DIY Network

other tools and materials:
speaker components and power amp
linear actuator
medium-density fiberboard
piano hinges
cardboard
utility knife
wood glue
masking tape
black carpet
spray paint
spray adhesive

Important: Included in this summary are the steps in this automotive procedure as shown in the episode. These steps are general guidelines that are applicable to most vehicles. With any particular car or truck, there may be procedures, specifications, settings, tolerances, components, etc. that are specific to that vehicle. There are also variations according to the type and brand of upgrade-kit or replacement part that you select. Always consult your vehicle's service manual when undertaking significant automotive repairs, and read and follow the manufacturer's directions and precautions that come with your kit or replacement parts.

Safety Alert: As a standard safety precaution, always disconnect the vehicle's negative battery cable before you begin work on any electrical or mechanical components.

Safety Alert: Always wear eye protection and follow proper safety precautions when working with power tools or pneumatic tools. Also wear eye protection any time you are working underneath a vehicle or working with caustic or dangerous chemicals.

The Project Car: 1992 Nissan 300ZX

The last generation 300ZX is a solid, well-built sports car. It's simple futuristic design was a real shocker in 1990, and still holds up well today. In good condition, they're reliable enough to drive every day, and there are tons of aftermarket parts and products that will help an old z car hold it's own against newer models on the track.

This one is a primo example, mostly in original condition but with a few carefully chosen upgrades to keep the Z's performance up to date.

The cherry-red pearl metallic paint still shines like new, and the Z rides tight on lowered sport springs and 18-inch aftermarket rims.

Inside this red hot 2-seater, driver and passenger are treated to original cloth covered sport seats. The dash design was so ahead of its time in 1992 that it still looks great.

An aftermarket air and fuel control computer lets the owner tweak engine settings from inside the car.

Under the hood, a twin-turbocharged 4-cyllinder engine is tuned to pump plenty of power — through the 3" cat-back exhaust system.

Sub-Box Considerations

Materials play a big part in sub box design. Most sub boxes are built from medium density fiberboard and covered with carpet, but fiberglass is also popular. Some people even opt for clear acrylic enclosures (figures A and B). The type of enclosure can have a big impact on sound. Ported enclosures deliver the most volume per watt, but sealed boxes are more compact and deliver tighter bass response.

Acrylic subwoofer enclosure

The acrylic sub-box was created in Tricked Out episode 113.

You'll also want to consider basic practicality. Car subs can range in size and scope quite a bit (figures C and D) — anywhere from the size of a shoebox to taking up the entire backseat, or more. Use some common sense and think about how you use your car before you decide on the size and scope of your own personal earthquake machine.

An entire trunk dedicated to bass

Mega-bass taken to the extreme. There's room for a driver and not much else.

Want to see what kind of sonic technology is in store for the rearward recesses of this particular Z-car? If you're not afraid of some deep bass and heavy volume, read on.

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