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Sound is not heard from all speakers | Acoustimass® 16 Series II home entertainment speaker system
Be sure the proper speakers are selected.
Many receivers have outputs for "A Speakers" and "B Speakers." If the Bose speakers are connected to a set of outputs that are not selected, they will not play
Try a different audio device.
Connect and play another audio device through your product. This can help determine if the issue is isolated to the first device.
Reset your Acoustimass module.
Much like rebooting a smartphone, your product might need to be reset on occasion to correct minor issues. For more info, see Resetting your product.
Check the balance level on your receiver.
The receiver balance level may be adjusted incorrectly. Be sure it is set to a middle level.
In the receiver menu, check for individual speaker volume adjustments.
Many receivers let you individually adjust the volume heard from each speaker. In the receiver menu, look for and adjust applicable audio settings as needed. See the receiver's owners guide for more information.
Use the speaker test tone feature on the receiver.
Many home theater receivers have feature, often called "Test Tone," that plays sound through one speaker at a time. Check for this feature (or one with a similar name) in the receiver menu and, if available, select it. During the test, if one or more speakers are not heard, check the connections to the speakers. If all the speakers are heard as expected during the test, the issue is not with the speakers, speaker wiring or speaker connections on the receiver.
Check the condition of the speaker wires and be sure they are secure at both ends.
Check the speaker wires for any kinks, scratches, cuts or damage. Replace any damaged wires and check that they are securely connected at both ends.
Check the condition of the input cable and the connector going into the Acoustimass module cable.
Disconnect the connector that plugs into the Acoustimass module and check to see if there are any bent or missing pins. Check for any kinks or cuts in the wires. If the cable or connectors are broken in any way, replace the cable
Switch the speaker wires on the output of the receiver.
At the back of the receiver, switch the connection of the speaker wire that may not be working properly with one that is working properly. If the problem does not stay with the same speaker, contact the manufacturer of the receiver for assistance
Try switching the speaker:
Swap the speaker that isn’t working with one that is. If the issue follows the same speaker, it may need service. Scroll down and click "Start a repair or replacement" to explore your options.
Switch the speaker wires on the output of the Acoustimass module.
At the Acoustimass module connection panel, switch the connector of the speaker that may not be working properly with the one that is working properly. If the problem stays with the same speaker, the speaker wire is defective. Replace the speaker wire. Be sure the connectors are returned to their original jacks
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