The microcontroller in the limiter continuously measures the input signal and attenuates the output as much as necessary to keep the maximum sound pressure below a preset value. Because SPL limiters are not peak limiters, the dynamics of the music are not affected.
Both input sensitivity (threshold) and output attenuation (output level) can be set on the SPL2. All connectors and the controls can be sealed after installation, so they cannot be adjusted afterwards.
The SPL2TS is equipped with a built-in clock. This allows different sound pressure levels to be set for each part of the day. The built-in calendar supports up to 10 dates on which the limiter operates in "bypass" mode. All these settings can be set using the PC software.