Here's a few pics of the stereo system I built for my K5. It's not perfect, but it works for me. For those of you who have a rollbar in your K5 and want to build boxes into the side to fit subwoofers, this was my solution. I built the side panels and sub boxes out of 3/4" MDF, sealed them, and carpeted them. I also mounted the amp behind the panel and cut a door out to make a lockable box. I bolted everything down because I have the top off alot here in San Diego. Sorry for the crappy cell phone pics, but hopefully this helps somebody. The setup is: 2 JL Audio 10w04's, Rockford Fosgate p5002 500watt rms Amp, 4 Boston Acoustic 6.5 mid/highs, Panasonic mp3 deck.