Never buy a wireless system that you cannot return (in new condition) to the dealer. You never know what is lurking in the airwaves where you will use it.
Be cautious of anyone who sells you a system without asking where you are using it.
Always tell the retailer if you have other wireless systems and their frequencies. If they are not sure what to do with that info, be careful.
Use extreme caution in buying a used wireless system from someone in a different area… odds are it won’t work for you, and the seller will likely dispute your claim and say it worked fine for him.
Never buy multiple wireless systems from anyone who is not capable of selecting frequencies that won’t harmonically interfere with each other.
If you buy mail order or via the web, always ensure they know better than to just grab one off the shelf at random.
Always save all packaging until you test the microphone and are sure you are going to keep it.
Tips for Wireless Use:
Always use fresh batteries. Alkaline batteries work best, but cost more money (Duracell, Energizer, Etc.). If you decide to use rechargeable batteries, please use only the highest quality available; the use of low-quality rechargeable is one of the top reasons for wireless system problems.Audio Technica At829Cw Cardioid Lapel Microphone For Wireless System
When a wireless microphone starts acting up, check the battery. They use a lot of power and can drain in a matter of 6-10 hours depending on the unit. If you leave it on, throw the battery away (proper disposal of course).
Always keep line-of-site to the wireless when ever possible and keep it as close as possible to the transmitter. As distance increases, signal strength fades.
Audio Technica At889Cw Behind The Ear Head Set Microphone For Wirless System4) Never hold a wireless handheld microphone against your body under your chin. First off, you are talking across the microphone instead of into the it, but more importantly you are absorbing all the RF from the microphone that is transmitted in the direction of your body (approx 180 degrees of the transmission). It is not harmful in any way to you, but blocks the transmission if your body is between the transmitter and the receiver. Keep the microphone out in front of your mouth and held parallel to the ground.
The same goes for body packs. Don’t tuck them away. Always wrap the cord around your body as far as you can and clip it on your belt. NEVER wad up the cord and shove it all in your pocket. You are sure to have trouble if you do. The human body absorbs RF, and that can lead to static and problems you don’t need.
For aerobics and applications where body sweat comes in contact with the body pack, wear the pack upside down so that no sweat gets into the wire or connector. Sweat is very corrosive and can ruin a cable or connector in a shorter time than you might think.