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.