Sealed enclosures offer a range of performance
proles depending on the internal air volume.
Larger enclosures will have a smoother more
extended response while a small enclosure
will have increased output in a more focused
frequency range. Sealed enclosures are the
simplest to construct but do require that the box
be completely air tight.
• Use 3/4” MDF
• Make sure the woofer mounting panel is
full width and height
• Glue all mating surfaces
• Use wood screws
• Use silicone caulk on all internal joints
The internal volume of the
enclosure must be determined
to insure proper performance.
Simply measure height, width and
depth of enclosure you intend
to build. Subtract the material
thickness. Multiply these numbers
and divide by 1728 to get the
volume in cubic feet.
For enclosures with an angled
panel, measure the larger and
smaller depths, add these
together and divide by two. Use
this averaged depth.
Enclosure
Volume
D
H x W x D
1728
D1 + D2
2
Sealed
Vented
Enclosure types
Volume calculation
Subwoofer dimensions
CAUTION
Always consider consulting a professional audio installer
before installing new subwoofers. High power audio
systems have the ability create sound levels above 130dB.
Extended exposure to high sound pressure levels can
cause hearing damage.
Always run any new wiring through safe areas that wont
interfere with the normal operation of the vehicle.
Congratulations on your choice of a Hifonics subwoofer.
This “Quick Start Installation” guide is meant to help you
“hook up” and play music. For more detailed information
on system setting, speaker and subwoofer conguration,
and full specications by model, visit the website at
Hifonics.com
It’s a good idea to conrm that you have purchased the
correct size subwoofers to t your vehicle. If you have any
reservations about being able to complete the installation
yourself, we recommend contacting a professional. Be careful
as you go. Always disconnect the negative battery terminal
before starting any electrical work on the vehicle.
BXS8D4 BXS10D4 BXS12D4
Height 12.5” 13” 14.5”
Width 12.5” 13” 14.5”
Depth 9.0” 10” 10.25”
Vb 0.5 ft
30.65 ft30.75 ft3
F3 46 Hz 42 Hz 40 Hz
Qtc .866 .959 1.10
BXS8D4 BXS10D4 BXS12D4
Height 12.5” 13.5” 14.5”
Width 17.5” 18.5” 19.5”
Depth 1 5.5” 6.0” 6.0”
Depth 2 7.5” 8.0” 8.0”
Vb 0.5 ft30.65 ft30.75 ft3
F3 46 Hz 42 Hz 40 Hz
Qtc .866 .959 1.10
Before you start
Rectangular
Angled
Recommended enclosures
Enclosure construction
in(mm) A B C D
BXS8D4 8.43”(214) 2.77”(70) 7.17”(182) 0.57”(14.4)
BXS10D4 10.31”(262) 2.93”(74) 9.06”(230) 0.67”(17)
BXS12D4 12.28”(312) 3.00”(76) 10.59”(269) 0.96”(24)
A
B
D
C
Vented designs are NOT recommended. This
subwoofer is designed to perform in small
sealed enclosures.
