Bose FREESPACE 4400 User Manual

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When you receive the communications port error dialog, the 
FreeSpace

®

 4400 Installer™ software was not able to locate a 

FreeSpace 4400 system on the COM 1 port.

This normally occurs due to one of three reasons:

• The PC and FreeSpace 4400 are not connected via a “straight-

wired” serial cable.

• Another software application has control of the serial port. 

Applications such as the Palm OS, or other audio applications 
control the serial port while they are open. Close these applica-
tions and click the Try Again button.

• The FreeSpace 4400 is connected to another communications 

port. If this is the case you should select the appropriate COM 
port and click the Try Again button.

If the system is powered on and operational, but there is no 
sound, check the following:

• Do the front panel LEDs indicate normal operation?

• Is the source operating?

• Is routing correct?

• Is output gain correct?

• Is the output gain muted?

• Is cabling correct?

No audio in zone.

Are the AUDIO 

SOURCES indicators 

green?

• Make sure that the audio sources 

are connected to the FreeSpace 
4400 LINE inputs and that there is 
an input signal from the source.

• Using the FreeSpace 4400 

 

Installer™ software, check that 
the input gain is raised.

• Make sure the source is on.

No

Yes

The amplifier is in “protect” mode. 
Disconnect the load and see if the 
output indicator changes to green. 
If so:

• Check for a short in the output 

line,

• Make sure no small strands of 

wire are touching other wires,

• Make sure loudspeakers are func-

tioning correctly, or

• Using a voltmeter, check for a 

voltage drop in the power line 
when amplifier is being driven ex-
cessively hard.

See amplifier fault troubleshooting 
section for course of action.

Is AMP OUTPUT 

indicator red?

Are the

AMP OUTPUTS

indicators green?

Contact your local 

Bose representative or 

visit pro.Bose.com

Yes

No

No

Yes