[KevinH1990]

Here's a link to a thread that I used and added to while upgrading my door speakers. http://986forum.com/forums/boxster-general-discussions/79558-door-speaker-recommendations.html (Edit, it looks like you were the thread starter.) A few of the posts made specific recommendations for after-market amps.

Some of the posts on the thread touch on the issues you face. I drive my car in three configurations: (a) Top down; (b) With soft top up; and (c) With the hard top on. I found that my set up provides good sound with the hard top on, acceptable sound with the soft top up, and poor sound with the top down and at speeds over 25 mph. I expect that adding more power might help overcome the noise inherent with top-down driving, but it isn't worth the effort and expense to me.

I think the answer to your question depends on your goals and your budget. Upgrading the speakers and adding an aftermarket amp for the doors didn't cost much in time or money and met my expectations for sound quality in a sports car. Like you, my head unit provides more power than the Porsche amp I'm using, but I didn't have time to rewire my system to make a change. That would be a relatively inexpensive option and it may be worth consideration. I also highly recommend that you upgrade the door speakers. The upgrade I did provided a noticeable improvement in low frequency sound quality.

Good luck with your project.