Operation - Front-Panel Controls And Indicators - Bose Professional FreeSpace IZA 190-HZ Installation And Operating Manual

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Operation – Front-panel controls and indicators
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Note: Front-panel controls and indicators are identical on the FreeSpace IZA 190-HZ amplifier�
OFF/ON switch
.
Turns amplifier on or off�
POWER indicator
3
Illuminates blue when amplifier is on�
INPUT CLIP indicator
$
Illuminates red whenever input source approaches the threshold value of -3dBFS� If the indicator illuminates
frequently, reduce input signal level�
MIC/LINE INPUT GAIN control
/
Allows for fine-tuning of the MIC/LINE input level� If the INPUT CLIP indicator is red, reduce the input gain�
The adjustment range is 0 dB to +50 dB�
INPUT A/B selector switch
1
Allows you to choose between rear line inputs A and B from the front panel of the amplifier�
Rear line inputs A and B can also be selected remotely with the use of optional Bose Professional Volume
Control with A/B Select User Interface accessory�
Note: When the Bose Professional Volume Control with A/B Select User Interface is connected, the source
select and the MASTER LEVEL control will be overridden by the controls on the remote user interface�
TREBLE control
4
Allows adjustment of the output tone� Provides +/-6 dB of adjustment at 7 kHz�
BASS control
2
Allows adjustment of the output tone� Provides +/-6 dB of adjustment at 100 Hz�
MASTER LEVEL control
(
Controls the overall system volume for both the loudspeakers and the variable AUX OUT�
The Master Level can also be controlled remotely with the use of the optional Volume Control with A/B Select
User Interface accessory�
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Setup and Operation
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Installation and Operation 27