13W7
DRIVER SPECIFICATIONS
13W7-D1.5
Free
Air Resonance (Fs):
23.5 Hz
Electrical “Q” (Qes):
0.476
Mechanical “Q” (Qms):
7.517
Total Speaker “Q”
(Qts):
0.448
Equivalent Compliance
(Vas):
3.68 cu. ft. / 104.3 liters
One-Way, Linear
Excursion (Xmax)*:
1.25 in. / 32 mm
Reference Efficiency
(no):
0.269%
Efficiency (1W/1m)**:
86.3 dB SPL
Effective Piston Area
(Sd):
107.35 sq. in. / 0.0693 sq. m
DC Resistance (Re):
2.41 ohm***
Nominal Impedance
(Znom):
Dual 1.5 ohm
Thermal Power Handling
(Pt):
1500W
Driver Displacement:
0.21 cu. ft. / 5.9 liters
Net Weight:
52 lbs. / 23.6 kg
* Xmax specifications are derived via one-way
voice coil overhang method with no correction factors applied.
** For parallel-wired voice coils, divide "Re" by 4. All other
specifications remain the same.
*** 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.
Click here to download the owner's manual (PDF).
13W7 DRIVER
PHYSICAL SPECIFICATIONS
Nominal
Diameter
Overall
Diameter (A)
Mounting Hole
Diameter (B)
Bolt Hole
Circle (C)
Magnet
Diameter (D)
Mounting
Depth (E)
13.5 in. / 345 mm
14 in. / 356 mm
11.9 in. / 302 mm
12.7 in. / 323 mm
8.38 in. / 213 mm
10.5 in. / 267 mm
W7: Technology
Overview
W7 Subwoofer Drivers
The W7 embodies JL Audio's commitment to pushing the envelope of
speaker technology, with six patented technologies and a completely
unique set of component parts. Each W7 model has been meticulously
engineered to reproduce sub-bass with extreme fidelity at any volume
level.
At first glance, you may only see a rather massive woofer, but as you
begin to analyze the technology and the performance envelope of a W7,
you will realize that they are much more than just another big SPL
speaker. For us, designing a pure SPL speaker, with no regard to
sound
quality, would have presented a far lesser challenge than the one we
chose to undertake with the W7 project. The goal was to design
subwoofer drivers that deliver immense output with an extremely high
level of fidelity.
It wouldn't be enough for the speaker to sound great or be loud, it
had
to do both. This goal required us to develop a deeper understanding
of
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