Crown Audio DCi Series – Network Input Models - Manual (Page 47)

DriveCore Install Network Series Power Amplifiers
page 47 Operation Manual
Advanced Operation
LevelMax™ Suite
This is a suite consisting of a peak voltage limiter, RMS power limiter, clip limiter and transducer thermal limiter. First you will set the mode to automatic or advanced: See
Figure 33
• Automatic mode: The software determines the best settings based on the signal characteristics. You can modify only the RMS threshold, Speaker Thermal threshold
and time constant. Everything else is set automatically.
• Advanced mode: You can modify the RMS threshold, Speaker Thermal threshold, time constant, Peak threshold and Peak/RMS release. Peak Voltage Limiter This
limits the peak voltage output ofthe amplifier.
• On: Enables or disables this function. You’ll set the parameters below:
• Threshold: Sets the level, in absolute voltage, which the limiter will allow from the amplifier. The range is from 1 Vpk to 255 Vpk.
• Attack Time: Sets the attack time of the limiter. The attack time is defined as the time it takes the limiter to attenuate the output signal by 20 dB. The range is from .1
millisecond to 100 milliseconds. The Instant setting attack time is instant (0 millisecond).
• Release Time: Sets the release time of the compressor. The release time is defined as the time it takes the limiter to increase the output signal by 20 dB. The range is
the same range as attack time above.
Transducer Thermal Limiter
This limits the long-term output power of the amplifier to what the loudspeaker load can handle without overheating and going into thermal compression. You can set the
voltage level at which the thermal limiter engages, the thermal response time and thermal voltage. Your loudspeaker manufacturer might be able to provide this information.
Meters show the amplifier output level in dBFS; and peak, RMS, and total gain reduction.
Figure 33