JL Audio 8W1v2-4 - Manual (Page 2)

2 JL AUDIO 8W1v2-4/8W1v2-8 JL AUDIO 8W1v2-4/8W1v2-8 3
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):
0.66 ft³
18.80 l
0.63 ft³
17.87 l
One-way, Linear Excursion (Xmax)*:
0.3 in
7.6 mm
0.3 in
7.6 mm
Efficiency (1W/1m)**: 83.86 83.58
Effective Piston Area (Sd):
32.67 in²
0.0211 m²
32.67 in²
0.0211 m²
DC Resistance (Re): 4.00 ohm 7.84 ohm
Nominal Impedance: 4 ohm 8 ohm
Power Handling (continuous): 150W 150W
* 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 RECOMMENDED SEALED ENCLOSURES
Volume
(net int.)
External Dimensions
(Width x Height x Depth)
F3
(Hz)
Fc
(Hz)
Qtc
8W1v2-4
0.375 ft³
10.6 l
10.5 in x 10.5 in x 10 in
267 mm x 267 mm x 254 mm
52.5 57.4 0.78
8W1v2-8
0.375 ft³
10.6 l
10.5 in x 10.5 in x 10 in
267 mm x 267 mm x 254 mm
50.0 60.0 0.91
All specifications are subject to change without notice.
A
C
D
B
E
8W1v2 SUBWOOFER PHYSICAL
SPECIFICATIONS
Nominal Diameter:
8 in
200 mm
Overall Diameter (A):
8.54 in
217 mm
Mounting Hole Diameter (B):
7.09 in
180 mm
Bolt Hole Circle (C):
7.85 in
199 mm
Magnet Diameter (D):
4.54 in
115 mm
Mounting Depth (E):
3.85 in
98 mm
Net Weight:
6.3 lbs
2.9 kg
Driver Displacement:
0.02 ft³
0.57 l
JL AUDIO 8W1v2-4 / 8W1v2-8
!!
CA
UTION
!!
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.
• 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.
U.S. PATENTS: #5,734,734 #6,501,844 #6,219,431 #D480,709 Other U.S. & Foreign patents pending.
SUBWOOFER RECOMMENDED PORTED ENCLOSURES
Volume
(net int.)
Enclosure External Dimensions
(Width x Height x Depth)
Round Port Specs
(Inner Diameter x Length)
Port Information
Tune to:
(Hz)
F3
(Hz)
8W1v2-4
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
38 34.7
8W1v2-8
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
33 35.5