Check out post 121 on this thread, it has a wiring diagram for the speakers and engine sound generator control unit:

https://rennlist.com/forums/992/1351...e-topic-9.html

 

According to the wiring diagram looks like there is no additional lead from the speaker other than + and - terminal. There must be a control module that feed the "fake engine" audio signal to the main amp. So I am not sure if the "engine sound" can be disconnected on the speaker side. (but I could be wrong, as I have not taking apart the speaker on my 992 yet)

 

Hold on guys…

@J Irwan in Post #124 on that same thread refuted this claim and attached actual wiring diagrams for the 992 that do not show sound symposer speaker wiring.

https://rennlist.com/forums/992/1351...l#post19951866

EDIT: Corrected link above to point to post #124

 

Unless I am reading that thread wrong, one set of diagrams was for a 2020 C4 and the other diagram was for a 2024 C2T. It would not surprise me if some 992 models have the electronic noise and others do not.

 

See post #100. 2022 992S with sport design rear bumper does NOT have sound symposer.

 

I forgot someone post this, @Mike818 does your has Factory equipped SD kit ?

Mine has SD kit, but I remember one of the 992 that I test drove (before I got mine) was a Carrare base with PDK with standard bumpers and engine sounds is very similar to my '24 T, which is no surprise as they both have the same engine.

 

No I don't have the sport design option on my T.

 

I just posted the "Actual" wiring diagram with the fake noise generator. Hopefully that will remove doubts

 

I think it boils down to your style of rear bumper. The Sport Design (SD) rear bumper is actually the standard rear bumper for the Turbo and GTS that is/was also sold as an option on the S and T. The SD bumper is more than just aesthetic. It has enhanced air flow through the intercoolers by design and is different from the base rear bumper. So, I think any 911 with the SD rear bumper (Turbo, GTS, S or T with rear SD bumper option) does NOT have the sound symposer.

 

I have a 2024 C2S w/ standard bumper completed in Feb 24 and there is no sound symposer hardware.

 

Does that mean that sound is not piped into your cabin or does it come in by some other method?

 

It means that the Helmholz resonator boxes and associated tubes from the intake manifold and to the firewall are not present.

 

well,…. There goes the SD bumper theory. Ha ha. Thanks for responding, Noodler.

 

Logically, Porsche would not make the style of the plastic bumper the determining factor on how the car should sound.

Instead, the requirement to augment the engine’s sound would be based on the 911 variant (base, T, S, GTS, Turbo, etc.)…

Here are some practical considerations Porsche may have used:

1. Do the characteristics of the engine in the specific 911 variant warrant help from an electronic or physical symposer?

2. Does the placement of the specific 911 variant within the 911 range need to sound a specific way for marketing reasons? (For example, you would expect a GTS or Turbo to sound better/different than other models).

3. Does the amount of insulation or sound deadening in the specific 911 variant affect the perceived sound of the vehicle, and does this need to be compensated for?

Porsche has been insisting that there is NO electronic engine sound played by speakers in the interior of the car, according to the numerous 992 reviews I’ve read and watched. We were told that the only sound was natural engine sounds piped into the cabin through the physical symposer (in order to compensate for the additional sound deadening in the 992).

Based on the wiring diagrams shared above, I feel slighted. Do you feel slighted?

I am sure all of us would have bought the car regardless, but they should simply be more forthcoming about this, because it matters to their customers base.

 

all logical and make sense however Mike818 found wiring diagram for engine sound generator in a “T”of all trim, the one that comes with least sound insulation. Which is confusing 😊