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7.6. Output Limiters
High performance digital limiters are provided for each output with control over
attack time, release time and threshold level parameters (see Section 8.2, page
22). This level of control allows the user to balance the required subjective quality
of the limiter against the driver protection requirements. It also means that an
incorrectly set limiter may sound awful! In particular, as with all limiters, using too
fast an attack or release time will result in excessive low frequency distortion. In
‘design a crossover’ sub-menu there is an option for automatic limiter time
constants. In this mode the time constants will be automatically set from the High
pass filter frequency. See table below.
7.7. Table of automatic attack and release times.
The time constants are set by the high pass filter frequency for that channel.
High pass filter Auto attack time Release
<10Hz – 31Hz 45mS x16 (720mS)
31Hz – 63Hz 16mS x16 (256mS)
63Hz – 125Hz 8mS x16 (128mS)
125Hz – 250Hz 4mS x16 (64mS)
250Hz – 500Hz 2mS x16 (32mS)
500Hz - 1kHz 1mS x16 (16mS)
1kHz – 2kHz 0.5mS x16 (8mS)
2kHz – 22kHz 0.3mS x16 (4mS)