I'm upgrading the stock (10 speaker, non-HK) system in my e36 (1995 325is coupe). I have 2-way CDT components for the front (5.25" EF-51, with TW-25 Pro Tweeters), then some CDT 6x9's for the rear with the 6x9 adapters. New amp too.
While waiting for the rest of the drivers and adapters, I installed the 5.25" drivers in the kick panels while keeping the rest of the stock system in place. The nokia's are 4 ohm there, so didn't thing dropping these in with the existing setup would be a problem. I'm a novice with this stuff, buy have tried to read up as much as I can here.
The issues is the bass from the CDT's sound pretty muddy (not sure if that's the right term) compared to the nokias. The stock setup has black foam rubber cups in place, and I'm wonder if there is an issue with sealing here. I thought I could just drop them in place, but maybe not. Can the issue here be improper sealing? Any advice is appreciated.
Here is the black foam rubber cups in place.
Here it is removed
Sheet metal behind the cups
Nokia and CDT drivers
And the CDT driver in place (passenger and driver side)