8W1v2-4 / 8W1v2-8
Subwoofers
o w n e r ’ s m a n u a l
Congratulations on your purchase of a JL Audio subwoofer component. Your JL Audio subwoofer is a
precision loudspeaker which has been engineered to produce the highest quality sub-bass performance
in your vehicle. Authorized JL Audio dealers have extensive technical information for many different
applications of your new speaker. They also have the knowledge, skills and tools to build a high-quality
enclosure that will maximize the performance of your speaker. We highly recommend that you have your
enclosure built by an authorized JL Audio dealer.
Inside you will find specifications and two recommended enclosures for your speaker; one is a sealed
enclosure, the other is a ported design. Both types of enclosures will give you excellent sound quality and
low-frequency extension. The sealed enclosure is a better choice if space is extremely tight, but the ported
enclosure will produce 3dB more output at the same power if you have the extra space to work with.
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All specifications are subject to change without notice.
JL AUDIO 8W1v2-4 / 8W1v2-8
SUBWOOFER
RECOMMENDED SEALED ENCLOSURES
U.S. PATENTS: #5,734,734 #6,501,844 #6,219,431 #D480,709 Other U.S. & Foreign patents pending.
Volume
(net int.)
External Dimensions
(Width x Height x Depth)
F3
(Hz)
Fc
(Hz)
Qtc
0.375 ft³
10.6 l
10.5 in x 10.5 in x 10 in
267 mm x 267 mm x 254 mm
8W1v2-4
8W1v2-8
52.5
50.0
57.4
60.0
0.78
0.91
C
0.375 ft³
10.6 l
10.5 in x 10.5 in x 10 in
267 mm x 267 mm x 254 mm
B
D
E
A
SUBWOOFER
RECOMMENDED PORTED ENCLOSURES
Volume
(net int.)
Enclosure External Dimensions
Round Port Specs
(Inner Diameter x Length)
Tune to:
(Hz)
F3
(Hz)
Port Information
(Width x Height x Depth)
0.50 ft³
14.2 l
12.5 in x 10 in x 11.5 in
318 mm x 254 mm x 292 mm
2 in x 10 in
51 mm x 254 mm
Round port requires a 90˚ elbow
to fit in the specified enclosure
8W1v2-4
8W1v2-8
38
33
34.7
35.5
0.50 ft³
14.2 l
12.5 in x 10 in x 11.75 in
318 mm x 254 mm x 298 mm
2 in x 14 in
51 mm x 356 mm
Round port requires a 90˚ elbow
to fit in the specified enclosure
8W1v2 SUBWOOFER PHYSICAL
SPECIFICATIONS
SUBWOOFER
Free Air Resonance (Fs):
8W1v2-4
34.55 Hz
0.508
8W1v2-8
36.60 Hz
0.612
8 in
Nominal Diameter:
200 mm
Electrical “Q” (Qes):
Mechanical “Q” (Qms):
Total Speaker “Q” (Qts):
•The enclosure recommendations listed are external
dimensions which assume the use of 3/4" (19mm)
thick material. If you are using 5/8" (16mm) thick
material, subtract 1/4" (6.5mm) from each dimension.
Do not use any material with a thickness of less than
5/8" (16mm) as this may compromise the rigidity of
the enclosure.
8.54 in
Overall Diameter (A):
217 mm
6.260
6.000
0.470
0.555
7.09 in
Mounting Hole Diameter (B):
180 mm
0.66 ft³
18.80 l
0.63 ft³
17.87 l
Equivalent Compliance (Vas):
7.85 in
Bolt Hole Circle (C):
199 mm
0.3 in
7.6 mm
0.3 in
7.6 mm
• Allenclosurevolumeslistedarenetinternalvolumes!
Box volume displacement, port displacement and
brace displacement must be added to obtain the final
gross internal volume.All enclosure dimensions listed
have already taken this into account.
One-way, Linear Excursion (Xmax)*:
Efficiency (1W/1m)**:
4.54 in
Magnet Diameter (D):
115 mm
83.86
83.58
3.85 in
Mounting Depth (E):
98 mm
32.67 in²
0.0211 m²
32.67 in²
0.0211 m²
Effective Piston Area (Sd):
• When using two subwoofers in
a
common
enclosure simply double the required volume and,
in the case of a ported enclosure, use two times the
recommended port(s).
6.3 lbs
Net Weight:
2.9 kg
DC Resistance (Re):
Nominal Impedance:
4.00 ohm
4 ohm
7.84 ohm
8 ohm
Prolonged exposure to sound pressure levels in excess of 100dB can cause permanent hearing loss. This high-performance
speaker can exceed this level. Please exercise restraint in its operation in order to preserve your ability to enjoy its fidelity.
0.02 ft³
Driver Displacement:
0.57 l
Power Handling (continuous):
150W
150W
• We recommend the use of this speaker in a bi-
amplified system using high-quality satellite speakers
and amplifiers. We do not recommend the use of
this subwoofer with a passive crossover (coil),as this
type of device will adversely affect performance.
When installing a subwoofer in your vehicle, it is extremely important to secure the enclosure firmly. We recommend
bolting the enclosure through the metal of the floorpan or the frame of the vehicle with large diameter washers for
reinforcement. If an enclosure is not firmly attached, it can become a projectile in a collision. This is particularly important
in a hatchback, station wagon, sports utility vehicle, or van.
* Xmax specifications are derived via one-way voice coil overhang method with
no correction factors applied.
** Efficiency (1W/1m) is not an accurate indicator of a subwoofer’s output capability and should
not be used as a comparison to other subwoofers to determine which one is “louder” !
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JL AUDIO 8W1v2-4/8W1v2-8
JL AUDIO 8W1v2-4/8W1v2-8
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