Hi,
Build a small battery box, or search for microphone battery box using
google there are a few circuits showing how it works (see below).
>From the battery box the unbalanced output plugs into the FR2LE using XLR /
>Male plugs. NOT 1/4" TRS PLUGS -
If the line-input is used the output level will be far too low to be of use.
3V is a good figure for the latest ECM's, or 9V as detailed in the circuit
below:-
Here is a good example for a battery box:-
http://www.megalithia.com/elect/battbox.html
The battery box has ground, then left and right signal outputs.
Wire up 2 x XLR Male plugs.
Pin 1: Ground
Pin 2: Signal (here you take the left or right from the battery box)
Since I used a 3.5mm female socket, I wired a 3.5mm Plug to 2 x XLR Male Plugs
and
connected both pin 1 on the XLR to the ground, and left / right to pin 2 (HOT)
- leave COLD unconnected.
This I know works with my FR2-LE with a 3V and 9V battery box.
It also keeps the preamp enabled in the FR2-LE, using a 1/4" plug will cause
the FR2-LE to be in line-input mode which isnt what you want..
Hope this helps.
Kind Regards,
Mike.
--- In Manoj Kathe <> wrote:
>
> Hi evrybody, i m manoj . I m trying to make a binuaral head
> using ECMs. I would like to make stereo preamp. Can anyone help?
> I tried biasing the ECM with 1.5 TO 9V DC supply And recorded
> on my FR2LE with micpre full open . The sensivity is quite good but
> S/N ration is poor . i checkced using Yamahaa MSP5 monitors. also i
> noticed, with 9V supply sensitivity increased .
> CAn any help me in the process of evaluating the impedance ande noise figures
> Of my unit
>
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