Plexi, with acid etched logo or laser cut decal and backlight. Create custom covers that fit snug over the top of the plexi windows. We did a false floor with two art series amps and three JL10W6 (v1) with the JL logo cut out as the plexi cover on the amps. The speakers were in a wall box with a rounded rectangle (showing the back of the subs which fired forward on a wall). The inserts were covered in black carpeting where as the trunk was covered in grey carpeting. Looked good, ran the circuits for a while. Don't know what happened to the guy.