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Author Topic: Reduce the voltage on the Mic-in plug  (Read 1375 times)

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Offline one8ung

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Reduce the voltage on the Mic-in plug
« on: October 30, 2019, 01:46:28 AM »
I want to do a dual recording with a Tascam DR-2d multitrack recorder.
Want to put a IEM pack in the Line-in and a microphone in the Mic-in.
Have tried it with Plug-in Power but that wasn't a succes.
Also with a Battery-Box I have a little interference.
Have read that you can use a DI-Box but I find that to big.
Is there an otherway to reduce the voltage on the Mic-in plug?
Mics: CA-11(c) - CA-11(o)

Power: A3

Recorders: (2x) Roland R-07 - Tascam DR-2d

Offline rumbleseat

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Re: Reduce the voltage on the Mic-in plug
« Reply #1 on: October 30, 2019, 11:13:24 PM »
I think there is a way to record separate stereo tracks from both the mic in and line in on the DR-2D, but could you please provide more details on what you've tried?
Which IEM unit are you using?  Which microphone(s) are you using?  Which battery box?
What does it mean that it "wasn't a success" with plug-in power?
What kind of interference did you experience with the battery box?

Sorry for so many questions!
AKG C480B CK61 cards or AKG C568EB or Church CA-11 cards >  Canare L-4E6S with Neutrik EMC > Tascam DR-680 MKII or DR-44WL > memories

Offline one8ung

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Re: Reduce the voltage on the Mic-in plug
« Reply #2 on: October 31, 2019, 12:24:56 AM »
I'm trying to record two separate stereo tracks.

Using a Sennheiser SK 2000 IEM receiver on the Line-In

This is how the recording turned out with Plug-In power running CA-11:
https://archive.org/details/krezip20191026amsterdam01

And this kind of interference do i get with the CA-11 into a A3 Adapter (Best audible on: 1:08):
https://archive.org/details/goldenearring20191029utrecht01
Mics: CA-11(c) - CA-11(o)

Power: A3

Recorders: (2x) Roland R-07 - Tascam DR-2d

Offline kuba e

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Re: Reduce the voltage on the Mic-in plug
« Reply #3 on: October 31, 2019, 12:19:58 PM »
Ït can be radio interference from IEM. It is difficult to say where the interference arises - it would be in microphones, battery box or in dr2d. You can try to find it by bringing the IEM closer to the individual components. And then you can try to solve this problem by placing IEM system far from the problematic component. But I do not know IEM, perhaps someone else will advise better.

Offline rumbleseat

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Re: Reduce the voltage on the Mic-in plug
« Reply #4 on: October 31, 2019, 04:04:19 PM »
I hear plain old distortion in both of those CA-11 recordings.  Your signature line says that you have a Church Audio Ugly Battery Box - that will give you 9 volts and should give you much better sound than the 6 volt A3 adapter or the Plug-in-Power from the DR-2d.   Put a fresh 9V battery in your UBB and give it a try into the Line-In.  If you need to have this go into the mic input, you might need an attenuator (or a CA preamp that can turn the output down).

As for the Sennheiser receiver, are you using an EK/SK 2000 transmitter and receiver pair?  What's plugged into the transmitter? 
AKG C480B CK61 cards or AKG C568EB or Church CA-11 cards >  Canare L-4E6S with Neutrik EMC > Tascam DR-680 MKII or DR-44WL > memories

Offline one8ung

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Re: Reduce the voltage on the Mic-in plug
« Reply #5 on: October 31, 2019, 05:08:24 PM »
My ugly battery box is broken maybe i can try it with the OKM mics
I also have read that i can use a DI-box to make the mic-in act like a line-in but i’m looking for a smaller cable to act like a DI-box.
« Last Edit: October 31, 2019, 05:26:10 PM by one8ung »
Mics: CA-11(c) - CA-11(o)

Power: A3

Recorders: (2x) Roland R-07 - Tascam DR-2d

Offline kuba e

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Re: Reduce the voltage on the Mic-in plug
« Reply #6 on: November 01, 2019, 10:39:07 AM »
Rumbleseat is right. If you don't properly power your microphones, you should start here.

I also have read that i can use a DI-box to make the mic-in act like a line-in but i’m looking for a smaller cable to act like a DI-box.

Mic-in can act as Line-in. Set the dr2d mic-in sensitivity to low gain and the recordings level to  62-67. Maybe there is little different impedance but I am using dr2d's line-in/mic-in with ubb/ca preamp without problems.

Offline one8ung

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Re: Reduce the voltage on the Mic-in plug
« Reply #7 on: November 20, 2019, 01:44:34 PM »
Rumbleseat is right. If you don't properly power your microphones, you should start here.

I also have read that i can use a DI-box to make the mic-in act like a line-in but i’m looking for a smaller cable to act like a DI-box.

Mic-in can act as Line-in. Set the dr2d mic-in sensitivity to low gain and the recordings level to  62-67. Maybe there is little different impedance but I am using dr2d's line-in/mic-in with ubb/ca preamp without problems.

The low gain setting did solve my problem!

Thanks for the help.
Mics: CA-11(c) - CA-11(o)

Power: A3

Recorders: (2x) Roland R-07 - Tascam DR-2d

 

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