DPA preamp circuit

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szegedin

Well-known member
Joined
Feb 25, 2016
Messages
47
Hello -- I came her to post a question and saw that I posted that same question two years ago.
:eek:
Might as well try again.
Does anyone know anything about the circuit design for the current standard DPA microphones, which they sell as the MMP-A, and in a different design (and sound) smaller form MMP-C?

I read some commnent from someone in the know that it was "actually a pretty cheap" and mediocre design, and the MMP-A sells for $500 clams by itself, yet the mics sound extraordinary thanks to those B&K capsules.

Just wondering what they are strapping those 0v B&K electret capsules into. If anyone has any insight, would be glad to know.
 
Can't tell you what's actually inside DPA's, but i don't think you can go wrong with the good old Schoeps circuit. If you take the time to tweak the bias for the input JFET, it should work fine even with jellybean parts.

Actually wait - if memory serves, Zapnspark over on the micbuilders yahoo group, had an adapted Schoeps circuits especially for electrets - instead of an input JFET, one uses the one inside the capsule itself (if we're talking the small, 6-9mm diameter ones).
 
Cool thank you.
That modification would be over my head at the moment, but I guess I could learn it up and do it if motivated.

What do you mean by the one inside the capsule itself?
Would be interested to know of a good generic or kit/DIY preamp module for electret capsules.
Cheers.
 
A few examples:

https://upload.wikimedia.org/wikipedia/commons/thumb/5/57/Electret_condenser_microphone_schematic.png/220px-Electret_condenser_microphone_schematic.png

https://www.mouser.fi/ds/2/670/cmc-6015-47p-1154221.pdf


As for kits, not too sure about that, but the schematic would be this (with the alteration mentioned in my previous post):

http://www.scotthelmke.com/alice-schematic.jpg
 

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