JL Audio 12W1v2-4, 12W1v2-8 Owners Manual
12W1v2-4 / 12W1v2-8
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.
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JL AUDIO 12W1v2-4 / 12W1v2-8
U.S . PATENTS : #5,734,7 34 #6,5 01,844 #6 ,219,431 #D48 0,709 Ot her U.S. & F oreign pa tents pe nding.
All specifications are subject to change without notice.
SUBWOOFER RECOMMENDED SEALED ENCLOSURES
Volume
(net int.)
12W1v2-4
12W1v2-8
SUBWOOFER RECOMMENDED PORTED ENCLOSURES
12W1v2-4
12W1v2 SUBWOOFER PHYSICAL
Mounting Hole Diameter (B):
SPECIFICATIONS
Nominal Diameter:
Overall Diameter (A):
Bolt Hole Circle (C):
Magnet Diameter (D):
Mounting Depth (E):
Net Weight:
Driver Displacement:
12 in
300 mm
12.5 in
317.5 mm
11.0625 in
281 mm
11.7 in
297 mm
4.75 in
121 mm
5.09 in
130 mm
8.61 lbs.
3.90 Kg
0.035 cu. ft.
0.99 litres
* 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” !
SUBWOOFER 12W1v2-4 12W1v2-8
Free Air Resonance (Fs): 23.68 Hz 24.98 Hz
Electrical “Q” (Qes): 0.443 0.493
Mechanical “Q” (Qms): 6.465 6.451
Total Speaker “Q” (Qts): 0.414 0.458
Equivalent Compliance (Vas):
One-way, Linear Excursion (Xmax)*:
Efficiency (1W/1m)**: 86.81 dB SPL 86.80 dB SPL
Effective Piston Area (Sd):
DC Resistance (Re): 4.104 ohm 6.747 ohm
Nominal Impedance: 4 ohm 8 ohm
Power Handling (continuous): 300W 300W
3.739 cu. ft.
105.81 litres
0.375 in
9.5 mm
81.392 sq. in.
0.0525 sq. m.
3.539 cu. ft.
100.15 litres
0.375 in
9.5 mm
81.392 sq. in.
0.0525 sq. m.
12W1v2-8
• 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 biamplified 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.
1.25 cu. ft.
35.4 litres
1.25 cu. ft.
35.4 litres
Volume
(net int.)
1.75 cu. ft.
49.5 litres
1.75 cu. ft.
49.5 litres
External Dimensions
(Width x Height x Depth)
17.5 in. x 15.5 in. x 11.5 in.
444.5 mm x 394 mm x 292 mm
17.5 in. x 15.5 in. x 11.5 in.
444.5 mm x 394 mm x 292 mm
Enclosure External Dimensions
(Width x Height x Depth)
19.75 in. x 16 in. x 17 in.
502 mm x 406.5 mm x 432 mm
19.75 in. x 16 in. x 17 in.
502 mm x 406.5 mm x 432 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)
41.7 41.9 0.733
40.7 43.4 0.796
Qtc
Slot Port Internal Dimensions
(Slot Width x Slot Height x Slot Length)
1.5 in. x 14.5 in. x 33.75 in.
38 mm x 368 mm x 857 mm
1.5 in. x 14.5 in. x 33.75 in.
38 mm x 368 mm x 857 mm
Tune to:
(Hz)
28.0 29.5
28.0 30.2
“EL” (Port Extension Length):
12W1v2: 14.5 in. (368 mm)
F3
(Hz)
2 JL AUDIO 12W1v2-4/12W1v2-8 JL AUDIO 12W1v2-4/12W1v2-8 3
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