Nova Speaker Installation
By: Udo Brackmann 

Introduction

Because the sound is not the best with the original speakers, I've decided to insert a new Combo-system in replacement of the original one. I've chosen a 16cm (6,5") Combo-system (Nova Comb 6.1; 80W RMS) from Intertechnik here in Germany, because of the price (~150,- Euro) and the tweeter fits nearly without changes to the original factory hole, so that I can reinstall the stock speakers if I sell the car (in a far far future), but you can use nearly any 6.5" system.


Installation
The first step is to remove the door panels, (this was described earlier in this magazine) then remove the speakers with 4 screws
Remove panel to reveal the speakers
The next step was the most complicated part. The woofer needs 70mm in the door and there are only 55mm, additionally there is 35mm room to the door panel, which has to be filled for better acoustic. So I've taken a 22mm thick MDF panel and created 2 rings according to the shape of the original speakers. 

For the screws AND later to fit in the door-panel you have to make the panel at the screws only 8-9mm thick. 
The MDF speaker mounting ring
On the next picture you see the backside of the door panel. The tweeter is already in place. I've fixed the cables with a hot glue gun - aka "Heissklebepistole". 

With the same hot-glue method I've mounted the Cross-Over directly underneath a hole of the armrest.
Backside of the door panel
Here you can see the switch to adjust the tweeter level through the armrest from outside the door.
Tweeter level control
I've installed the input for the Cross-Over directly at the cables for the original speaker after I've cut the connectors. And finally here are the pictures after reinstalling the door-panels of the tweeter.
Front view of tweeter
And the view of the installed woofer.
Front view of woofer
Udo Brackmann
Bergheim, Germany

www.brackmanns.de