Subwoofer box was primarily constructed of 5/8" particle board

Cardboard was used to deal with difficult angles and to maximize internal volume

Fiberglass was applied to the cardboard sections

Spray-painted

Final test fit

A recessed mounting ring allowed for a flush-mount

Polyfill was used to compensate for the small enclosure

Kenwood 8" shallow-mount subwoofer

Installed inside of the center console

Rockford Fosgate mono block class D amplifier

Mounting board with ventilation holes

Mounted to the board

Wired

Inverted installation under the steering column

Amplifier gain control mounted in the lighter area

Amplifier kill switch installed inside the ashtray