Provided you get the proper internal volume to a DIY sub, how important is the shape of it? I'm talking about a traditional square sub from MDF. Can you make it long, wide and flat or should it be more square in design to get the best results out of it? Presumably a sub with larger/longer walls will need to be well braced internally to keep the walls from flexing, but are there other considerations as well? ------------------ /Kimmo "Don't tell me; we're about to go over a huge waterfall?" "Yep." "Sharp rocks at the bottom?" "Most likely." "Bring it on."