The reference RF-OPT is NOT a physical article. It’s a line to add in your PO to indicate a special RF option for any article that integrates a cable (or a cable itself).
The RF option is the addition of:
- Special cable with hard braided shield (internally oiled for friction noise suppression)
- Metallic caps for all XLRs (male and female)
- Internal RF filter (chokes), generally in the female XLR.
A cable with RF option is strongly protected against interference (hiss and various noises) generated by the use of digital transmitters…but a “perfect” operation can never be guaranteed!
Faced with digital transmitters, some microphones do not even need this type of protection (Schoeps CMC1, Neumann KM184/185 and others), while others will remain unusable even with an oversized shielding (Schoeps CMC5, Neumann KM140/150 and others)
