JL Audio 12W4-4 Specifications

Fs (free-air resonance):
Qts (total speaker "Q"):
Qes (electrical "Q"):
Qms (mechanical "Q"):
Vas (equivalent compliance):
Xmax (linear excursion one-way):
Effi ciency (1W/1m)*:
Sd (effective piston surface area):
Re (DC resistance):
Znom (nominal impedance):
Pt (continuous thermal power handling):
*Effi ciency (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"!
Frame Diameter (A):
Mounting Hole Diameter (B):
Mounting Depth (C):
Overall Depth (D):
Magnet Diameter (E):
Displacement:
Be sure to allow 0.75 inches (19mm) for pole vent clearance on this driver.
Normal Recommended Enclosures
Model
Volume (
Net Int.
1.25 ft
Sealed
35.4 l
Enclosure
Ported
2.25 ft
Enclosure
63.7 l
Port
(inside dia. X length)
W
Sealed Enclosure
•Enclosure dimensions listed are external dimensions which assume the use of 0.75 inch (19mm) thick material. If you are using
0.625 inch (16mm) thick material, subtract 0.25 inches (6.5mm) from each dimension. Do not use material with a thickness of
less than 0.625 inches (16mm).
•Enclosure volumes listed are NET internal volumes. Driver displacement, port displacement and brace displacement must be
added to obtain the fi nal gross volume. The dimensions listed have already taken this into account.
•When using two subwoofers in a common enclosure simply double the required volumes and use two of the recommended ports
(when needed). Likewise, when using three subwoofers in a common enclosure simply triple the required volume and number
of ports (when needed).
Subwoofer Specifi cations
Physical Dimensions
12.25
11.125
5.75
6.375
5.6875
0.07
12W4-4
) width X height X depth
3
20" x 13" x 12.25"
508mm x 330mm x 311mm
3
20" x 14" x 19.75"
508mm x 356mm x 502mm
4" X 13.5"
102mm X 343mm
H
D
12W4-4
23.2 Hz
0.396
0.416
7.898
5.14 145.6 liters
ft 3
0.400 10.2
in. mm
88.2 dB
82.5 in 2 0.0532 m 2
3.13
4
200 Watts
mm
in. 311.15
282.57 mm
in.
in. 146.05 mm
161.95
in. mm
mm
in. 144.46
1.979
ft 3
liters
Volume (
1.25 ft
35.4 l
2.00 ft
56.6 l
12W4-D4
23.1 Hz
4.77
ft
0.400
in.
87.8 dB
82.5
in
6.44
Dual 4
200 Watts
D
A
C
(single driver)
12W4-D4
) width X height X depth
Net Int.
3
20" x 13" x 12.25"
508mm x 330mm x 311mm
3
20" x 14" x 17.75"
508mm x 356mm x 451mm
4" X 15.2"
102mm X 386mm
W
D
Ported Enclosure
0.391
0.417
6.490
3 135.1 liters
10.2
mm
2 0.0532 2
m
(in series)
E B
H