Time to do away with the 18" RL-p as it takes up WAY to much room. So I'm downsizing to a 15" SI Mag v3. This will be used both for moves and music and running off of 800rms. So far WinISD likes 4ft^3 tuned to 25hz, and 3 3" ports that are 22" long. Whats everybodys thoughts before I start getting with sketchup and all?