Bass Module 700 sound quality problems such as boominess, thin bass or audio artifacts are handled on the host soundbar: Bose's module pages for tone controls, audio artifacts and low audio all send you to the host product's help. Check the module's rear LED is solid white, set the soundbar's tone controls in the Bose app, set the TV's sound output format to PCM, and place the module away from walls and glass, where low bass can boom.
Differential
Likely causes of “Bose Bass Module 700 sounds distorted, muffled or unbalanced”, and how to tell them apart
- 1
Module placement
What separates it Bass is boomy in one corner and thin in another
How to confirm Move the module away from the wall and test in two positions
- 2
Tone settings too high
What separates it Bass is loud enough that it drowns out dialogue and speech in movies
How to confirm Reset the soundbar's bass control to neutral in the Bose app
- 3
A source format issue
What separates it Only some programs or sources produce crackle and other audio artifacts
How to confirm Set the TV's sound output format to PCM
- 4
A module link fault
What separates it Bass comes and goes at random while the rest of the soundbar plays steadily
How to confirm Check the LED stays solid white and power-cycle the module
Before you touch a setting
Record this first — changing settings destroys the evidence
- Where the module sits in the room
- The soundbar's bass and treble settings
- Which sources and programs have the artifacts
Try in this order
0 of 5 completedConfirm the link
ReversibleRead the module's rear LED. Solid white means it is connected; dim amber means bass will vanish or stutter.
Set tone controls
ReversibleOpen the soundbar's Audio settings in the Bose app and return bass and treble to neutral before adjusting.
Test placement
ReversibleMove the module to a different spot away from walls and hard corners and compare the sound.
Check the source
ReversibleSet the TV's sound output format to PCM and play the same content from another input to see whether the artifacts follow the source.
Reset
ReversibleUnplug the module's power cord for 30 seconds, reconnect it, wait 15 seconds for it to relink, and then listen to the same track again.
Stop boundary
When this stops being a self-service repair
- !If artifacts persist on every source after a reset of both devices, request service
- !If the module buzzes or rattles at low volume, unplug it and contact Bose
Evidence ledger
Sources behind this answer
The rear LED states from off to white blinking.
Outlet, cord and LED checks.
Unplug 30 seconds and wait 15 seconds to reconnect.
The label on the bottom of the module.
The module works only with a host soundbar or console.
Refers to the host product's troubleshooting.
Refers to the host product's troubleshooting.
Refers to the host product's troubleshooting.
Tone is set on the host product.
The Connect step for an accessory bass module.
Disconnect the bass module and surround receivers during a reset.
The same accessory disconnect step for the Ultra.
Lists the Acoustimass 300 and Bass Module 700 LED states.
Exact questions
Common questions
Where do I set bass level?+
On the host soundbar, not the module.
Can the module cause artifacts?+
A poor wireless link between module and soundbar can cause artifacts.
What about low audio?+
Bose sends you to the soundbar's help.
Is placement important?+
Yes, low bass depends on position.
What output format helps?+
PCM, set in the TV's sound output menu, removes format problems.
Does the module have tone controls?+
No, bass and tone are adjusted on the host soundbar, not the module.
What if it rattles?+
Unplug it and contact Bose, because a rattle can mean damage.
What does the LED show?+
The LED shows the module's power and connection state to the soundbar.