Upgrading V50 Stereo

[jigharha]

Sorry I mess up my first posting.
Here go;
Has anyone upgraded a high performance?

I have the high performance, which is a very good system but I think I would have gone for the premium sound when I ordered my car.

Now I am wondering if I can add a tweeter to the lower part of the back door, where have the base speakers. The premium sound has a tweeter attached to the base speaker.


I know the premium sound has two tweeters on every door. High performance has two on the front doors but one on the back doors. The basic has one on the fronts doors but none on the back doors.

For the basic, many have upgraded theirs by adding tweeters to the top frame of the back door without any software application.

My question for the high performance is that, is there any plug-in for tweeters at the lower base speakers as the premium sound? If I go ahead and change my speakers from 40 watts to 70 watt (from a wreck V50), would I need a software application for this change and would my amp be strong enough to carry this change?

Has anyone done this?[/QUOTE]