BMW E46 convertible/coupe: Speaker mount (165 mm Medium speaker + 44 mm Twitter)

These speaker adapters were designed during my E46 convertible sound upgrade.

My E46 is a Euro spec convertible without Hi-Fi nor HK options. This means:

• Sound amplification is done directly by the build-in radio (CD53 manufactured by Alpine), with NO extra amplifier on the back
• Sound was really bad given BMW did not include a cross-over between twitter and medium

My speaker choice fell on RockFord Fosgate Punch Series P165-SI (after listening to several models in crutchfield.com). The P165-SI bundle includes a 165mm (6.5") medium and 44mm twitter, without modifying anything in the car (so I can revert to original set-up when selling the car),

I decided to create a custom bracket because:

• Medium is quite chunky, with a mounting depth of 57mm (2.24"), requiring to customize the mount for the speaker to properly fit without modifying anything in the car
• Twitter sound is directional and most of the adapters I found online are flush to the door (not directed to driver and passenger head), so I create a mount with a 10º angle upward and 25º angle inward (angles were eyeballed)

After printing them, I sanded the medium mounts (where I used printing support), put insulating foam on the mounts, installed sound dampening on the doors and installed the new speakers in the car with connectors I found on Amazon (which I had to modify from the speaker side as RockFord Fosgate connectors are 1 size wider).

Please see the photos for the exact install.

Material I bought for the conversion (on top of the attached 3d models):

• 12 M3 nuts
• 12 M3 screws (25mm)
• 8 x Grey Clips (51418224781):
  https://www.hubauer-shop.de/en/clip-with-sealing-ring-51418224781.html
• 14 x White Clips (51418224768):
  https://www.hubauer-shop.de/en/clip-with-washer-natur-51418224768.html
• Speakers:
  https://www.lakro.nl/p165-si-euro-fit-165-cm-65-component-system-rockfo.html
• Foam:
  https://www.amazon.com.be/dp/B077L5W5D7?ref=ppx_yo2ov_dt_b_product_details&th=1
• Cable to connect to car:
  https://www.amazon.fr/dp/B00PWMQG40?psc=1&ref=ppx_yo2ov_dt_b_product_details
• Connectors:
  https://www.amazon.com.be/dp/B09YM4PJVL?psc=1&ref=ppx_yo2ov_dt_b_product_details
• Sound deadening:
  https://www.amazon.com.be/dp/B082Q2J2T4?psc=1&ref=ppx_yo2ov_dt_b_product_details

Videos you can use for instructions:

• Taking apart door:
  • https://www.youtube.com/watch?v=WTi5jVyPJUo&t=366s
  • https://www.youtube.com/watch?v=cK39XPPajb8
• Installing sound dampening:
  https://www.youtube.com/watch?v=tk-BmZWX1ko&t=1497s

P.S.: the "Top" ring is not mandatory. You could use washers against the speaker to screw the speaker to the support, but I wanted to make use of the foam set on the back side of the speaker ring

P.S.2: This is part of a longer effort to upgrade and restaure this E46 which I recently bought 3rd hand. Feel free to contact me if you are curious about broader details of the project and other modifications :)