I found this page on how to install the DLS R4 for the e90. (Thanks to Technic). He used a dynamat to fixate the 4" mids in the doors. Here is the link:
I wanted to know if there are alternative ways on doing this besides the dynamat fix? I plan to get the R4's but installing it via dynamt really isnt my thing (though it works). I wanted it to be more like a long term install. I can do with spacers or adapters.
Any input is greatly appreciated.
Thank you guys!