I bought a set of enclosures (particle board and covered with fabric) for a lot less than what I could have made them. They were for 6.5" round spkrs and I put them behind the rear seat in my sedan. Sound improvement wasn't worth the cost or the time to install them. Hate like hell to have to pull out the rear custom interior to mount speakers behing the panels, but it has to be better than the enclosures. If not, think I will just sing to myself.