English Installation and Operation Page 27
pro.Bose.com Setup and Operation
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.
3 POWER indicator
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.
1 INPUT A/B selector switch
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 Volume Control with A/B Select
User Interface accessory.
Note: When the Bose Volume Control with A/B Select User Interface is connected, the source select and the MASTER
LEVEL control will be overriden by the controls on the remote user interface.
4 TREBLEØBNMSQNK
Allows adjustment of the output tone. Provides +/-6 dB of adjustment at 7 kHz.
2 BASS control
Allows adjustment of the output tone. Provides +/-6 dB of adjustment at 100 Hz.
( MASTER LEVELØBNMSQNKØ
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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