PistonHeads

poor DAB - Page 1 - Boxster/Cayman - PistonHeads UK

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Original source

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

THIS DISCUSSION / SOURCE-DERIVED OVERVIEW

Discussion summary

YOUR RESEARCHpoor DAB - Page 1 - Boxster/Cayman - PistonHeads UK

Reported or suspected cause

antenna position

Suggestion or failed attempt

No successful repair reported for this finding.

0
Identified cause: 1
Suspected cause: 0
Reported fixes

Read evidence and context

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 suspect a cause: 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.

Suspected cause
It is more likely the antenna position which on lots of modern cars is far from ideal, some use bumpers, glass etc.
Original post Read captured discussion
poor DAB - Page 1 - Boxster/Cayman - PistonHeads UK

Frequently discussed work

Use bumpers, glass etc

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
It is more likely the antenna position which on lots of modern cars is far from ideal, some use bumpers, glass etc.
Original post Read captured discussion
poor DAB - Page 1 - Boxster/Cayman - PistonHeads UK

Read full discussion summary

Leading evidence: 'antenna position' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, the most frequently mentioned possible cause is 'antenna position' (1 discussions; 0 report identifying it and 1 suggest it). The most frequently discussed action is 'Use bumpers, glass etc' (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.

Read captured replies

1 matching discussions · 8 captured posts examined · 1 partial discussions

Compare 1 other evidence results

Use bumpers, glass etc

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
It is more likely the antenna position which on lots of modern cars is far from ideal, some use bumpers, glass etc.
Original post Read captured discussion
poor DAB - Page 1 - Boxster/Cayman - PistonHeads UK

Frequently discussed actions (1)

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

Use bumpers, glass etc

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
It is more likely the antenna position which on lots of modern cars is far from ideal, some use bumpers, glass etc.
Original post Read captured discussion
poor DAB - Page 1 - Boxster/Cayman - PistonHeads UK

Reported and suspected causes (1)

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

antenna position

No successful repair reported for this finding.

0
Identified cause: 1
Suspected cause: 0
Reported fixes

Read evidence and context

Discussions that suspect a cause: 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.

Suspected cause
It is more likely the antenna position which on lots of modern cars is far from ideal, some use bumpers, glass etc.
Original post Read captured discussion
poor DAB - Page 1 - Boxster/Cayman - PistonHeads UK

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.

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

PistonHeads: 1 discussions

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

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

Outcome without a verified action link
A preamp may help a little but often just amplifies 'noise' hence no improvement.
Original post Read captured discussion
No unique explicit quoted action; no causal link assigned

Generation: 20261026T191851Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

718 with PCM4 head unit ...think it's a Harman MIB2 DAB has been really poor from new. No adapters etc plugged in causing noise, it's just rubbish. Has anyone tried adding a pre amp ?

POST 2Original post

A preamp may help a little but often just amplifies 'noise' hence no improvement. It is more likely the antenna position which on lots of modern cars is far from ideal, some use bumpers, glass etc. A decent car audio installer should be able to help you find the antenna and cable and fit something better.

POST 3 / ORIGINAL POSTEROriginal post

thanks yeah, I guess if the signal from the window antenna is already poor, then a pre-amp can't magically conjour up some miracle

POST 4Original post

In theory noise can be filtered out ... at least there would be a signal for the digital receiver to de-code. Signal strength can also be lost in poor connections and cabling ... poor shielding etc.

POST 5Original post

Isn’t the aerial in the screen? Has a new one been fitted in the lifetime of the car? If I remember correctly it’s a blue connector somewhere in the bowels of the dash.

POST 6 / ORIGINAL POSTEROriginal post

No changes have been made and yes I think its a windscreen integrated one. Guess its a single coax down to the head unit? But the MIB seems to have separate DAB and FM connectors (Fakra and SMB ?)

POST 7Original post

I know you said you've nothing added but do you have a dash cam fitted? I found that the wire for the dash cam interferred with the DAB signal but by adding a couple of ferrite cores to the dash cam wire solved the problem. Also try rebooting the PCM by pushing and holding down the volume button for 20 seconds.

POST 8 / ORIGINAL POSTEROriginal post

Good tips I *do* have a dash cam, but I disconnected it all to see if it made a difference. The answer was yes, some. But its pretty poor even with that disconnected. I will try adding a clip on ferrite though...cheers

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