INSTALLATION EXPERIENCE
Installation of PowerBass Autosound Subwoofers requires experience with a variety of mechanical proce-
dures including enclosure construction. This manual only provides general installation and operation in-
structions. If you have any reservations about your installation skills, please contact your local Authorized
PowerBass dealer for assistance.
CHOOSING A SPEAKER ENCLOSURE
The PowerBass Autosound S Thin Subwoofers are engineered to perform at their optimum level in a Sealed en-
closure. However, while not optimum, these woofers may also be used in bandpass enclosures. For maximum
performance we recommend you have your new PowerBass Autosound Subwoofer installed by an Authorized
PowerBass Autosound Dealer.
• SEALED BOX: (RECOMMENDED) A sealed or acoustic suspension enclosure is easy to build
and typically offers a smaller size enclosure and greater power handling. It has the most predict-
able frequency and phase response; the bass response will roll off slower than that of a ported de-
sign. Sealed boxes typically provide the best musical detail and definition. A well-designed sealed
enclosure will exhibit smooth frequency response with excellent sound quality and great low bass
extension. They also exhibit relatively accurate, punchy bass reproduction for most types of music.
If a sealed enclosure is too large to fit into a specific area of a vehicle, it is possible to decrease the
recommended box volume by using 1.5 pounds per cubic feet of low density, high heat specific box
stuffing material. PowerBass recommends Fiberglass, Dacron, Poly-Fill or long fiber wool for stuff-
ing the enclosure. (Decreasing the box enclosure however should not exceed 20% of the
recommended size.) When using any type of box stuffing material be sure that the subwoofer’s
vented pole piece is clear from any obstructions, since covering the pole piece will result in loss of
bass and can possibly cause damage to your subwoofer. The most important aspect of a sealed
enclosure is to make sure that it is airtight and solid. If your enclosure has any air leaks or if the
panels vibrate or flex, you will experience a loss of bass output. Using glue and some type of seal-
ant (caulk) on all seams will ensure a solid constructed box without any air leaks.
