JL Audio 18W6, 15W6 Owners Manual

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):

15W6

16.3 Hz

0.312

0.325

7.817

10.88 308.1

0.420 10.7

ft
in.

3

87.9 dB

131.0 0.0845

in

2

10.88 Ω (in series)
Dual 6 Ω

400 Watts

liters

mm

m

9.00 254.9

0.500 12.7

2

182.6 0.1178

18W6

20.0 Hz

0.384

0.402

8.740

ft
in.

3

liters

mm

88.8 dB

2

in

m

11.04 Ω (in series)
Dual 6 Ω

500 Watts

2

*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”!

Physical Dimensions

15W6

Frame Diameter (A):

Mounting Hole Diameter (B):

Mounting Depth (C):

Overall Depth (D):

Magnet Diameter (E):

Displacement:

15.1875

13.875

7.25

7.875

6.5

0.135

in.
in.
in.
in.

in.
ft

385.76

352.42

184.15

200.02

165.1

3

3.816

mm
mm
mm
mm

mm

liters

18

16.5

8.125
9

8.25

0.21

Be sure to allow 0.75 inches (19mm) for pole vent clearance on this driver.

18W6
in.
in.

in.

in.
in.

3

ft

457.2

419.1

206.37

228.6

209.55

5.937

mm
mm
mm
mm

mm

liters

D

A

C

B

E

Normal Recommended Enclosures (single driver)

Model

3

Sealed

Enclosure

Ported

Enclosure

1.25 ft

35.4 l

2.25 ft

63.7 l

3

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).

15W6

width X height X depthVolume (Net Int.)

18” x 16” x 11.5”

457mm x 406mm x 292mm

22” x 17” x 15.5”

559mm x 432mm x 394mm

TWO 3” X 21.2”

TWO 76mm X 538mm

H

D

18W6

3

1.75 ft

49.6 l

483mm x 483mm x 318mm

Not Recommended

W

Ported Enclosure

width X height X depthVolume (Net Int.)

19” x 19” x 12.5”

H

D

With coils wired in parallel, a dual 6Ω speaker will present a 3Ω load.

With coils wired in series, a dual 6Ω speaker will present a 12Ω load.

With coils AND speakers wired in parallel:

2 dual 6Ω speakers (D6) will present a 1.5Ω load.

With the coils wired in series and the speakers wired in parallel:

2 dual 6Ω speakers (D6) will present a 6Ω load.

With coils AND speakers wired in parallel:

3 dual 6Ω speakers (D6) will present a 1Ω load.

With the coils wired in series and the speakers wired in parallel:

3 dual 6Ω speakers (D6) will present a 4Ω load.

•Do NOT use different impedance speakers when using multiple subwoofers!

•JL Audio recommends using subwoofers as part of a bi-amplifi 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 Audio’s Flex-Port System. The Flex-Port tubing is
fl exible, allowing it to fi 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.