5
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
MULTI ENCLOSURE COMPATIBILITY
the PowerBass Autosound Subwoofers are engineered to perform
well in various types of enclosures. These subwoofers offer the versatility of being used in either sealed,
vented or band-pass enclosures. For maximum performance we recommend you have your new Power-
Bass Autosound Subwoofer installed by an Authorized PowerBass Autosound Dealer.
• SEALED BOX:
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 predictable frequency and
phase response; the bass response will roll off slower than that of a ported design. 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 stuffing 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 sealant (caulk) on all
seams will ensure a solid constructed box without any air leaks.
