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Repairing a Shure 545?


I recently bought an older Shure 545 (4-pin Amphenol era) on eBay, and while it works, it sounds a bit of the dog with voice: a greatly diminished low end, and reminiscent of talking through a paper towel tube.

Given there's only three parts to the mic: cartridge, transformed and wiring, it seems eminently repairable (by me), but I have no idea what's wrong with it. So I'm looking for pointers, links or URIs of forums that might help me diagnose the trouble with microphone.

So if you could help, I'd be greatly appreciative!

Thanks, Charles

Help repairing these old microphones

Hi all, first post here, though I've lurked for quite a while now. I recently saved a handful of mics from the recycling bin, and need a wee bit of assistance with some of them.

Before I begin, I should mention that I am a semi-professional electronics repair tech and I do a lot of work on amps, synths, and recording gear, but not a lot of microphones.

First mic: Sennheiser MD421.

Repairing clipped audio?

Hello friends,

There is a small (less than one second) of clipped audio in a take I recorded with my band. I've been messing with the file in logic (experimenting with the multipressor, and sample editor, and EQ) and cannot seem to get anywhere.

Here is a 10 second clip that contains the damaged audio. Does anyone have advice for me? It was recorded on a zoom mini recorder and all I have is one track of the stereo wav file in logic.…

repairing clipped vocals


i got some vocal tracks which are a bit distorted on the louder parts. mostly only slight distortion, sometimes a bit more.
it's no digital clipping. the engineer told me it's because the singer was too close to the mic, so it seems the preamp clipped.

is there a way to "repair" the tracks, cause redoing them is no option.

i've tried to filter out the harsh frequencies and put a little chorus on the track and it helped a bit. is there another way to at least make the distortion less audible in the mix?