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8W1-8
35.7 Hz
0.385
0.414
6.247
0.78 22.1
0.282 7.2
85.6 dB
30.7 0.0198
6.89
8
100 Watts
8W1-4
33.2 Hz
0.345
0.355
11.5
0.90 25.5
0.282 7.2
86.0 dB
30.7 0.0198
3.34
4
100Watts
Subwoofer Specifi cations
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):
Physical Dimensions
Frame Diameter (A):
Mounting Hole Diameter (B):
Mounting Depth (C):
Overall Depth (D):
Magnet Diameter (E):
Displacement:
Normal Recommended Enclosures (single driver)
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 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).
*Ef ciency (1W/1m) is not an accurate indicator of a subwoofers output capability and should not be used as a
comparison to other subwoofers to determine which one is louder!
Ported Enclosure
H
D
W
H
D
W
ft
3
liters
in.
mm
in
2
m
2
in.
mm
in.
mm
in.
mm
in.
mm
in.
mm
ft
3
liters
ft
3
in.
liters
mm
in
2
m
2
A
B
C
D
E
8.25
7
3.75
4.25
4.5625
0.025
209.55
177.8
95.25
107.95
115.88
0.707
Port
(inside dia. X length)
Model
Sealed
Enclosure
Ported
Enclosure
16 x 9 x 6.75
406mm x 229mm x 171mm
8W1-4
15 x 9 x 15.5
381mm x 229mm x 394mm
2.5 X 12.4
0.30 ft
3
64mm X 318mm
0.75 ft
3
width X height X depthVolume (Net Int.)
8.5 l
21.2 l
16 x 9 x 6.75
406mm x 229mm x 171mm
8W1-8
15 x 9 x 15.5
381mm x 229mm x 394mm
2.5 X 11.7
0.30 ft
3
64mm X 297mm
0.75 ft
3
width X height X depthVolume (Net Int.)
8.5 l
21.2 l
Be sure to allow 0.75 inches (19mm) for pole vent clearance on this driver.
Do NOT use different impedance speakers when using multiple subwoofers!
JL Audio recommends using subwoofers as part of a bi-ampli ed system using high quality satellite speakers like our Evolution line
of coaxial and component speakers. We do not recommend the use of passive crossover components (coils) on subwoofers. These
components may adversely affect the performance of a subwoofer.
When dealing with exceedingly long port lengths, we recommend the use of JL Audios Flex-Port System. The Flex-Port tubing is
exible, allowing it to t in otherwise tight locations. The Port mouths provide not only a convenient method of securing the port,
but a smooth, rounded edge for the port termination as well.
Wired directly to the ampli er:
A single 4 speaker will present a 4 load.
A single 8 speaker will present a 8 load.
With speakers wired in parallel:
Two 4 speakers will present a 2 load.
Two 8 speakers will present a 4 load.
With speakers wired in parallel:
Three 4 speakers will present a 1.3 load.
Three 8 speakers will present a 2.7 load.
2


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