JL Audio 12W1v2-4 Owner's Manual page 2

JL AUDIO 12W1v2-4 / 12W1v2-8
U.S. PATENTS: #5,734,734 #6,501,844 #6,219,431 #D480,709 Other U.S. & Foreign patents pending.
12W1v2 SUBWOOFER PHYSICAL
SPECIFICATIONS
12 in
Nominal Diameter:
300 mm
12.5 in
Overall Diameter (A):
317.5 mm
11.0625 in
Mounting Hole Diameter (B):
281 mm
11.7 in
Bolt Hole Circle (C):
297 mm
4.75 in
Magnet Diameter (D):
121 mm
5.09 in
Mounting Depth (E):
130 mm
8.61 lbs.
Net Weight:
3.90 Kg
0.035 cu. ft.
Driver Displacement:
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" !
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SUBWOOFER 12W1v2-4
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
3.739 cu. ft. 3.539 cu. ft.
Equivalent Compliance (Vas):
105.81 litres 100.15 litres
0.375 in 0.375 in
One-way, Linear Excursion (Xmax)*:
9.5 mm 9.5 mm
Efficiency (1W/1m)**: 86.81 dB SPL 86.80 dB SPL
81.392 sq. in. 81.392 sq. in.
Effective Piston Area (Sd):
0.0525 sq. m. 0.0525 sq. m.
DC Resistance (Re): 4.104 ohm 6.747 ohm
Nominal Impedance: 4 ohm 8 ohm
Power Handling (continuous): 300W
300W
JL AUDIO 12W1v2-4/12W1v2-8
SUBWOOFER
Volume
(net int.)
1.25 cu. ft.
12W1v2-4
35.4 litres
1.25 cu. ft.
12W1v2-8
35.4 litres
SUBWOOFER
Volume
(net int.)
1.75 cu. ft.
12W1v2-4
49.5 litres
1.75 cu. ft.
12W1v2-8
12W1v2-8
49.5 litres
• 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.
JL AUDIO 12W1v2-4/12W1v2-8
All specifications are subject to change without notice.
RECOMMENDED SEALED ENCLOSURES
External Dimensions F3 Fc
Qtc
(Width x Height x Depth) (Hz) (Hz)
17.5 in. x 15.5 in. x 11.5 in.
41.7 41.9 0.733
444.5 mm x 394 mm x 292 mm
17.5 in. x 15.5 in. x 11.5 in.
40.7 43.4 0.796
444.5 mm x 394 mm x 292 mm
RECOMMENDED PORTED ENCLOSURES
Enclosure External Dimensions Slot Port Internal Dimensions
(Width x Height x Depth) (Slot Width x Slot Height x Slot Length)
19.75 in. x 16 in. x 17 in. 1.5 in. x 14.5 in. x 33.75 in.
502 mm x 406.5 mm x 432 mm 38 mm x 368 mm x 857 mm
19.75 in. x 16 in. x 17 in. 1.5 in. x 14.5 in. x 33.75 in.
502 mm x 406.5 mm x 432 mm 38 mm x 368 mm x 857 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
in a hatchback, station wagon, sports utility vehicle, or van.
Tune to: F3
(Hz) (Hz)
28.0 29.5
28.0 30.2
"EL" (Port Extension Length):
12W1v2: 14.5 in. (368 mm)
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