Impedance Matching Cable for Dynamic Mic Connection to G4 Transmitter??

[John Molli]

I'm ordering a Sennheiser G4 transmitter/receiver set-up. Will I need an impedance matching cable (Kopul?) if I want to plug my dynamic Rode Reporter mic into the transmitter? Or can I just use a regular XLR to 3.5mm cable?

[Rick Reineke]

You should get a SKP-100 plug on transmitter.
The SK-100 body pack Tx is unbalanced so you need to make or purchase a custom cable, preferably with a bias voltage blocking capacitor. The wiring would be;
XLR pin-2 to the 3.5mm plug's Tip terminal
XLR pins 1 and 3 to the plug's Ring and Sleeve terminals

[John Molli]

Thanks Rick. Is this cable from Kopul similar to what you suggested? Unfortunately, I can't find the pin-outs for it. Also, will that bias voltage damage a dynamic mic?

Kopul | Technology for Broadcast & Studio Applications')

[Christopher Young]

John. If you want a simple and efficient way of doing it follow your own suggestion of using a Kopul LMT100. This is exactly what these were designed for and the price isn't outlandish.

Chris Young

https://www.bhphotovideo.com/c/produ...2855/KBID/3801

[John Molli]

Thanks Chris, will the Kopul cable also block the bias voltage that Rick mentioned? If not could that voltage damage my Rode Reporter dynamic mic?

[Rick Reineke]

in some cases, bias current can produce noise.. I have never heard of it causing damage. OTOH, Phantom Pwr can fry a mic or other device through an unbalanced cable.

[John Molli]

Thanks to both of you for your help.

[Christopher Young]

+1 as Rick said!

Chris Young