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Sentry Music Noise Controller

formula sound sentry - music noise control
Sentry Music Noise Controller

Music Noise

  • Clubs, bars and entertainment venues
  • Dealing with complaints from local residents
  • Cuts the power when the sound levels are too high

The need for loud music in an entertainment venue can result in "noise" outside, which will not be appreciated by local residents. The most common way to control this noise problem is to install a Music Noise Controller, which will cut the power to the amplifier and related equipment when a preset sound level has been exceeded for a given period of time.

The Sentry usually connects between the electrical supply and the power outlet sockets that are to be used for the audio equipment. It can be used to simply control the signal to the speakers, should you not want to remove power from all the equipment, but the usual requirement is to install it in the mains power circuit, making it difficult to bypass.

music noise controller diagram

Using the Sentry

The Sentry is simply there to stop the DJ or live band from exceeding the specified limit. In normal use (sound level within limits!) the green lights will indicate the current level and there will be no intervention.

When the sound levels are too high, first the yellow and then the red indicators will show. If this happens briefly then the Sentry will ignore it. If the level is exceeded for 20 seconds (this default period is adjustable from 10 to 70 seconds) then the power to the audio equipment will be cut off and need to be manually reset.

For more details about installing the Sentry and setting up the level please visit the Installation page.

Main Options

The Sentry itself is for controlling low voltage systems. To control AC Power (110 to 240 VAC) you also need a Contactor. More info...

External Microphone
The Sentry has a microphone built in, but can accept a external microphone for a more flexible monitoring position. More info...

Remote Reset
After the Sentry cuts the power you need to press the red button to reset it. A remote reset button can make this more convenient. More info...


Music Noise Monitor and Controller
In stock
Contactor for Sentry Music Controller
In stock
More pricing information

Technical Support

For more detailed information about installation and wiring of the Sentry please visit our Technical Support web site.

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How to Buy

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Click the button or call 888-206-4377.

Purchase Order
Or by fax: 888-584-2230.

Information Request

Prices and Ordering

Sentry Music Noise Controller and its optional parts.

Order Code
Price (USD)
Music Noise Monitor and Controller
In stock
32 Amp Fused Contactor for Sentry Music Controller
In stock
External Microphone for Sentry with 30m / 100ft Cable
In stock
Push Button Remote Reset for Sentry Music Controller
Key Switch Remote Reset for Sentry Music Controller
Remote Display for Sentry Music Controller
7 Day timer for Sentry Music Controller
Reset Counter for Sentry Music Controller


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