Sealed Enclosure Specifications

Wall Thickness |
0.75 in / 19 mm |
Front Baffle Thickness |
1.0 in / 25 mm |
Volume (net int.) |
1.875 cu ft / 53.1 L |
External Width (W) |
16 in / 407 mm |
External Height (H) |
16 in / 407 mm |
External Depth (D) |
18.875 in / 479 mm |
F3 |
37.4 Hz |
Fc |
40.5 Hz |
Qtc |
0.77 |
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 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.
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Ported Enclosure Specifications

Wall Thickness |
0.75 in / 19 mm |
Front Baffle Thickness |
1.0 in / 25 mm |
Volume (net int.) |
2.375 cu ft / 67.3 L |
External Width (W) |
25.875 in / 657 mm |
External Height (H) |
16 in / 406 mm |
External Depth (D) |
17.25 in / 438 mm |
Internal Slot Port Width (SW) |
2.25 in / 57 mm |
Internal Slot Port Height (SH) |
14.5 in / 368 mm |
Internal Slot Port Length (SL) |
26.25 in / 667 mm |
Port Extension Length (EL) |
7.875 in / 200 mm |
Tuning Frequency (Fb) |
34.6 Hz |
F3 |
30.3 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 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.
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