer (or further) apart in time? ... closer to describing it.

Hm.. Had a chance to fully test the mics/ bat box very close to the stage of a show.... Sounds GREAT and never peaked on the meter. Annoying problem is when people out of a quieter area suddenly scream out for 5 seconds, there is a sine sweep over the duration of said bursts.... anyone deal with this and know of a solution?

not quite sure on the wiring but when you have balanced, you have two signals and one is out of phase (red and white). then the circuit at the other end would have to use both signals to create a cleaner overall signal, in turn canceling out RF and other such interference.. hmm. sorry i can't contribute more.. EDIT: oops, correction... the two signals are the same, i think one signal is sent out of phase at the circuit end.

I, too would like to pursue using surface mount components, whether salvaged from decommissioned PCBs or new from manufacturers. I'm fairly new to this and electronics in general (recording engineering course is helping to thrust me into this area faster). I ordered 20 WM-60A's from digi-key yesterday and they'll be in my hands in a few days. Until then, I've only had experience with Radioshack electret capsules. As a result of many attempts and variable results, I'm feeling a bit more confident on soldering skills. SO... I'll be happy to help anyone on the same path, viceversa.. (oh, and not all the 20 capsules will be used for this project.. plan to use some of them for experimental drumkit miking.) My first post.