Hey, sorry for the late reply. Have a look at this link:

http://www.boxa.net/forum/index.php?/topic/67332-986-speaker-upgrade-idea/#comment-825148

There's a video on there that explains everything. It's not that hard, but I haven't done it yet as I've been meaning to do other things first!

Hope that helps

Hi, I just picked up my first boxster and found your speaker upgrade question. My boxster is also only fitted with front dash speakers and I am interested in replacement/upgrade options. Did you find any help or useful links? Thanks Rob