[Blaa]

Hi..

I've got an 318d from 2010 with Navi Prof, but the base audio system. As in no tweeters in the front doors. I want to try to upgrade the audio system a little and my plans are like this:

Blaupunkt THA 55 PNP amplifier
Earthquake SWS8 'subs' the 2 Ohm version..
DLS PS4 4" component system.

I know from looking at pictures here on the forum that the stock speakers are mountet with 3 bolts, and the DLS 4" wont fit with those mounting points so I'll have to make some kind of adapter to make the DLS work with the original mountings.

So my question today is... drumroll.... Does anybody know the radius from the center of the stock BMW 4" speaker to the mounting points? Planning of making the adapter out of 1/8" MDF or something like that, and it would be nice to know how big my MDF adapters would have to be even before I start installing the new speakers.

Thanks for all your help in advance.