JL Audio Subwoofer Specifications, 8W3-D2, 8W3-D4, 8W3-D6, 10W3-D2, 10W3-D4, 10W3-D6

SUBWOOFER SPECIFICATIONS

SUBWOOFER:	8W3-D2	8W3-D4	8W3-D6	10W3-D2	10W3-D4	10W3-D6
Free Air Resonance (Fs):	34.3 Hz	35.3Hz	35.1 Hz	28.8 Hz	29.7 Hz	30.8 Hz
Electrical “Q” (Qes):	0.428	0.516	0.508	0.503	0.546	0.563
Mechanical “Q” (Qms):	6.850	6.850	6.850	8.260	8.260	8.260
Total Speaker “Q” (Qts):	0.403	0.480	0.473	0.474	0.512	0.527
Equiv. Compliance (Vas):	0.79 ft3	0.79 ft3	0.79 ft3	1.66 ft3	1.66 ft3	1.66 ft3
	22.4 litres	22.4 litres	22.4 litres	38.6 litres	38.6 litres	38.6 litres
One-way, Linear Excursion:	0.39 in	0.39 in	0.42 in	0.549 in	0.579 in	0.513 in
(Xmax)*	9.9 mm	9.9 mm	10.7 mm	13.9 mm	14.7 mm	13.0 mm
Efficiency (1W/1m)**:	85.0 dB	84.6 dB	84.6 dB	85.3 dB	85.3 dB	85.6 dB
Effective Piston Area (Sd):	33.2 in2	33.2 in2	33.2 in2	53.5 in2	53.5 in2	53.5 in2
	0.0214 m2	0.0214 m2	0.0214 m2	0.0345 m2	0.0345 m2	0.0345 m2
DC Resistance (Re)***:	3.39Ω	6.56Ω	10.78Ω	3.30Ω	6.82Ω	10.98Ω
Nominal Impedance:	Dual 2Ω	Dual 4Ω	Dual 6Ω	Dual 2Ω	Dual 4Ω	Dual 6Ω
Power Handling (continuous):	125W	125W	125W	250W	250W	250W
Mounting Depth:	4.25 in	4.25 in	4.25 in	5.8125 in	5.8125 in	5.8125 in
	108 mm	108 mm	108 mm	148 mm	148 mm	148 mm
Mounting Hole Diameter:	7.0 in	7.0 in	7.0 in	9.125 in	9.125 in	9.125 in
	178 mm	178 mm	178 mm	232 mm	232 mm	232 mm
Driver Displacement:	0.035 ft3	0.035 ft3	0.035 ft3	0.050 ft3	0.050 ft3	0.050 ft3
	1.0 litres	1.0 litres	1.0 litres	1.4 litres	1.4 litres	1.4 litres

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

**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”.

***Re (DC resistance) is measured with the voice coils in series, for parallel-wired specification divide Re by 4. All other specifications remain the same.

W 3 VO I C E C O I L S I N S E R I E S :				W 3 VO I C E C O I L S I N PA R A L L E L :
		W3-D6:	12.0Ω			W3-D6: 3.0Ω
	AMPLIFIER W3-D4:		8.0Ω		AMPLIFIER W3-D4: 2.0Ω

RECOMMENDED ENCLOSURES

SUBWOOFER	SEALED ENCLOSURE				PORTED ENCLOSURE
	Volume		External Dimensions	Volume	External Dimensions	Port
	(net int.)	(Width x Height x Depth)		(net int.)	(Width x Height x Depth)	(Inside Dia. x Length)
8W3-D2	0.330 ft3		16" x 9" x 7.25"	0.75 ft3	15" x 10" x 13.75"	2.5" x 12.7"
	9.35 litres	406mm x 229mm x 184mm		21.2 litres	381mm x 254mm x 349mm	64mm x 323mm
8W3-D4	0.375 ft3		16" x 9" x 8"	0.75 ft3	15" x 10" x 13.75"	2.5" x 11.9"
	10.6 litres	406mm x 229mm x 203mm		21.2 litres	381mm x 254mm x 349mm	64mm x 302mm
8W3-D6	0.375 ft3		16" x 9" x 8"	0.75 ft3	15" x 10" x 13.75"	2.5" x 12.1"
	10.6 litres	406mm x 229mm x 203mm		21.2 litres	381mm x 254mm x 349mm	64mm x 307mm
10W3-D2	0.625 ft3		18" x 11" x 9"	1.00 ft3	16" x 11" x 15.5"	3.0" x 14.5"
	17.7 litres	457mm x 279mm x 229mm		28.3 litres	406mm x 279mm x 394mm	76mm x 368mm
10W3-D4	0.625 ft3		18" x 11" x 9"	1.125 ft3	16" x 11" x 17"	3.0" x 12.8"
	17.7 litres	457mm x 279mm x 229mm		31.9 litres	406mm x 279mm x 432mm	76mm x 325mm
10W3-D6	0.75 ft3		18" x 11" x 10.5"	1.25 ft3	16" x 11" x 18.5"	3.0" x 11.3"
	21.2 litres	457mm x 279mm x 267mm		35.4 litres	406mm x 279mm x 470mm	76mm x 287mm
C A U T I O N

Prolonged exposure to sound pressure levels in excess of 100dB can cause permanent hearing loss. This high-performance speaker can exceed this level. Please exercise restraint in its operation in order to preserve your ability to enjoy its fidelity.

When installing a subwoofer in your vehicle, it is extremely important to secure the enclosure firmly. We recommend bolting the enclosure through the metal of the floorpan or the frame of the vehicle with large diameter washers for reinforcement. If an enclosure is not firmly attached, it can become a projectile in a collision. This is particularly important in a hatchback, station wagon, sports utility vehicle, or van.

W3-D2: 4.0Ω	W3-D2: 1.0Ω
W3-D6: 6.0Ω	W3-D6: 1.5Ω
AMPLIFIER W3-D4: 4.0Ω	AMPLIFIER W3-D4: 1.0Ω
W3-D2: 2.0Ω	W3-D2: 0.5Ω
W3-D6: 4.0Ω	W3-D6: 1.0Ω
AMPLIFIER W3-D4: 2.7Ω	AMPLIFIER W3-D4: 0.7Ω
W3-D2: 1.3Ω	W3-D2: 0.3Ω

•The enclosure recommendations listed above are external dimensions which assume the use of 3/4" (19mm) thick material. If you are using 5/8" (16mm) thick material, subtract 1/4" (6.5mm) from each dimension. Do not use any material with a thickness of less than 5/8" (16mm) as this may compromise the rigidity of the enclosure.

•All enclosure volumes listed above are net internal volumes! Driver displacement, port

displacement and brace displacement must be added to obtain the final gross internal volume. All enclosure dimensions above have already taken this into acount.

•When using two subwoofers in a common enclosure simply double the required volume and, in the case of a ported enclosure, use two times the recommended port(s). Likewise, when using three subwoofers in a common enclosure simply triple the required volume

and, in the case of a ported enclosure, use three times the recommended port(s).

•We recommend the use of this speaker in a bi-amplified system using high-quality satellite speakers and a high-quality amplifier. We do not recommend the use of this subwoofer with a passive crossover (coil), as this type of device will adversely affect performance.

All specifications are subject to change without notice.

2 JL AUDIO 8W3/10W3 JL AUDIO 8W3/10W3 3