JL Audio 12TW1-2 operation manual

OWNER’S MANUAL

12TW1-2 / 12TW1-4 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.

JL AUDIO 12TW1-2 / 12TW1-4

U.S. PATENTS: #6,095, 280 #8,374,379 #5,734,132 | Other U.S . & Foreign patents pend ing.

B

D

12TW1 SUBWOOFER PHYSICAL

SPECIFICATIONS

Nominal Diameter:

Overall Diameter (A):

Mounting Hole Diameter (B):

Bolt Hole Circle (C):

Magnet Diameter (D):

Mounting Depth (E):

12.0 in.
300 mm

12.375 in.
314 mm

11.0625 in
281 mm

11.7 in.
297 mm

5.71 in.
145 mm

4.62 in.
117 mm

C

E

A

SUBWOOFER 12TW1-2 12TW1-4

Free Air Resonance (Fs): 35.06 Hz 32.35 Hz

Electrical “Q” (Qes): 0.610 0.555

Mechanical “Q” (Qms): 10.662 11.066

Total Speaker “Q” (Qts): 0.577 0.529

3

Equivalent Compliance (Vas):

One-way, Linear Excursion (Xmax)*:

Efficiency (1W/1m)**: 85.07 dB SPL 85.15 dB SPL

Effective Piston Area (Sd):

1.008 ft

28.54 litres

0.40 in

10 mm

67.608 in

0.0436 m

2

2

F

1.189 ft

33.67 litres

0.40 in

10 mm

67.608 in

0.0436 m

3

2

2

Frontal Grille Protrusion (F):

0.87 in
22 mm

DC Resistance (Re): 2.430 ohm 3.514 ohm

Nominal Impedance: 2 ohm 4 ohm

Net Weight:

Driver Displacement:

2 JL AUDIO 12 T W1- 2 / 12 T W1- 4

16.5 lbs

7.5 kg

0.072 ft

2.04 litres

Power Handling (continuous): 300 W 300 W

3

* Xmax specifications are derived via one-way voice coil overhang method with no correction factors applied.

** Efficie ncy (1W/1m) is not an accurate ind icator of a subwoofer ’s output capability and

should not be used as a comparison to other subwoofers to determine which one is “louder”!

All specifications are subject to change without notice.