Does anyone have any recommendations, solutions and/or pictures of a 2011 Crew Cab Silverado with subwoofers. The new, fold up, seats have a very tight clearance between the back wall and the seats. I don't think any boxes fit in there and a custom box could still pose an issue. The back seats aren't a full bench, but rather a dual and single fold up. I've been thinking about cutting out the bottom of the seats and attempting to build as sub box within the bottom of the seat. I have seen this in a jeep via youtube but not in a truck yet. I do not want to put anything on the floor of my truck. I regularly have my dogs in the truck with the back seats folded up. I'm open to any and all ideas and would appreciate feedback.