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JL Audio 8W7-3 8-inch (20 cm) Subwoofer

JL Audio 8W7-3 8-inch (20 cm) Subwoofer l Unitedcarshops.nl

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  • JL Audio 8W7-3 8-inch (20 cm) Subwoofer l Unitedcarshops.nl
  • JL Audio 8W7-3 8-inch (20 cm) Subwoofer l Unitedcarshops.nl
  • JL Audio 8W7-3 8-inch (20 cm) Subwoofer l Unitedcarshops.nl

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€ 649,00

JL Audio 8W7-3 8-inch Subwoofer Driver (500 W, 3 Ω)

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8W7-3

W7 8-inch Subwoofer Driver (500 W, 3 Ω)

This subwoofer driver has been called the "best damn 8-inch subwoofer ever made" for its remarkable performance capabilities and design attributes. An impressive linear excursion envelope that exceeds 0.75 in. (19 mm) one-way allows it to deliver impact well beyond the range of other 8-inch subwoofer drivers.

The 8W7AE is best used with amplifier power in the 200W - 500W range and is optimized to operate in a 0.875 cu. ft. (24.8 l) sealed enclosure, or a 1.0 cu. ft. (28.3 l) ported enclosure. Detailed enclosure recommendations can be found in the "Specifications" tab.

General Specifications

Table_Image
Continuous Power Handling (RMS) 500 W
Recommended Amplifier Power (RMS) 200- 500 W
Nominal Impedance (Znom) 3 Ω

Physical Specifications

Table_Image
Nominal Diameter 8.0 in / 200 mm
Overall Diameter (A) 8.5 in / 216 mm
Mounting Hole Diameter (B) 6.94 in / 176 mm
Bolt Hole Circle Diameter (C) 7.39 in / 188 mm
Motor Outer Diameter (D) 5.79 in / 147 mm
Mounting Depth (E) 6.83 in / 173 mm
Driver Displacement 0.06 cu ft / 1.7 L
Net Weight 17 lb / 7.8 kg

Parameters

Free Air Resonance (Fs) 35.2 Hz
Electrical “Q” (Qes) 0.654
Mechanical “Q” (Qms) 9.5
Total Speaker “Q” (Qts) 0.612
Equivalent Compliance (Vas) 0.61 cu ft / 17.4 L
One-Way Linear Excursion (Xmax)* 0.75 in / 19 mm
Reference Efficiency (no) 0.11%
Efficiency (1 W / 1 m)** 82.7 dB SPL
Effective Piston Area (Sd) 38 sq in / 0.0245 sq m
DC Resistance (Re) 2.78 Ω

* Xmax specifications are derived via one-way voice coil overhang method with no correction factors applied.
** Efficiency (1 W / 1 m) 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”.

Sealed Enclosure Specifications

Table_Image
Wall Thickness 0.75 in / 19 mm
Front Baffle Thickness 0.75 in / 19 mm
Volume (net int.) 0.875 cu ft / 24.8 L
External Width (W) 14 in / 394 mm
External Height (H) 10 in / 254 mm
External Depth (D) 16.75 in / 464 mm
F3 41.3 Hz
Fc 46 Hz
Qtc 0.797

Enclosure Notes
Net volumes given above do not include the air volume displaced by the speaker (Driver Displacement). This value must be added to the net volume along with the displacement of any braces and/or ports (if applicable) to arrive at a gross internal volume. Air inside a port is not part of the effective net volume. Calculate ports as solid, not hollow objects.

* The W7’s employ a pole vent to remove heat and pressure from the inside of the speaker.This vent is located around the JL Audio badge at the rear of the speaker. A minimum distance of 0.75 in (19 mm) is required between the back of the speaker and any wall of the enclosure to allow proper operation of the pole vent.

The dimensions given for the enclosure examples above take all applicable displacements into consideration

Safety Notice
It is absolutely essential that the completed subwoofer enclosure is mounted firmly to the vehicle with heavy steel bolts (0.5 in diameter) and large steel washers on both sides of the bolts. This will reduce the likelihood of occupant injury in the event of a collision or sudden deceleration.

Ported Enclosure Specifications

Table_Image
Wall Thickness 0.75 in / 19 mm
Front Baffle Thickness 0.75 in / 19 mm
Volume (net int.) 1.00 cu ft / 28.3 L
External Width (W) 25.5 in / 648 mm
External Height (H) 10 in / 254 mm
External Depth (D) 12 in / 305 mm
Internal Slot Port Width (SW)  1.5 in / 38 mm
Internal Slot Port Height (SH) 8.5 in / 216 mm
Internal Slot Port Length (SL) 26 in / 572 mm
Port Extension Length (EL) 13.25 in / 337 mm
Tuning Frequency (Fb) 34.33 Hz
F3 28.02 Hz

Enclosure Notes
Net volumes given above do not include the air volume displaced by the speaker (Driver Displacement). This value must be added to the net volume along with the displacement of any braces and/or ports (if applicable) to arrive at a gross internal volume. Air inside a port is not part of the effective net volume. Calculate ports as solid, not hollow objects.

* The W7’s employ a pole vent to remove heat and pressure from the inside of the speaker.This vent is located around the JL Audio badge at the rear of the speaker. A minimum distance of 0.75 in (19 mm) is required between the back of the speaker and any wall of the enclosure to allow proper operation of the pole vent.

The dimensions given for the enclosure examples above take all applicable displacements into consideration

Safety Notice
It is absolutely essential that the completed subwoofer enclosure is mounted firmly to the vehicle with heavy steel bolts (0.5 in diameter) and large steel washers on both sides of the bolts. This will reduce the likelihood of occupant injury in the event of a collision or sudden deceleration.