Odep Conservation; Smooth Output Limiter - Crown AMB-5 User Manual

IQ–MSD Turbo 1.4 Advanced IQ System Software
The various SmartAmp functions are listed next along with their parameters.

5.4.1 ODEP Conservation

ODEP Conservation enables the amplifier to automatically reduce its gain as the ODEP percentage rises. By
gradually reducing the gain before the thermodynamic headroom is exhausted, the amplifier can continue to
operate under severe conditions with very little, if any, change in fidelity.
ODEP Conservation is displayed as an instantaneous percentage of amplifier's total thermodynamic headroom.
Subtract the ODEP value from 100% to find the remaining thermodynamic headroom. When the value reaches
100%, the amplifier has reached its maximum capacity for its operating environment and ODEP limiting will begin.
This is explained more fully in amplifier Reference Manuals.
ODEP Conservation: Turns on/off this feature.
Trigger Level: Sets the point at which ODEP Conservation begins to affect the gain. For example, setting
Trigger Level to 60% causes the gain to be reduced by the amount specified by the Amount control when the
ODEP level exceeds 60%. The Trigger Level can be set from 1 to 100% in 1% steps.
Amount: The ODEP Conservation function reduces gain by adding input attenuation. The Amount control
determines the amount of attenuation (in dB) to add for every 1% that the ODEP level rises above the Trigger
Level. For example, if Amount is set to 0.5 dB, 0.5 dB of attenuation is added when the ODEP level rises 1%
above the Trigger Level; 5 dB of attenuation is added when the ODEP level rises 10% above the Trigger Level;
etc. Attenuation levels of –0.25, –0.5, –1.0, –2.0, –3.0, –4.0 and –5.0 dB can be inserted.
Release Time: While ODEP Conservation responds almost instantly when ODEP levels rise above the
Trigger Level, response to falling levels is controlled by the Release Time control. Release Time sets the length
of time, in seconds, that ODEP Conservation delays before beginning to restore amplifier gain. Release Time can
be set to 0.2, 0.4, 0.6, 0.8, 1, 1.5, 2, 3, 4, 6, 8, 10, 12, 15, 20 or 30 seconds.

5.4.2 Smooth Output Limiter

The Smooth Output Limiter slowly reduces the gain of the amplifier to keep the average of the peak output level
below a predetermined output level.
Smooth Output Limiter: Turns on/off this feature.
Threshold: Sets the point at which the limiter begins to affect amplifier gain. The Threshold is the output level
(in dB) above which input attenuation is added to reduce gain. 0 dB equals the full rated output of the amplifier
when driving an 8 ohm load. For example, setting the Threshold to –7 dB results in gain reduction whenever the
output level rises above –7 dB. Threshold can be set from 0 dB to –50 dB in 1 dB steps.
Attack Time: Sets the rate at which limiter responds when the output level rises above the Threshold. Legacy
IQ P.I.P.s: The Attack Time range is 1 to 30 seconds. IQ2 P.I.P.s: The Attack Time range is 0.01 to 30 seconds.
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