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12W7AE Subwoofer:
Driver & Enclosure Specifications
Overall
Depth
11.25 in.
(286 mm)
Mounting
Depth
9.5 in.
(241 mm)
Overall
Diameter
12.5 in.
(318 mm)
Bolt Hole
Circle
11.27 in.
(286 mm)
12 Holes
Magnet
Diameter
7.5 in.
(191 mm)
Mounting
Hole
Diameter
10.5 in.
(267 mm)
External Width
15.0 in.
(381 mm)
External Height
15.0 in.
(381 mm)
External Depth
16.125 in.
(410 mm)
Slot Height
13.5 in.
(343 mm)
External Width
22.75 in.
(578 mm)
External Height
15.0 in.
(381 mm)
External Depth
15.875 in.
(403 mm)
Slot Width
1.875 in.
(48 mm)
Slot Port Depth
24.75 in.
(629 mm)
Slot Width
1.875 in.
(48 mm)
Extension Length
7.9375 in.
(202 mm)
Grille Clearance: 2.6 in. (66 mm) from the bottom of the
mounting flange to the lowest inside surface of the grille.
Displacement: 0.14 cu. ft. (4.0 ltrs)
Net Weight: 45 lbs. (20.4 kg)
Mounting Hardware:
Twelve #10 x 1.75
long clear, zinc-plated
steel Phillips pan-head sheet metal screws (included) or twelve
#10-32 long steel Phillips pan-head machine screws with #10-32
T-Nuts, each at least 1/2-inch (12.5 mm) longer than the thickness
of the mounting baffle (not included).
Unpacking/Mounting: Please refer to the “How to: Mount a W7AE
Subwoofer on pages 4 & 5 for detailed, step-by-step instructions.
PORTED ENCLOSURE:
Recommended Net Volume: 1.75 cu. ft. (51.54 ltrs.)
Recommended Port Tuning: 36.7 Hz
Port Type: “Slot” ports are recommended. See information above.
The port recommendations listed above are derived through actual tests and
measurements (not computer simulations).
Front Baffle Thickness: 1 in. (25 mm)
Wall Thickness: 0.75 in. (19 mm)
Net volumes given below 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 dimensions given for the enclosure examples below take all applicable
displacements into consideration.
SEALED ENCLOSURE:
Recommended Net Volume: 1.375 cu. ft. (38.94 ltrs.)
Fc: 44.7 Hz F3: 40.4 Hz Qtc: 0.791
Front Baffle Thickness: 1 in. (25 mm)
Wall Thickness: 0.75 in. (19 mm)
SAFETY NOTICE!
It is absolutely essential that the completed subwoofer enclosure
is mounted firmly to the vehicle with heavy steel bolts (1/2 inch
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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