Special Features - Master audio KEY12A Manual Usuario

Master Audio
System Settings
Model: KEY12A
Version: 1.0
Firmware: 3.0
Press MENU to Restore
Factory Settings
In the last screen (Settings), it is also possible to reset the system to the factory
values. To do this, press MENU and then highlight the option Restore with MENU.
Press SELECT to confirm
The factory default for a KEY 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

4.5 Special Features

Automatic Temperature Limiter
Under normal operation, KEY 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
KEY 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.
KEY Series (Active). Version 1.0
.
Factory Settings
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Restore .
Feb14 19