Power bass Autosound S-84, Autosound S-1004, Autosound S-84D, Autosound S-1004D, Autosound S-1204 Application & Enclosure Manual
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Autosound "S" Series Subwoofer
Application & Enclosure Guide
Please read through this manual to familiarize yourself with your new speakers. Should your PowerBass
Autosound subwoofer ever require service, you will need to have the original dated receipt.
S-84
S-84D
S-1004
S-1004D
S-1204
S-1204D
S-84D
Thank you and Congratulations
Congratulations on your decision to purchase PowerBass “S” series woofers. You now own a woofer of
uncompromising design and engineering philosophy from a factory that truly believes in the relentless
pursuit of perfection. Incorporating the highest quality parts and state-of-the-art materials, these woofers
display the ultimate balance between high fidelity, extreme performance and long-lasting reliability.
At PowerBass USA, Inc. we are confident you will have many years of outstanding enjoyment from your
superior subwoofer investment. For maximum performance we recommend that you have your new
PowerBass “S” series Woofer installed by an Authorized PowerBass Dealer.
To learn more about PowerBass, please visit us on the World Wide Web at
http://www.powerbassusa.com
∆ Warning ∆
Continuous exposure to sound pressure levels in excess of 100 dB can cause permanent hearing loss. PowerBass Autosound Speakers
are capable of producing sound pressure levels well over 170 dB. Please observe all local sound ordinances while listening to your
PowerBass Autosound system. PowerBass USA, Inc. accepts no liability for hearing loss, bodily injury, or property damage due to the
result of use or misuse of this product.
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POWERBASS AUTOSOUND "S" WOOFER FEATURES
Improved 4-layer Black Paper/Wool Cone: The premium grade cones on these subwoofers are delicately balanced mix between Wool and Paper pulp. This results in a extremely warm and accurate sound
while remaining exceptionally stable even under the stress of high sound pressure levels.
Large Roll Foam Surround: This treated large roll surround is used to ensure long and linear travel
throughout the entire excursion range resulting in more bass output and higher SPL.
Rigid Tooled Stamped Basket with Voice Coil Perimeter Aero-Vents: This thick stamped steel basket is
manufactured to the highest standards to ensure maximum excursion, exceptional alignment of the subwoofers
motor structure and moving parts. A new basket coating offers improved damping and reduced resonance.
Vented Motor Structure: Just like a car’s engine, the motor structure of a woofer drives the cone. This
bumped and vented magnet assembly will allow your S-series woofer to handle lots of power while delivering
accurate linear movement for tight deep bass.
Chrome Push Input Terminals: These high strength compression loaded speaker terminals ensure
maximum current and power transfer.
Injection Molded Dust Cap: This newly redesigned larger dust cap reduces resonance and possible
distortion along with non-linear movement.
2” BASV High Temperature Voice Coil: These specially designed resin coated high temperature voice
coils ensure high power handling and precise linear excursion while maximizing thermal heat dissipation.
Rubber Mounting Gasket: The protective rubber-mounting gasket ensures an airtight seal which eliminates bass robbing air leaks.
Single and Dual 4-ohm Voice Coil: Made with pure PIW wire for multiple woofer applications and high
energy and heat transfer. This makes the voice coil highly efficient, and allows you to play louder for longer.
Optimally Designed for Both Sealed and Ported Enclosures: for many sonic and installation applications. This gives you a wide range of uses for the S-Series Woofers.
WIRING GUIDELINES
It is highly recommended that you seek an authorized PowerBass dealer to properly setup, wire
and install your woofers for maximum performance.
There are multiple ways to wire your woofers depending on your amplifier and system configuration. The use
of multiple voice coils offers you more versatility in system configuration. It is important to know the limits of
your amplifier to optimize its performance. It is always better to use your subwoofer in a mono / bridged mode
if your amplifier has the capabilities. There are basically four different types of wiring configurations: Series,
Parallel, Series-Parallel or Parallel-Parallel. It is possible to change the impedance or load by how the speakers
are to be wired and by the quantity of woofers used.
Parallel wiring a dual 4 ohm sub = 2 ohm
Parallel-Parallel wiring two dual 4 ohm subs = 1 ohm
Series-Parallel wiring two dual 4 ohm subs = 4 ohm
NOTE: Never connect only one coil of a Dual Voice Coil (DVC) speaker. BOTH voice coils must be
connected to the amplifier
DUAL VOICE COIL WIRING
PARALLEL
SERIES
SERIES PARALLELPARALLEL-PARALLEL
Series wiring a dual 4 ohm sub = 8 ohm
Amplifier
Amplifier
Amplifier
Amplifier
SINGLE VOICE COIL WIRING
Parallel wiring of two single 4 ohm subs = 2 ohms
Parallel wiring of four single 4 ohm subs = 1 ohms
Series/ Parallel wiring of four single
4 ohm subs = 4 ohms
Single 4 ohm woofer
Amplifier
STANDARD
PARALLEL
Amplifier
PARALLEL
Amplifier
SERIES-PARALLEL
Amplifier
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INSTALLATION EXPERIENCE
Installation of PowerBass Autosound Subwoofers requires experience with a variety of mechanical procedures including enclosure construction. This manual only provides general installation and operation instructions. 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 PowerBass 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.
• VENTED BOX: Also known as a ported or bass reflex enclosure, this type of box is almost as easy
to construct as a sealed enclosure. This design however is more efficient and results in an increase
of bass output at certain frequencies. Although vented enclosure has an output advantage at some
frequencies, it also has a steeper roll off, which will only affect bass frequencies below port tuning. Air inside the port will move in phase with the subwoofer reinforcing frequencies above the F3
(-3dB point). The SPL advantage of the vented enclosure comes from the fact that the effect of the
vent tuning reduces the excursion of the subwoofer near the tuning frequency allowing more SPL
to be produced before the subwoofer bottoms. Damping material should also be used to line the
internal walls to reduce any sonic reflection. Because of the characteristics of a vented enclosure,
subwoofers typically will become unloaded (act as if it is not in a box) at frequencies of ½ octave
below the enclosure tuning frequency. Using a high pass filter / subsonic filter will help prevent the
subwoofer from unloading or exceeding its excursion capabilities. It is important to stay within the
recommended enclosure designs. (PowerBass recommends port placement to coincide on
the same panel or baffle that the subwoofer resides on.)
• BANDPASS ENCLOSURE: The most common band-pass enclosure is a combination of a sealed
and a vented enclosure working together (4th order or single reflex band-pass system). The rear of
the speaker goes into the sealed chamber while the front of the speaker goes into the vented chamber. Because the vent produces all the sound generated from this type of enclosure, sound quality
may not be as good as a well-designed ported or sealed design. Often the sacrifice for sound quality
and subwoofer cone control is greater SPL output. However unlike a sealed or vented enclosure,
you can effectively increase the enclosure sensitivity with the appropriate tuning choices. You can
choose to design a narrow frequency band with very high sensitivity or choose a wide frequency
band with the sacrifice of lower sensitivity. The damping effect of the vented chamber reduces the
motion of the cone so that potentially higher sound output is achieved without the subwoofer reaching its mechanical limits. Minor deviations from design recommendations however may result in
frequency response and distortion problems.
(If you are intending to use multiple subwoofers in your system, PowerBass recommends hav-
ing separate chambers for each subwoofer if the subwoofers will be operated by two different
amplified signals. This will prevent any possible cancellation.)
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