StageGear Special Projects
StageGear Projects offering Lighting, Audio, and Video system, Design, Supply and Installation
Representing industry leading Sound Control brands and delivering exceptional expertise
in the field of Noise and Sound Control for Entertainment and Industry.
Drawmer SL22 -
Whether you need to protect your speakers, your hearing whilst listening to headphones or your premises license the Drawmer SL22 Sound Level Limiter is the perfect tool for the job. By eliminating the possibility of ’unauthorised’ excessive sound pressure levels it offers strict level control and tremendous peace of mind to users in three distinct areas:
Conform to Noise at Work Regulations by controlling user’s exposure to audio whilst at work to help prevent hearing damage.
Conform to Noise at Work Regulations by controlling the level of the dedicated headphone
output to prevent hearing damage to anyone wearing headphones on a regular basis
The precise calibration and volume controlling of the SL22 allows venues, such as clubs, theatres, pubs, schools, universities etc. to conform to Local Authority Noise Regulations.
The need to conform to Local Authority Regulations is absolutely imperative, none more so than in the area of noise control. Many products are on the market that claim to do the job but these often take the form of a crude switch, either turning off the power or disconnecting the speakers, both of which are very disruptive in any event. The SL22 is different, it controls the volume, but in a transparent, unobtrusive way, that you will struggle to notice. Not only is it responsive and versatile but does so in a secure manner meaning that tampering is extremely difficult. Other features include remote dimming of the volume, as well as the connection to a fire alarm system, reducing the volume automatically during a fire and allowing the alarm to be heard more clearly.
Prevents the damage to speaker chassis drivers and amplifier electronics by catching unwanted signals such as ‘bangs’ and ‘pops’
Whether in a large arena with a p.a. system and multiple speakers, or a bar or theatre,
there are few things more troublesome than blowing a speaker cone or amplifier electronics.
The SL22 has been specifically designed to transparently catch those unwanted SPL’s
and protect your gear. Not only will it save money by reducing the cost of speaker
repairs, but also reduce ’call-
The key features are as follows:
Limited speaker and headphone outputs
Once installed and calibrated completely eliminates the possibility of ’unauthorised’ volume levels
No sound quality loss even during protection processing
Large LED level indication for ’at a glance’ monitoring of signals and warnings
Time delay relays on outputs for clean power up/down
Fast, simple installation
A security label is supplied to further secure the calibration settings and show evidence of tampering
External control of Dim and Mute for connection to Fire Alarms or remote operation
Trigger output when in PROTECT mode
Logging inputs for both ALERT and PROTECT statuses
Benefiting from Drawmer’s 30 years involvement in designing industry standard dynamic processing devices, and especially the experience gained from its sister product, the popular SP2120 Speaker Protector, the SL22 has been designed to be more versatile and feature rich but at the same time just as easy to set up.
The SL22 front panel features an integral security plate to ensure that adjustments
to maximum volume levels are implemented by authorised personnel only. Once removed
two front panel pre-
To the rear the difference between the SL22 and the SP2120 is just as apparent. In its development we liaised with and were approached by local authority commissioners, installation specialists and venue owners who all advised and recommended attributes to suit their own specific requirements, the result being the addition many more versatile features that so many other sound level limiters lack. As well as the standard input and output XLRs (that can be securely locked using the optional tamperproof bracket) the SL22 also features a limited headphone output, that works in the same manner as the XLR’s, plus the ability to be controlled externally via a fire alarm or operator, and also connections to allow data logging of the SL22’s operation, or external visual indication via a light on a wall, for example.