StageGear specialise in the supply and / or installation of sound limiters, our technical department can advise you on the appropriate unit for your venue.  If required we can carry out the installation for you.  Prices start from around £600 + VAT for a fully installed system, please contact our sales department for a quotation on any noise control equipment.

Wholesalers and Installers - If purchasing more than one unit ask for details of our quantity discounts.

Sound Limiter kit Options

SL2000 DIY Sound limiter kit      SL2000 DIY sound limiter kit.  Save installation Labour costs by fitting your own sound limiter.  Full kit includes SLC SL2000 sound limiter (see below for details), Isolating switch, 2 gang switched socket outlet, 5m of 6mm/sq twin & earth power cable, 100m microphone cable, 100m multicore cable for remote level indicator, Digital Sound Pressure Level meter and full instructions. (Always consult a competent electrician if you are unsure about electrical installtion regulations)

SL2000PP Plug and Play Sound limiter      SL2000 PP Plug and Play Sound Limiter.   Approved by Environmental Health Departments.  No professional installation required.  Simple DIY fitting or use as a portable unit.  Supplied complete with Digital Sound Pressure Level meter and full instructions.  Also comes complete with locking socket covers to prevent bypassing.

There are basically two types of sound limiter:

1.  Electronic sound level attenuation system
A unit which is connected between the mixer or sound source, a karaoke machine or CD player for example, and the main power amplifier.  The unit continually monitors the sound level and reduces the volume if a preset limit is exceeded.  This type of noise control system is only suitable if the sound system or at least the power amplifier is permanently installed in the venue.  An example of this type of unit is the AVC below.
 

FORMULA SOUND AVC The AVC performs as an intelligent volume control and in operation is very simple. If the average operating level is kept below the internally set threshold, the AVC has no effect. If the average programme level exceeds the threshold the unit will reduce its output level. The level is reduced in discreet steps indicated by the led. bar graph meter on the front panel of the unit. The action of the AVC is to fade between these steps and is almost undetectable in use. The more one tries to increase the volume, the more the AVC will decrease it so that the system will barely change in perceived level. If driven to maximum attenuation, the output level will be reduced by more than the increase in input level. The mixer or pre amp will probably be clipping, but the system will actually be at a lower than normal level. A clip indicator is provided to show when the input stage of the limiter is being over driven. Reducing the input level will gently release the attenuation provided by the AVC.
SPL2120  The SPL2120 front panel features an integral security lock to ensure that adjustments to maximum volume levels are implemented by key holders only. In unlocked mode two front panel pre-sets are exposed and available for adjustment. The first calibrates the 16 segment Left/Right bargraphs to the incoming audio and dictates the point at which protection processing commences. The second sets the absolute volume level to which the sound system is allowed to perform. If the SP2120 receives increased signal levels, the transparent protection circuitry is activated which maintains the specified system volume level without degradation in sound quality. Step 1: Insert key to unlock front panel and adjust VU meter pre-set until the peaks of the incoming audio illuminate the red endstop 0dB LEDs. Step 2: Adjust max output level pre-set until sound system volume reaches the maximum permitted SPL as specified by the installer, client or environmental Health Officer and remove key. Installed in only a few minutes this unit completely eliminates the possibility of unauthorised volume levels. No sound quality loss even during heavy protection processing. Housed in a 1U 19" rack mounting case.  Isolation transformer output option.

2.  Electronic sound monitoring and mains power switching unit
A sound limiter which monitors levels using a built in or external microphone. If a preset sound pressure level, usually set by the local environmental health officer, is exceeded for a certain period of time the mains power is disconnected from the sound source.  This type of sound limiter can be used in most situations but is the only viable solution when bands or mobile DJs use their own equipment.  If you own or manage a pub, bar, village hall or other establishment where live music is played you can safeguard your licence and avoid the possibility of large fines by ensuring that musicians plug their equipment into a power socket controlled by a device of this type.  This type of sound limiter will usually need to be fitted by a professional installer as mains voltage connections are involved.  SLC  supply and install several different models of sanction limiter, some are shown below.

SLC SL2000     -     OUR BEST SELLING SOUND LIMITER! Successfully installed in 1000s of venues, this unit has been designed by installers to overcome the drawbacks of other products.  The main control unit can be fitted at a convenient location out of sight.  The remote indicator and remote sound pickup microphone are connected using low voltage cable for ease of installation.   Simple to fit and operate, the SL2000 sound limiter offers the same features as more expensive systems and is local authority approved.  With fully automatic operation, 30 Amp switching capability and built in fire alarm interface this unit offers straightforward installation and adjustment at a low price.  Download Installation Manual
Formula Sound Sentry The Sentry works in conjunction with a relay or contactor (available separately)and usually controls mains power. But the Sentry is not limited to this function; any function that can be controlled by a relay or switch can be controlled by the Sentry. The Sentry has connectors provided to interface with a range of equipment, plus internally selectable options to make the system as versatile as possible. Although its main application is to control mains power outlets in entertainment venues it is not restricted to this application. Basically any function that can be controlled by a relay or switch can be controlled by the Sentry. These may include disconnecting loudspeakers, switching passive attenuators to reduce system volume or acting as the trigger into an active attenuator system. It is microphone driven and has its own microphone built in to minimise tampering. The Sentry also incorporates the facility to operate at two different sound level thresholds which may be selected manually, by a remote key switch or similar, or automatically by a time switch (switches not supplied). This allows a venue to operate at different levels at different periods of the day. e.g. when near offices or shops. An integral timer is available as a cost option.

Castle GA904 Electronic Orange The Castletech Electronic Orange Noise Controller is connected to the main power supply for the amplification equipment, the Electronic Orange flashes a warning when pre set sound levels are exceeded. If the operator doesn't turn down the sound within a pre-set time, an automatic cut off activates. The music never has to stop, because a warning light flashes if the limit is exceeded, and only when this is ignored does the power supply cut off to prevent further abuse.