JL AUDIO - 12w3v3-2/4/8

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12W3v3 DRIVER SPECIFICATIONS

  12W3v3-2 12W3v3-4 12W3v3-8
Free Air Resonance (Fs): 27.97 Hz 26.72 Hz 28.28 Hz
Electrical "Q" (Qes): 0.534 0.472 0.553
Mechanical "Q" (Qms): 7.678 7.572 6.936
Total Speaker "Q" (Qts): 0.500 0.444 0.512
Equivalent Compliance (Vas): 2.806 cu. ft. / 79.47 liters 2.844 cu. ft. / 80.54 liters 2.729 cu. ft. / 77.29 liters
One-Way, Linear Excursion (Xmax)*: 0.510 in. / 13.0 mm 0.510 in. / 13.0 mm 0.510 in. / 13.0 mm
Reference Efficiency (no): 0.313% 0.313% 0.303%
Efficiency (1W/1m)**: 87.15 dB SPL 87.15 dB SPL 87.02 dB SPL
Effective Piston Area (Sd): 80.600 sq. in. / 0.0520 sq. m. 80.600 sq. in. / 0.0520 sq. m. 80.600 sq. in. / 0.0520 sq. m.
DC Resistance (Re): 1.658 ohm 3.563 ohm 7.310 ohm
Nominal Impedance (Znom): 2 ohm 4 ohm 8 ohm
Thermal Power Handling (Pt): 300W 300W 300W
Driver Displacement: 0.071 cu. ft. / 2.01 liters 0.071 cu. ft. / 2.01 liters 0.071 cu. ft. / 2.01 liters
Net Weight: 14.50 lbs. / 6.58 kg 14.50 lbs. / 6.58 kg 14.50 lbs. / 6.58 kg
* 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".
 
12W3v3 DRIVER PHYSICAL SPECIFICATIONS  



Mounting Image
Nominal
Diameter		 Overall
Diameter (A)		 Mounting Hole
Diameter (B)		 Bolt Hole
Circle (C)		 Magnet
Diameter (D)		 Mounting
Depth (E)
12.0 in. / 305 mm 12.5 in. / 318 mm 11.0625 in. / 281 mm 11.7 in. / 297 mm 5.5 in. / 140 mm 6.65 in. / 169 mm

12W3v3 ENCLOSURE SPECIFICATIONS
• The enclosure recommendations listed 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 are net internal volumes! Box volume displacement, port displacement and brace displacement must be added to obtain the final gross internal volume. All enclosure dimensions listed have already taken this into account.
• 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).
• We recommend the use of this speaker in a bi-amplified system using high-quality satellite speakers and amplifiers. We do not recommend the use of this subwoofer with a passive crossover (coil), as this type of device will adversely affect performance.
 

SAFETY NOTICE!
Prolonged exposure to sound pressure levels in excess of 100dB can cause permanent hearing loss. This highperformance 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.


Enclosure Image

 
Recommended Sealed Enclosures
Subwoofer Volume
(net int.) 		External Dimensions
(Width x Height x Depth)		 F3
(Hz)		 Fc
(Hz)		 Qtc
12W3v3-2 1.250 cu. ft. / 35.4 liters 23.0 in. x 14.0 in. x 10.0 in.
584 mm x 356 mm x 254 mm		 41.8 50.4 0.96
12W3v3-4 1.125 cu. ft. / 31.8 liters 23.0 in. x 14.0 in. x 9.25 in.
584 mm x 356 mm x 235 mm		 43.7 50.2 0.83
12W3v3-8 1.250 cu. ft. / 35.4 liters 23.0 in. x 14.0 in. x 10.0 in.
584 mm x 356 mm x 254 mm		 41.5 50.5 0.91

 
 
Front Baffle Thickness
0.75 in. / 19 mm
Wall Thickness
0.75 in. / 19 mm

Enclosure Image

 

Recommended Ported Enclosures
Subwoofer Volume
(net int.) 		External Dimensions
(Width x Height x Depth)		 Slot Port Internal Dimensions
(Slot Width x Slot Height x Slot Length)		 Port Extension
Length (EL)		 Tune to:
(Hz)		 F3
(Hz)
12W3v3-2 1.75 cu. ft. / 49.6 liters 29.0 in. x 14.0 in. x 12.625 in.
737 mm x 356 mm x 321 mm		 1.375 in x 12.5 in x 26.125 in.
35 mm x 318 mm x 664 mm		 13.5 in.
343 mm		 30.0 36.0
12W3v3-4 1.75 cu. ft. / 49.6 liters 29.0 in. x 14.0 in. x 12.625 in.
737 mm x 356 mm x 321 mm		 1.375 in x 12.5 in x 26.125 in.
35 mm x 318 mm x 664 mm		 13.5 in.
343 mm		 30.0 35.0
12W3v3-8 1.75 cu. ft. / 49.6 liters 29.0 in. x 14.0 in. x 12.625 in.
737 mm x 356 mm x 321 mm		 1.375 in x 12.5 in x 26.125 in.
35 mm x 318 mm x 664 mm		 13.5 in.
343 mm		 30.0 35.0

Front Baffle Thickness
0.75 in. / 19 mm
Wall Thickness
0.75 in. / 19 mm




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