JL Audio 8W1v2-4 User Manual
8W1v2-4 / 8W1v2-8
Subwoofers
owner’s manual
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.
A
C
D
B
E
JL AUDIO 8W1v2-4 / 8W1v2-8
U.S . PATENTS: # 5,734, 734 #6, 501,84 4 #6,219,431 #D48 0,709 O ther U. S. & Fore ign pate nts pen ding.
All specifications are subject to change without notice.
SUBWOOFER RECOMMENDED SEALED ENCLOSURES
8W1v2 SUBWOOFER PHYSICAL
SPECIFICATIONS
Nominal Diameter:
Overall Diameter (A):
Mounting Hole Diameter (B):
Bolt Hole Circle (C):
Magnet Diameter (D):
Mounting Depth (E):
Net Weight:
Driver Displacement:
8 in
200 mm
8.54 in
217 mm
7.09 in
180 mm
7.85 in
199 mm
4.54 in
115 mm
3.85 in
98 mm
6.3 lbs
2.9 kg
0.02 ft³
0.57 l
SUBWOOFER 8W1v2-4 8W1v2-8
Free Air Resonance (Fs): 34.55 Hz 36.60 Hz
Electrical “Q” (Qes): 0.508 0.612
Mechanical “Q” (Qms): 6.260 6.000
Total Speaker “Q” (Qts): 0.470 0.555
Equivalent Compliance (Vas):
One-way, Linear Excursion (Xmax)*:
Efficiency (1W/1m)**: 83.86 83.58
Effective Piston Area (Sd):
DC Resistance (Re): 4.00 ohm 7.84 ohm
Nominal Impedance: 4 ohm 8 ohm
* 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” !
Power Handling (continuous): 150W 150W
0.66 ft³
18.80 l
0.3 in
7.6 mm
32.67 in²
0.0211 m²
32.67 in²
0.0211 m²
0.63 ft³
17.87 l
0.3 in
7.6 mm
Volume
(net int.)
8W1v2-4
8W1v2-8
SUBWOOFER RECOMMENDED PORTED ENCLOSURES
8W1v2-4
8W1v2-8
• 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.
• All enclosure volumes listed are net internal volumes!
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.
• 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).
• 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.
0.375 ft³
10.6 l
0.375 ft³
10.6 l
Volume
(net int.)
0.50 ft³
14.2 l
0.50 ft³
14.2 l
Enclosure External Dimensions
External Dimensions
(Width x Height x Depth)
10.5 in x 10.5 in x 10 in
267 mm x 267 mm x 254 mm
10.5 in x 10.5 in x 10 in
267 mm x 267 mm x 254 mm
(Width x Height x Depth)
12.5 in x 10 in x 11.5 in
318 mm x 254 mm x 292 mm
12.5 in x 10 in x 11.75 in
318 mm x 254 mm x 298 mm
!!
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.
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
CAUTION
in a hatchback, station wagon, sports utility vehicle, or van.
!!
F3
(Hz)Fc(Hz)
52.5 57.4 0.78
50.0 60.0 0.91
Round Port Specs
(Inner Diameter x Length)
2 in x 10 in
51 mm x 254 mm
2 in x 14 in
51 mm x 356 mm
Qtc
Round port requires a 90˚ elbow
to fit in the specified enclosure
Round port requires a 90˚ elbow
to fit in the specified enclosure
Port Information
Tune to:
(Hz)
38 34.7
33 35.5
F3
(Hz)
2 JL AUDIO 8W1v2-4/8W1v2-8 JL AUDIO 8W1v2-4/8W1v2-8 3