JL Audio 12WX-4, 12WX User Manual

OWNER’S MANUAL

Subwoofer Driver

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

B

E

D

C

JL AUDIO 12WX-4

U.S. PATENT: #6,219,431

12WX 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:

12.0 in.
305 mm

12.52 in.
318 mm

11.0625 in.
281 mm

11.7 in.
297 mm

4.13 in
105 mm

5.3 in.
135 mm

5.8 lbs.

2.63 kg

3

0.048 ft

1.36 liters

SUBWOOFER 12WX-4

Free Air Resonance (Fs): 27.43 Hz

Electrical “Q” (Qes): 0.596

Mechanical “Q” (Qms): 9.970

Total Speaker “Q” (Qts): 0.562

3

Equivalent Compliance (Vas):

One-way, Linear Excursion (Xmax)*:

3.337 ft

94.49 liters

0.375 in.

9.5 mm

Efficiency (1W/1m)**: 87.17 dB SPL

2

Effective Piston Area (Sd):

76.950 in

0.0496 m

2

DC Resistance (Re): 3.51 ohm

Nominal Impedance: 4 ohm

Power Handling (continuous): 200 W

* 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 12WX-4