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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Technical Forums > AUDIO/VIDEO + BLUETOOTH + Electronics/Alarm/Software > Fitting Focal ES100K speakers in E92 doors

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      01-24-2017, 12:44 PM   #1

Drives: E92 M3 Coupe
Join Date: Oct 2016
Location: UK

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Fitting Focal ES100K speakers in E92 doors

I've been having some fun and games with this the last few days. My speakers were supplied with CT25BM08 adaptor rings. For the life of me I couldn't see how you're meant to get these to sit flat as there's nothing to accommodate the heads of the three bolts needed to secure the speaker to the adaptor.

I figured I could do better with my 3D printer... the first attempt looked good, but unfortunately the end result sat the speaker a bit too deep in the door causing a slight squeak when winding the window up and down.

So, a redesign was needed to mount the speaker on the other side of the ring. The result accommodated the gasket supplied with the Focal grills nicely.

And the speaker then sat in this, secured by four button head M4 x 16mm stainless bolts.

The nyloc nuts were held captive in the ring.

Some 10mm wide, 3mm thick neoprene draught excluder then provided a seal to the door.

The new design sits the speakers 4.4 mm closer to the door. No more interference with the window!

I made a mirror image ring for the other door.

And the tweeter adaptor rings described HERE completed the effort.

So, I'm wondering if anybody else is interested in benefitting from my efforts? The mid rings take about 7 hours each to print as they're pretty much solid for strength, so I'm not exactly planning mass production. The tweeter rings are a bit quicker at about 30 minutes a pair.

If you're interested PM me and we'll sort something out.

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