Crown Audio by Harman

Search:     Advanced search
Glossary



How do I make a CM-311AE or CM-312AE hard wired?

I've certainly enjoyed reading your articles in the trade press over the years. I just bought a CM-311AE without understanding that it wasn't fully terminated. I need a way to rig power to it so it can be used in a wired configuration. I could use a 9V battery.
John Etnier, Studio Dual

I have a CM-311AE headworn mic with a mini XLR connector. How can I use it with my DJ mixer?
Frederick Hart Entertainment

Reply: To run the CM-311AE or CM-312AE off a 9V battery, you need a 9V battery clip, a 1/4" mono phone plug , a 4.7 microfarad electroytic capacitor , and a Radio Shack 1/4"-jack-to-A3M XLR plug adapter/transformer (part no. 274-017). Frederick, remove the mini XLR connector. The wiring to convert a CM-311AE to hard-wired is shown below. Plug the phone plug into the Radio Shack adapter/transformer (impedance -matching adapter). Plug the XLR end of that adapter into your mic input with phantom power turned off.

 

In the diagram, you can replace the 9V battery with a 9V DC power supply. Many of these supplies are not filtered well to prevent hum . Here's a filter circuit you could add to the 9V DC supply to reduce its hum:

 

Others in this Category
document How do I prevent turn-on pops with the CM-311A?
document What are the pop filters for the CM-311A?
document How do I reduce breath pops with the CM-311AE?
document How do I fit the CM-311A or CM-311AE to my head?
document How do I convert a CM-311A to wireless?
document Where else can I attach the CM-311A beltpack?
document How do I wire a CM-311AE or CM-312AE to a Sennheiser Evolution transmitter?
document How do I reduce drum pickup with the CM-311A?
document How do I control boom bounce in the CM-311A?
document Should I run my CM-311A off phantom power, or use the battery in the beltpack?
document What's the difference between the CM-311AE and the CM-312AE?
document Should the CM-311AE distort?
document How can I protect the mic capsule in my CM-312A?
document How do I wire my CM-311AE or CM-312AE to a Mipro transmitter?
document Help choosing a headset microphone
document Compatible wireless systems for GLM-100E, CM-311AE or CM-312AE
document How do I prevent breath pops with the CM-311A?