Planet-9

2007 987 - Garbled Sound

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Original source

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

THIS DISCUSSION / SOURCE-DERIVED OVERVIEW

Discussion summary

YOUR RESEARCH2007 987 - Garbled Sound

Leading reported evidence

Replace factory head unit

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
I replaced my factory head unit with a Pioneer AVIC-Z120BT back in 2011.
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2007 987 - Garbled Sound

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Leading evidence: 'Replace factory head unit' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Replace factory head unit' (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 · 6 captured posts examined · 1 partial discussions

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Replace inferior parts

Suggestion or failed attempt

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
I'm just enough of a heretic to not care about replacing inferior parts when it benefits me.
Original post Read captured discussion
2007 987 - Garbled Sound

Frequently discussed actions (2)

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

Replace factory head unit

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 replaced my factory head unit with a Pioneer AVIC-Z120BT back in 2011.
Original post Read captured discussion
2007 987 - Garbled Sound

Replace inferior parts

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
I'm just enough of a heretic to not care about replacing inferior parts when it benefits me.
Original post Read captured discussion
2007 987 - Garbled 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.

6 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: 20261027T124345Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1Original post

I replaced my factory head unit with a Pioneer AVIC-Z120BT back in 2011. Honestly, I was satisfied with the sound. Of course, the OEM unit had really lowered the bar on that. But it started distorting badly, mainly bass sounds are coming from it and if you give it any volume at all it sounds like the speakers are about to self destruct. I just removed the Pioneer and plugged the OEM unit back in. Same thing. WTF? I'm searching for clues but if anyone could jump start the process by pointing me in the right direction I would appreciated it. Is there an amplifier AFTER the head unit that is maybe screwing up? My goal is just to get back to where I was before it started malfunctioning, unless that means giving Porsche two grand for some part.

POST 2Original post

Found it. I should have looked harder before posting. I'm still open to any advice on a replacement or repair.

POST 3Original post

It almost sounds like the cones have started to separate from the speaker frames. I'd pop the door cards off and take a look at them...

POST 4Original post

Wilco. That's easy enough to check. But I think it's the amp, just because I'm seeing so many people have them fail. I pulled the amp and now the garbled sound is gone (still could be the speakers). I'm willing to go off the reservation here and buy a non OEM amp if that's the smart play. I'm reading that the amp drives three channels but all I'm seeing is that the 2 larger speakers in the door are dead without it. This is not a Bose system. Is there another speaker in back somewhere that I'm just being too dense to see? I will keep the OEM amp so the next guy can put it back in if he wants to. I'm just enough of a heretic to not care about replacing inferior parts when it benefits me. I even still have the OEM radio, just in case.

POST 5Original post

It's easy enough to track down the mating connector to allow an amp bypass (probably the same one as the Bose system, just a few open pins). This thread describes the speakers and where they get their power from in the non-bose system... http://www.planet-9.com/987-cayman-and-boxster-electronics/12118-speaker-size-non-bose.html There's also a pair of crossovers somewhere (probably buried in the dash) to split the signal for the front mids and tweeters...

POST 6Original post

Its sounds like a speaker is blown. you can check this visually. Also, if you press the speaker cone in it should move easily and smoothly, if there are problems you'll feel them when pushing in the speaker cone.

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