Bose FreeSpace ZA 250-LZ Manuel d'installation et d'utilisation - Page 12
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Setup and Operation
2.9 Operation – Front-panel controls and indicators
q
w
Note: Front-panel controls and indicators are identical on the FreeSpace
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 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 on the front panel
of the amplifier will not function. The position of the A/B switch on the user interface will determine what source is
selected.
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 optional Bose Volume Control User Interface or
Volume Control with A/B Select User Interface accessories.
Note: When the Volume Control User Interface is connected, the front-panel MASTER LEVEL control will not function.
The position of the volume control on the User Interface determines overall system volume.
Page 26
Installation and Operating Guide
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IZA 190-HZ amplifier.
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