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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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Earlier on we used to have Audio mikes that used cables to transmit the audio signals. Long since these have been replaced with wireless or radio mikes that use frequency based transmission technology. They operate through radio waves and can transmit audio signals in FM, AM, UHF, VHF and various digital formats.
The advanced mikes are equipped to enable you to select a particular frequency band to transmit the signals from the mike so that it does not interfere with any other transmitter that can be operating on similar frequency. Coupled with this you are also able to use multiple microphones at the same time.
Nady Systems holds the honors of having built the first compander microphone that was built in 1976 and the current radio microphones owe their origin to him. He was honored with an Emmy award in 1996 for his contribution to the technology field.
Today wireless mikes have made it very easy and convenient for users to use while performing. Unlike the mikes with cables running all over the place, the wireless radio mikes are safer to operate.
The wireless Radio mikes have made it very comfortable and easy for performers to use. Today they are not hassled with having to drag cables across the stage and are able to move freely across the entire stage without being bothered. Even the handling staff need not bother with joining cables and managing the cables etc.
Though the Radio mikes are very good and advantageous to have, the draw back seems to be the fact that the two way radio batteries tend to get drained very fast and do not last long. The radio microphones guzzle power fast and in large amounts.
One other shortcoming could be the limited range within which the radio mikes operate. To get wider range you would have to buy higher models. There is also the risk of signals getting disrupted due to any other appliance or equipment operating within the same range.
You will often have to limit the number of microphones that you use, to ensure clarity and clear frequency without clash.
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