Bose FREESPACE 4400 User Manual

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The AMP OUTPUT LEDs work in pairs (1 and 2, 3 and 4) and indi-
cate the operating status of the four amplifier output channels.

When an amplifier fault occurs, the amplifier mutes its outputs 
and indicates an error. After a short period of time the amplifier 
will try to operate again. If the fault condition persists, the ampli-
fier will attempt to restart six times, after which it will remain 
muted.

Amplifier faults are typically caused by a shorted loudspeaker 
line, an overdriven amplifier, or a saturated output transformer.

• To check for a shorted loudspeaker line, remove the loud-

speaker connection from the amplifier channel. If this resolves 
the problem, locate and correct the shorted loudspeaker line.

• To make sure that you are not overdriving the FreeSpace 4400 

output, change to a different source. If the problem no longer 
exists, use the FreeSpace 4400 Installer™ software to reduce 
the input level of the original source that was overdriving the 
output.

• To make sure an output transformer is not being saturated, 

check to see if the correct loudspeaker EQ setting is selected.

If none of these actions solve the problem, read the instructions 
in the following flow chart or check the error log using the 
FreeSpace 4400 Installer™ software.

Check for

• Shorted wiring

• Overdriven amplifier 

(reduce output gain)

• Transformer saturation

• Entry in FreeSpace 

4400 Installer™ soft-
ware error log

AMP OUTPUT

indicators are red

Has the FreeSpace 

4400 system shut 

down during

operation?

• Check the number of loudspeak-

ers connected to the FreeSpace 
4400 system. Verify that the total 
sum of loudspeaker taps con-
nected to the FreeSpace 4400 
system does not exceed 400W.

• Verify that there are no shorts on 

the loudspeaker output lines.

No

Yes

• Switch POWER to OFF.

• Disconnect the load and switch 

   POWER to ON.

• Verify that there are no shorts on 

the loudspeaker output lines.

See amplifier fault troubleshooting 
section for course of action.

Is SYSTEM

STATUS indicator

green?

Does the 

FreeSpace 4400 

Installer™ software 

Error Log list
any amplifier

faults?

Yes

No

No

Yes

Contact your local 

Bose representative or 

visit pro.Bose.com