Rockville RS6X9-4 6x9 Speaker Enclosure Box, Double-Angle Design, 4-Hole Mounting, MDF Construction, for Car Audio Enthusiasts

This is a very well built 6x9 4 speaker box. Made from 3/4" MDF. It's heavy duty and also well sealed.I added the fiber-fill polyester lining to help deepen the bass frequencies, but I'm using a cross-over board and filtering 12db at 100Hz. anyways. Installed the box in the back of my mini van using MB Quart speakers running from a 4-Channel Audiobank 1000 watt amp. The sound of the rear staging is awesome clean.

This box is very porly built. To start with the box it arrived in was damaged and tore open. Then when i removed the speaker box itself the speaker wire connectors on the back actully fell out they were not attatched to the box at all and they are were cheaply made connectors when thin plastic little spring connectors then the spade connectors are very very thin they bend just trying to connector the wire from the speaker they are so thin i had to flated out the female spade connector on speaker wire so it would make good connection and stay on then the box itself the carpet was not attached around 1 of the speaker holes then around another speaker hole the plywood itself had split in the center and had come apart...if you get a good one or willing to put a little time in fixing it up the box does sound good and appears to be 1 of the only options for a 4 hole 6x9 box on amazon