666 Chapter 22
Figure 22.13 : A wireless microphone system.
(Photo courtesy of Michael Pettersen of Shure, Inc.)One fi nal note with regard to wireless microphone systems distilled from years of
sad personal experience. The fi rst three rules for dealing with wireless microphone
systems are:
- Batteries.
- Batteries.
- Batteries!
Wireless transmitters are usually powered by 9-V batteries that may be composed from
primary or nonrechargeable cells or secondary cells that are rechargeable. Even if one
ordinarily uses rechargeable batteries, it is well to keep a fresh supply of nonrechargeable
units on hand. The histories of rechargeable batteries must be managed carefully in
order to assure their proper performance. Many practitioners prefer to employ only fresh
nonrechargeable batteries along with frequent replacement because of sad experiences with
rechargeable units. Battery failure at a critical moment can lead to years of bad dreams.
22.5 Microphone Connectors, Cables, and Phantom Power .........................................
It is almost universal practice in professional audio to provide signal sources with male
connectors and signal receivers with female connectors. Additionally, it is common