DIY STEREO MIC-PREAMP for DSLR-Video - diyAudio
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Old 14th April 2012, 06:15 PM   #1
Salar is offline Salar  Germany
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Join Date: Feb 2006
Location: Germany
Default DIY STEREO MIC-PREAMP for DSLR-Video

Hi to all,
I know there are some preamps out there, but there is too many threads to follow...

What I am looking for is a simple stereo preamp which provides the following:

Balanced inputs
48V phantom power
The ability for monitoring with a headphone.
The output level of this amp does not have to be high:
0dB at -27dBu or 0.04 Volt are sufficient.

The backstory:
I would need this preamp with a Panasonic Lumix DMC-GH2.
This is a DSLR with very good video capabilities.

But if one wants to record audio professionally, youīll end up with bulky preamps (Sound Devices, SQN etc.) being as expensive than the camera and being three times heavier and larger.
But many DSLR like the GH-2 have already mic inputs implemented, so there is no need for high output levels from a field mixer (like +6dBu studio level) or peakmeters, as peak levels are superimposed on the camaraīs LCD.

I guess, with almost all phantom-powered mics it is just about making it a bit louder and adjustable in level -those cameras have adjustable gain, but it is very coarse.

Also many cameras donīt allow monitoring the audio while recording so a headphone amp as part of the mic preamp is needed.

Any thoughts on this, ideas and links?

Thanks a lot, all the best,
Salar

Last edited by Salar; 14th April 2012 at 06:35 PM.
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Old 18th April 2012, 12:14 AM   #2
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Join Date: Jan 2006
Location: Ireland
Buy a zoom H2, record using the built in mic of the camera as a guide track but use the high quality track from the H2 for the finished video...
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Old 18th April 2012, 07:01 AM   #3
Salar is offline Salar  Germany
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Join Date: Feb 2006
Location: Germany
I know this BS already. Donīt want to push two buttons while recording.
Donīt want to sync in post.
Please propose designs for mic-preamps only.
All the best
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Old 18th April 2012, 12:33 PM   #4
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Location: Ireland
Well good luck with your build and sorry for putting BS on your thread
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