Pelican Parts

M490 to M680 upgrade. Worth it?

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1 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis

THIS DISCUSSION / SOURCE-DERIVED OVERVIEW

Discussion summary

YOUR RESEARCHM490 to M680 upgrade. Worth it?

Leading reported evidence

Install bazooka unit behind the rear seats

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 · Original poster
The previous owner had upgraded these speakers and also fitted a bazooka unit behind the rear seats.
Original post Read captured discussion
M490 to M680 upgrade. Worth it?

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Leading evidence: 'Install bazooka unit behind the rear seats' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Install bazooka unit behind the rear seats' (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 · 1 captured posts examined · 0 partial discussions

Compare 1 other evidence results

Set on ebay and put them in

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 · Original poster
There were no door speakers but the wires were there so I picked up a set on eBay and put them in.
Original post Read captured discussion
M490 to M680 upgrade. Worth it?

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.

Install bazooka unit behind the rear seats

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 · Original poster
The previous owner had upgraded these speakers and also fitted a bazooka unit behind the rear seats.
Original post Read captured discussion
M490 to M680 upgrade. Worth it?

Set on ebay and put them in

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 · Original poster
There were no door speakers but the wires were there so I picked up a set on eBay and put them in.
Original post Read captured discussion
M490 to M680 upgrade. Worth it?

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.

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

Pelican Parts: 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: 20261026T172408Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

Just bought a '99 996. It appears to have the stock M490 audio setup with a 6x40W amp, CR-210 head unit and a pair of dash and rear speakers. The previous owner had upgraded these speakers and also fitted a bazooka unit behind the rear seats. There were no door speakers but the wires were there so I picked up a set on eBay and put them in. The guy I bought them from had an M680 amp + DSP control unit that he threw in for $25. Is there any benefit at all to swapping out the m490 amp for the m680 one? Also I've read that the M680 unit will not work unless the dsp controller is connected so will the wiring harness for the M490 setup include the connector for the dsp controller?

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