In the past year I have had the left channel stop working on three separate sets of mics.
Did you ever get any recordings with any of these mics where the left channel was present? Yes. I recorded approximately 50 distinct performances with the mics before the left channel stopped working.
It could be that the connector is not entirely making contact there by defeating the left channel all together.
Have you tried and new mini plug cable. No, but I sent the mics back to Sound Professionals to get checked.
It could be bad wiring.
can you record the left channel with the internal mics on the M-10? Yes, and the next day I used my Core Sound HEB DPA 4061s -> battery box -> mic in with no problem.
have you tested the M-10 by sending any other line level signal into it, and confirming the left channel does indeed record? I have not checked the line in input yet.
does the left channel record but its distorted? this could still be a cabling issue. or not at all? No, it did not record at all.
good luck. Thank you.
--Ian
Sound Professionals just received the mics yesterday. I am hoping for a diagnosis soon. In the interim, glad I have another set of mics to use for the shows I have coming this weekend.
If you are using the battery box, why not go into the line in?
Try line in with any source. Output from computer, FM , old walkman, phone and see if left channel works.
it's entirely possible there is something wrong with mic in left or the jack, or it could be the mics or battery box.
Have you tried other plugs, or cables?
Try BB to line in , and also try other source and different cabling and plugs into line in.
There is no really likelihood that M-10 is damaging the mics, but there could be other failures involved.
--Ian