I had recently bought a lavalier mic, Beyerdynamic MCE60. The link below is the specification:
http://goo.gl/Ok44This is an unbalanced MONO mic and has two separated GND wires as seen in the picture below. I have connected a 3.5 STEREO plug to this mic, because I could not get a 3.5 mono plug. Thus I've joined the cold pin and GND pin at the plug with solder to make the stereo plug into a mono one.
It worked OK, except for one problem: The volume is significantly lower than other MCE60 mics which I'd been using for about a year. A brand-new mic which is worse than a used product? I don't want to believe the brand-new one has any defect. I ordered this mic from overseas.
Now, I have two questions.
Firstly, when I joined the cold pin and GND pin at the plug, I melted quite a lot of solder between the pins and then joined the GND wire of the mic. Now I'm wondering if this lot of solder can cause the volume loss.
Secondly, there are two separated GND wires at the mic as I've stated above. And the outer wire, beneath the black outer shield as seen in the picture above, does not seem to be connected with the head of the mic. So I'm wondering if it is correct to join the outer GND wire with the inner one.
My recording device is Korg MR-1 and I don't use a preamp.
http://www.korg.co.uk/products/digital_recording/mr/dr_mr1.aspSorry for my poor English and thank you for reading this.