Building an Enclosure for a Porsche 911 Turbo

With its 480-horsepower twin-turbo engine, the Porsche 911 Turbo is a performance machine, but the audio system is often in need of an upgrade. In this case, the customer wanted more “boom” in his trunk.

Michael Harootunian of AudioMax in Walpole, Mass., was more than happy to deliver those goods. In less than two days, Harootunian constructed a fiberglass enclosure for a pair of Boston Acoustics subwoofers in the car’s rear deck.

Before you wonder if the enclosure obstructs any views in the rear mirror, remind yourself that when you drive this type of car, you may not look back as often, because few cars can stay in your rearview mirror for long.

An MDF base is started and made to the basic shape of the vehicle’s floor.

The MDF base is finished out. MDF rings are set in place with flexible brackets to determine exact woofer placement.

The rings are now permanently secured and fleece is stretched in preparation of the fiberglass resin.

The resin- and fiberglass-reinforced filler is applied. This is a good time for a test fitting.

A skim coat of body filler is applied and sanded before the enclosure heads to the paint booth.

The finished enclosure is wired and ready to be installed.

The final enclosure shown installed from the outside of the rear window with a pair of Boston Acoustics subwoofers.