I need just solid state doors top to bottom to enclose the cabin. Currently have front and back windshield. I have one of those fabric ones and it is on with Velcro which is the pits. in fact in a storm last winter it ripped off the top and was ruined anyway..Velcro sucks. in addition its difficult at best to unzip doors etc..
I'm still researching getting a bass amp in either micro head plus speaker or combo form. I have a limited budget. So then I was thinking, people make their own sub-woofer cabinets for their cars. These people aren't rocket scientists or genius PhD people, just everyday people who can assemble things with hand tools.