JL Audio Speaker 8W1v2 4 User Manual

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” !  
2
JL AUDIO 8W1v2-4/8W1v2-8  
JL AUDIO 8W1v2-4/8W1v2-8  
3
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