Bose Portable PA Knowledge

L1® Model II: Difference between revisions

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{{L1® Model II}}
{{L1® Model II}}


Introduced March 29, 2007.
Introduced March 29, 2007
 
Discontinued: Jan 2021


The {{Model II}} is [[RoHS]] compliant for release in Europe.  
The {{Model II}} is [[RoHS]] compliant for release in Europe.  
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For details about the cable see: [[T1_ToneMatch%C2%AE Audio Engine#Cables|T1® Cables]]
For details about the cable see: [[T1_ToneMatch%C2%AE Audio Engine#Cables|T1® Cables]]


 
<section begin=AnalogInput />
=== Analog Input  ===
=== Analog Input  ===
The Analog input is a ¼ inch balanced input jack.
The Analog input is a ¼ inch balanced input jack. Do not connect a stereo source to this input.


[[Image:Model 1S Analog Input Detail.png]]  
[[Image:Model 1S Analog Input Detail.png]]  
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==== Analog input trim (volume, or gain) control  ====
==== Analog input trim (volume, or gain) control  ====
There is a trim control for the analog input.
There is a trim control for the analog input. Turn this off (fully counter-clockwise) unless you have something connected to the Analog Input.


[[Image:Model II Analog Input Trim.png]]
[[Image:Model II Analog Input Trim.png]]


# Set the '''Trim''' control on the power stand to the 0 (zero) position.
{{Analog Input Trim}}
# Connect the audio source to the Analog Input
# Adjust the volume of the audio source to the maximum output without distortion.
# While playing the source, increase the '''Trim''' level so that the '''Signal/Clip''' indicator glows green or yellow.
# If the '''Signal/Clip''' indicator glows red, decrease the '''Trim''' level so that it glows only green or yellow.


[[Image:Model II Analog Input Level Green.png|Model 1S Analog Input]]  
[[Image:Model II Analog Input Level Green.png|Model 1S Analog Input]]  


<section end=AnalogInput />
==== Can a stereo signal be used with the analog input?  ====
==== Can a stereo signal be used with the analog input?  ====
<section begin="Stereo Source to Power Stand Analog Input" />  
<section begin="Stereo Source to Power Stand Analog Input" />  
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A:  
A:  
:Over a year ago we implemented an improvement which allowed the system to better withstand extreme low voltage conditions caused by brown outs etc. Units produced prior to this change were quiter during the power down sequence.  
:Over a year ago we implemented an improvement which allowed the system to better withstand extreme low voltage conditions caused by brown outs etc. Units produced prior to this change were quieter during the power down sequence.  


:Note: This noise is only present when the system is being turned off following use. For instances where this subtle noise is objectionable you may remove the Cylindrical Radiator loudspeaker and disconnect the Speakon cable of the B1 before powering down the system.
:Note: This noise is only present when the system is being turned off following use. For instances where this subtle noise is objectionable you may remove the Cylindrical Radiator loudspeaker and disconnect the Speakon cable of the B1 before powering down the system.
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