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The PDWM8700 is a wireless microphone systems supporting up to 8 channels, with 4 lavalier/headset mics and 4 handheld mics included. It’s equipped with 1/4" individual and mixed line outputs, so you can simplify the mixing process, or use your own mixer -- it's up to you. The wireless receiver is rack-mountable for easy integration into your rig. Compatible with four separate sets of wireless transmission frequencies, so you can use multiple PDWM8700s or other wireless microphone systems in your setup without worrying about interference. Dual telescoping antennas ensure quality wireless transmission, and on/off broadcasting switches allow you to easily manage all your wireless mics.
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They are more commonly know as radio mics or wireless mics, where the original audio cable is replaced by frequency transmitting technology. Radio mics can now transmit audio through radio waves in FM, AM, UHF, VHF and various digital formats.
More advanced models will allow you to select various frequencies to transmit over, helping avoid interference with other electrical transmitters that might be using the same frequency, and also enabling the use of multiple microphones at the same time.
It is thought that the primary radio microphones derived from the original compander microphone developed in 1976 by Nady Systems, who was honoured in 1996 with an Emmy award for his technical contribution to the technology field.
Radio Microphones - Plus Points
Using radio mics is very advantageous for the user. A starting advantage is that radio mics eliminate the health and safety risk of trailing microphone cables. Secondly, and as a result of this, you give the freedom of movement to the wearer of the microphone as they are not joined via a cable. Another plus point is that you no longer stress any cables by flexing them, which can frequently result in damage.
Disadvantages of Radio Microphones
Despite having such advantages, wireless microphones also have some select disadvantages. Firstly the two way radio batteries used do not always last very long as the radio microphones are very thirsty when it comes to power consumption. Radio mics are also hampered by range, with the furthest signals normally only achieved by the larger, more expensive models. Interference from another electrical appliance is also a possibility which would lead to a disruption of the signal. Finally, to avoid being on the same frequency and clashing, you are limited to the number of radio microphones you can use.
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