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997 TT Alpine Installation with HUR: getting hum!

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YOUR RESEARCH997 TT Alpine Installation with HUR: getting hum!

Leading reported evidence

Replace stock audio system in my 997 tt

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Suggestion

I've decided to replace my stock audio system in my 997 TT with an Alpine INE-W925R.

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997 TT Alpine Installation with HUR: getting hum!
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Leading evidence: 'Replace stock audio system in my 997 tt' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Replace stock audio system in my 997 tt' (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.

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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.

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Suggestion

I can send the wiring schema I've used privately if that's useful (I can't simply put it online publicly as it contains one page from the euromotorspeed.com guide and this is probably copyrighted).

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997 TT Alpine Installation with HUR: getting hum!
Frequently discussed actions (2)

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Replace stock audio system in my 997 tt

No successful repair reported for this finding.

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Reported fixes
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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've decided to replace my stock audio system in my 997 TT with an Alpine INE-W925R.

Original post Read captured discussion
997 TT Alpine Installation with HUR: getting hum!

Use privately if

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 can send the wiring schema I've used privately if that's useful (I can't simply put it online publicly as it contains one page from the euromotorspeed.com guide and this is probably copyrighted).

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997 TT Alpine Installation with HUR: getting hum!
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3 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.

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POST 1Original post

Hello, I've decided to replace my stock audio system in my 997 TT with an Alpine INE-W925R. To do this, I bought the HUR package from Euromotorspeed.com. The installation went fine but now, I have a "hum" in the speaker when there is no or low sound being output from my Alpine. Essentially, any time I do something like low volume, mute, select an audio channel but don't play a song, etc. there is a hum on the speakers and this hum varies with the engine RPM, much like if something wasn't properly grounded. This makes me nuts... I can send the wiring schema I've used privately if that's useful (I can't simply put it online publicly as it contains one page from the euromotorspeed.com guide and this is probably copyrighted). What's odd to me is that the speakers should be hooked to the HUR by fibre, so there should be no ground issue, so where is the hum coming from and how to stop it?!? AFACIT, my HUR firmware is the last known one. Any help? Thanks!

POST 2Original post

Actually your speakers are not hooked up by fiber but by regular wire. And yes, you have a ground loop issue you will need to trace.

POST 3Original post

Hello amdeutsch, thanks for your reply. What I actually meant is that (at least based on my understanding), there is not a direct "wire" connection between the Alpine and the speakers i.e. there is a wire connection between the speakers and the Bose Amp and one between the Alpine and the HUR, but in-between, it gets "split" by a fiber connection, consequently the grounding issue must not directly be related to the Alpine, right? My assumptions were: - Either the Alpine indeed has a ground issue and is the one transmitting "hum" to the HUR, which translates that into signals on the fibre - Or the Alpine is fine and the HUR is the one with grounding issue and sending "hum" as it converts In any case, I am lost as to how I could trace back this grounding issue. Any advice on how to proceed? Any suggested reading? Thanks

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