JL Audio 18W6 dimensions Subwoofer Specifications, Physical Dimensions

Subwoofer Specifications

	8W6		10W6			12W6
Fs (free-air resonance):	32.5 Hz		23.2 Hz			20.9 Hz
Qts (total speaker “Q”):	0.466		0.432			0.433
Qes (electrical “Q”):	0.511		0.463			0.462
Qms (mechanical “Q”):	5.500		6.567			6.897
Vas (equivalent compliance):	0.79 ft3	22.4 liters	2.30 ft3	65.1 liters	5.73	ft3	162.3 liters
Xmax (linear excursion one-way):	0.388 in.	9.9 mm	0.469 in.	11.9mm	0.438	in.	11.1 mm
Efficiency (1W/1m)*:	83.6 dB		84.2 dB			86.9 dB
Sd (effective piston surface area):	30.7 in2	0.0198 m2	53.6 in2	0.0346 m2	82.5	in2	0.0532 m2
Re (DC resistance):	10.6 Ω	(in series)	10.8 Ω	(in series)	10.8	Ω	(in series)
Znom (nominal impedance):	Dual 6 Ω		Dual 6 Ω		Dual 6 Ω
Pt (continuous thermal power handling):	200 Watts		300 Watts		300 Watts

*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”!

Physical Dimensions

8W6

10W6

12W6

Frame Diameter (A):

8.25

in.

209.55 mm

10.125 in.

257.17 mm

12.25

in.

311.15 mm

Mounting Hole Diameter (B):

7

in.

177.8 mm

9.125

in.

231.77 mm

11.0625in.

280.98 mm

Mounting Depth (C):

4.25

in.

107.95 mm

4.875

in.

123.82 mm

5.625

in.

142.87 mm

A

Overall Depth (D):

4.6875

in.

119.06 mm

5.5

in.

139.7

mm

6.5

in.

165.1

mm

Magnet Diameter (E):

4.875

in.

123.82 mm

6.5

in.

165.1

mm

6.5

in.

165.1

mm

Displacement:

0.035

ft3

0.989 liters

0.06

ft3

1.696

liters

0.085

ft3

2.403

liters

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

D

E B

C

Normal Recommended Enclosures (single driver)

Model		8W6		10W6		12W6
	Volume (Net Int.)	width X height X depth	Volume (Net Int.)	width X height X depth	Volume (Net Int.)	width X height X depth
Sealed	0.375 ft3	16” x 9” x 8”	0.625 ft3	18” x 11” x 9”	1.25 ft3	18” x 13” x 13.75”
Enclosure	10.6 l	406mm x 229mm x 203mm	17.7 l	457mm x 279mm x 229mm	35.4 l	457mm x 330mm x 349mm
Ported	0.625 ft3	15” x 10” x 12.25”	1.00 ft3	17” x 12” x 13.75”	2.25 ft3	20” x 14” x 17.75”
Enclosure	17.7 l	381mm x 254mm x 311mm	28.3 l	432mm x 305mm x 349mm	63.7 l	508mm x 356mm x 451mm
	Port	2.5” X 15.4”		3” X 18.6”		TWO 2.5” X 13.6”
(inside dia. X length)		64mm X 391mm		76mm X 472mm		TWO 64mm X 345mm

H

H

W	D	W	D
Sealed Enclosure		Ported 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 final 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).