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PWS speaker details

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To my surprise my Model 3 doesn't have the PWS speaker enabled, I thought it was mandatory now but I understand that it's the case. Anyway it seems a shame to let that speaker go to waste. I assume the speaker is in there anyway, I haven't checked but that shouldn't get in the way of a fact finding mission.

Has anyone handled one of these speakers and determined the details about it and how it performs? Wattage, impedance, frequency response, etc. I know it just has a two wire connector that can be easily sourced, just looking for info as I quite like the idea of using it to play appropriate audio at appropriate times on private land. I already have a few devices in mind to link together to make a dynamic soundboard device powered by USB and I'm surprised that nobody seems to have done this already.

Regarding wiring, is there an easy way to run a thin two-core cable from the centre console to the speaker via the frunk without removing or affecting any trim? I'm essentially looking for a grommet I can just tease the cable through and I don't want to go cutting or drilling my new M3. Alternatively is there a 12V source in there that I can easily piggyback from to power a small amp secured inside the bumper? RHD car by the way, may affect it.

Edit: Should say that I don't want to play engine noises, that's silly. Nor do I want to play police sirens, as funny as that would be. I'm not trying to do anything illegal here, I'm thinking more along the lines of an exterior fart machine...
 
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Hi, I am making my own PWS sound generator, as my 2020 (Italian) M3 does not have any speaker installed....does somebody have a drawing (or, better a 3D model) of the original speaker enclosure ? I guess there is some kind of weather protection and so forth.... I'd like to build one by myself, adding place for my electronics. Thank you in advance...