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Help with Bose Subwoofer making a "bump" sound

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3 captured repliesPartial discussion capture · Source accounts, not a confirmed diagnosis

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YOUR RESEARCHHelp with Bose Subwoofer making a "bump" sound

Leading reported evidence

Replace cdr-24

Performed · outcome unconfirmed

No successful repair reported for this finding.

0
Reported fixes: 0
Unsuccessful attempts: 1
Discussions

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Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.

Discussions that performed work without a confirmed outcome: 1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Performed · outcome unconfirmed
A few years ago I replaced the CDR-24 with an AVIC-Z150 nav unit.
Original post Read captured discussion
Help with Bose Subwoofer making a "bump" sound

Frequently discussed work

Check / look

No successful repair reported for this finding.

0
Reported fixes: 0
Unsuccessful attempts: 1
Discussions

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Discussions that contain suggestions: 1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Suggestion
Other than being power on/off related, I'm not sure what to check / look for.
Original post Read captured discussion
Help with Bose Subwoofer making a "bump" sound

Read full discussion summary

Leading evidence: 'Replace cdr-24' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Check / look' (1 discussions). For that action, 0 discussions report a resolution and 0 report an unsuccessful attempt. No action has an explicit, attributable resolution report under the current rules. These are forum reports and suggestions, not a confirmed diagnosis.

Source reports, not a diagnosis or a success probability. Counts refer to discussions and can overlap.

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1 matching discussions · 3 captured posts examined · 1 partial discussions

Compare 4 other evidence results

Use euromotorsport kit

Performed · outcome unconfirmed

No successful repair reported for this finding.

0
Reported fixes: 0
Unsuccessful attempts: 1
Discussions

Read evidence and context

Discussions that performed work without a confirmed outcome: 1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Performed · outcome unconfirmed
I used the Euromotorsport kit.
Original post Read captured discussion
Help with Bose Subwoofer making a "bump" sound

Check / look

Suggestion or failed attempt

No successful repair reported for this finding.

0
Reported fixes: 0
Unsuccessful attempts: 1
Discussions

Read evidence and context

Discussions that contain suggestions: 1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Suggestion
Other than being power on/off related, I'm not sure what to check / look for.
Original post Read captured discussion
Help with Bose Subwoofer making a "bump" sound

Check grounds

Suggestion or failed attempt

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0
Reported fixes: 0
Unsuccessful attempts: 1
Discussions

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Discussions that contain suggestions: 1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Suggestion
If it didn't used to happen, and just started - check your grounds.
Original post Read captured discussion
Help with Bose Subwoofer making a "bump" sound

Use bose, or what is powering the sub

Suggestion or failed attempt

No successful repair reported for this finding.

0
Reported fixes: 0
Unsuccessful attempts: 1
Discussions

Read evidence and context

Discussions that contain suggestions: 1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Suggestion
Do you have a separate amp, using the BOSE, or what is powering the sub?
Original post Read captured discussion
Help with Bose Subwoofer making a "bump" sound

Frequently discussed actions (5)

These are separate views of the same evidence. Frequency alone does not establish a fix, and these counts must not be added together.

Check / look

No successful repair reported for this finding.

0
Reported fixes: 0
Unsuccessful attempts: 1
Discussions

Read evidence and context

Discussions that contain suggestions: 1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Suggestion
Other than being power on/off related, I'm not sure what to check / look for.
Original post Read captured discussion
Help with Bose Subwoofer making a "bump" sound

Check grounds

No successful repair reported for this finding.

0
Reported fixes: 0
Unsuccessful attempts: 1
Discussions

Read evidence and context

Discussions that contain suggestions: 1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Suggestion
If it didn't used to happen, and just started - check your grounds.
Original post Read captured discussion
Help with Bose Subwoofer making a "bump" sound

Replace cdr-24

No successful repair reported for this finding.

0
Reported fixes: 0
Unsuccessful attempts: 1
Discussions

Read evidence and context

Discussions that performed work without a confirmed outcome: 1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Performed · outcome unconfirmed
A few years ago I replaced the CDR-24 with an AVIC-Z150 nav unit.
Original post Read captured discussion
Help with Bose Subwoofer making a "bump" sound

Use bose, or what is powering the sub

No successful repair reported for this finding.

0
Reported fixes: 0
Unsuccessful attempts: 1
Discussions

Read evidence and context

Discussions that contain suggestions: 1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Suggestion
Do you have a separate amp, using the BOSE, or what is powering the sub?
Original post Read captured discussion
Help with Bose Subwoofer making a "bump" sound

Use euromotorsport kit

No successful repair reported for this finding.

0
Reported fixes: 0
Unsuccessful attempts: 1
Discussions

Read evidence and context

Discussions that performed work without a confirmed outcome: 1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Performed · outcome unconfirmed
I used the Euromotorsport kit.
Original post Read captured discussion
Help with Bose Subwoofer making a "bump" sound

Coverage and how to read this overview

Counts describe captured discussions, not unique people or a diagnosis. Author identities are not reliably stored. Exact duplicate evidence is counted once across matching discussions; one discussion counts at most once per action/state. Multiple repairs reported together remain a combination. Suggestions and failed attempts do not establish a fix. Matches cover whole discussions and can include related faults, model variants and incomplete threads.

3 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.

Planet-9: 1 discussions

0 evidence records excluded for query context · 0 excluded by outcome qualification · 0 adjusted by outcome qualification.

0 acknowledgements have no verified action link; they do not establish a repair result.

Generation: 20261027T000231Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1Original post

I have a 2006 Boxster S with the CDR-24 radio and bose sound system. A few years ago I replaced the CDR-24 with an AVIC-Z150 nav unit. I used the Euromotorsport kit. Everything has been working great. A couple days ago I noticed when I either start the car or just power it on, the subwoofer behind the seats make a single "bump" sound. It doesn't matter if the head unit is on or off. It also makes the bump sound when I turn it off. Other than being power on/off related, I'm not sure what to check / look for. Has anyone experienced this before, or have any thoughts on what I should look for first? thanks, John

POST 2Original post

If it didn't used to happen, and just started - check your grounds. If everything is good there - it *might* be a failure in the power supply of your amp. But this is one of those gremlin chasing adventures... Do you have a separate amp, using the BOSE, or what is powering the sub? Do you also get the thump if you turn off / on the head unit... or only with the ignition switch?

POST 3Original post

Houston987, Thanks for the thoughts and my apology for being so tardy in replying. I was traveling for work all last week. I have the stock Bose amp/speaker system. It's definitely ignition switch related. I hear the bump sound when I turn the ignition switch both off and on. Turning the head unit off/on doesn't make the sound. Yeah, I agree this is going to turn into one of those gremlin chasing adventures.... thanks for the help! JOHN

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