Hello. Could you share more details on the speaker pod modification? What did it take to do it? If you have any more work-in-progress photos, that would be great. I’m facing the same problem on a Peugeot 408
The wiring harnesses and their layout may differ between the DS4 and the P408. It’s best not to rely on these and instead explore the 408. You should locate the front speaker cables under the dashboard. In the DS4, they’re all together located near the steering wheel. An acoustic crossover can be installed there to separate the front tweeters from the front woofers.
For the rear, I looked in the B-pillars and split the speaker signal there.
No, I meant how did you modify the speaker stand to actually fit it? Did you install a custom ring
Regarding the front door speaker mounting, I mentioned earlier that I did a custom DIY but they are ready and I provided the OE numbers. I don’t know if they also fit the P408, but in my opinion they should.