Special Features - Master audio JOKER Serie Manual Usuario

Master Audio
The factory default for a Joker system is the following:
Audio Settings
• Preset: FLAT
• Gain: 0.0dB
• Delay: 0m
• Mute: Off
• Polarity: Positive (Pol+) (only in subwoofers)
User settings:
• Front LED: Off when Limiting
• Backlight: Off after 30 seconds of no activity
• ECO Mode: Off
• Keypad Lock: 30s MENU+SELECT
• Language: English

4.6 Special Features

Automatic Temperature Limiter
Under normal operation, Joker amplifiers are able to perform during many hours at
full power. However, should the temperature in the amplifier rise abnormally, the
system will automatically adjust the limiter threshold to try to compensate for the
temperature raise. The system will progressively lower the output gain.
When the temperature lowers again, the system will recover its normal operation.
Should the temperature continue rising and reach 90ºC at the amplifier's heatsink, the
system will shut down in Protection mode.
Input Overload Protection
Joker systems are equipped with a high range input (+20dBu – 8V), but still there are
sound sources and mixers capable of delivering a higher output voltage.
It must be notice that driving a system continuously over its nominal input level
may drastically decrease the sound quality, normally because of the lack of
headroom (dynamic response). In the long term, it might also produce unnecessary
aging of the transducers.
Also the maximum power of the system is obtained at its nominal input level,
and working above it does not translate into better results.
Joker Systems are equipped with an input monitoring system that will prevent the
cabinet from being continuously operated at excessive input signal levels. After a long
period of exposure to high input levels, the cabinet will enter in Input Overload
Protection mode, meaning that:
- 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
+8dBu (2V), which is the nominal and recommended value.
Joker Series (Active). Version 1.4 Jan14
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