Internally Miked Accordion Project (5 x WM-61A) - Page 2

jwheeler · 7th August 2012, 02:08 PM

Interesting, the bass side isn't picked up at all by my treble side microphone unit thing :S

Nigel Goodwin · 7th August 2012, 03:06 PM

Quote:

Originally Posted by jwheeler

Do you know why Bill Wall's Microphone circuit has transistors before the matched resistors?

To provide a lower impedance output, and a 'sort of' balanced output.

mickeymoose · 8th August 2012, 02:44 PM

I have not worked with mics in a closed space like this (pix in post #7), but I see 2 possible problems:
Is the WM61 capsule, even after mods, able to handle the SPL, which propably >120dBSPL
The spacing of the 3 mics in the treble keyboard side invites for serious lobing, and discolouration of the sound. The least I would do is test the setup with switcheable microphones, replacing the switched-off mic with a load to maintain the same level to do a compare. E

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7th August 2012, 02:08 PM	#11
jwheeler diyAudio Member Join Date: Aug 2012	Interesting, the bass side isn't picked up at all by my treble side microphone unit thing :S

8th August 2012, 02:44 PM	#13
mickeymoose diyAudio Member Join Date: Nov 2008	I have not worked with mics in a closed space like this (pix in post #7), but I see 2 possible problems: Is the WM61 capsule, even after mods, able to handle the SPL, which propably >120dBSPL The spacing of the 3 mics in the treble keyboard side invites for serious lobing, and discolouration of the sound. The least I would do is test the setup with switcheable microphones, replacing the switched-off mic with a load to maintain the same level to do a compare. E