A sound level limiter that can be used for a wide range of purposes, including protecting speakers, protecting hearing when listening with headphones, and complying with noise regulations.
By eliminating ""unauthorized"" excessive sound pressure levels, the SL22 provides precise level control and greater user peace of mind in three distinct areas.
Hearing Protection
Controls the level of the dedicated headphone output to protect the hearing of anyone who regularly wears headphones, such as DJs, recording studio sound engineers, and audiophile students. An additional connector on the back can be used for remote data logging or triggering external warning devices.
Regulatory Compliance
The SL22's precise calibration and volume control help venues such as clubs, theaters, pubs, schools, and universities comply with local noise regulations.
Compliance with local regulations is crucial. While many products on the market often take the form of a simple switch that turns off the power or disconnects the speaker, the SL22 is different. It controls volume in a transparent, unobtrusive way, providing natural operation. It does so in a secure manner that's not only responsive and versatile, but also extremely difficult to tamper with. Other features include remote volume adjustment and connection to a fire alarm system, allowing for automatic volume reduction and more prominent alarms in the event of a fire.
Protect Your Speakers
Prevents damage to speaker chassis, drivers, and amplifier electronics by capturing unwanted signals such as ""bangs"" and ""pops.""
Damage to speaker cones and amplifier electronics is essential in any venue. The SL22 is specially designed to transparently capture these unwanted SPLs and protect your gear once installation and calibration are complete.
Key Features
- Limited speaker/headphone output
- Suppresses ""unauthorized"" volume levels once installation and calibration are complete.
High-quality audio even during protection.
Large LED level display for at-a-glance monitoring of signals and warnings.
Time-delay relays on outputs for clean power-up/down.
Quick and easy installation.
An anti-tamper plate restricts access to settings.
A security label is provided to further protect calibration settings and provide evidence of tampering.
An anti-tamper bracket (sold separately) locks in the XLR for compliance with local regulations. External tuning and mute controls for connection to a fire alarm or remote control
Trigger output in PROTECT mode
Input logging for both ALERT and PROTECT states
Specifications
INPUT
Input Impedance: 20k Ohms
OUTPUT
Output Impedance: 100R
Headphone Output Impedance: 110R
Gain Range @ Output: -30dBu to +44dBu
Recommended Output Level: 0dBu
Crosstalk > 90dB at 10k Hz
Noise: -93.5dB (Unity gain / 22Hz-22kHz)
Power Requirements: 115V or 230V at 50-60Hz, 9VA
Fuse conforms to IEC 127-2.
230V = 63mA 115V=T125mA.
Dimensions 482mm(W) x 44mm(H) x190mm(D)
Weight 2.2kg
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