Amate Audio Joker Active Systems Manual De Usuario página 36

Joker Active systems
aging of the transducers and reduce their reliability. The maximum power of the
system is obtained at its nominal input level. Under this condition, the limiter Leds
may blink occasionally. Working continuously above this level is never translated into
better results.
To avoid loudspeaker damage because of input overload issues, Joker systems
build in an input monitoring system that prevents the cabinet from being
continuously operated at excessive input signal levels. After a long period of
exposure to high input levels (more than 5 minutes over +15dBu / 4.5V), the cabinet
will enter in Input Overload Protection mode, meaning that:
- The output signal will be reduced by
20dB
- All limiter LEDs will be lit
- The front power led will blink
- A message will be shown in the LCD
(Input Overload)
To get back to the normal operation mode, the input level should be reduced to
+5dBu (1.4V). After the level reduction, the system needs around 10 seconds to
recover the normal operation mode.
d) Adaptive Loudness
(ALC).
ALC is a DSP algorithm developed by the
Research and Development team at Amate
Audio to improve the listening experience
when the cabinet is being used at low
reproduction levels.
Under this listening condition, the behaviour of human ear is to naturally enhance the
level of middle frequencies. The lower the level, the higher is the middle frequency
enhancement. To compensate for that effect, ALC applies a correction to the
frequency response of the system.
In order to do that, ALC automatically senses the average signal level at the input:
when this level is low, the DSP will apply loudness compensation curves (based on
Fletcher-Munson's equal loudness contours), that will dynamically adapt the
frequency response of the cabinet to the listening conditions.
This feature will only influence the frequency
response when the input signal average is
below 6dB of the nominal input, that is, when
the cabinet is performing at levels below half of
its rated program power. In the range between
-6dB and 0dB in respect to the nominal input,
the ALC will not modify the response.
36
ALC (Loudness)
Compensation
Disabled
Auto
Back
FLAT
Oct 2015
.
0.0dB
30
ALC
Lock
Amate Audio