JL Audio 8W7AE-3

8″ subwoofer · 3 Ω · 500 W RMS

Fs 35.2 HzQts 0.61Vas 0.61 ft³Xmax 0.75″

Recommended box

For a sedan, one sub, 500 W. It’s the same math as the designer’s step-by-step mode, where you can fit the box to your space, vehicle and amp and get plans, a cut sheet and DXF.

Sealed

Net volume0.88 ft³ (25 L)
Qtc0.80
Fc46 Hz
F3 (−3 dB, no cabin gain)43 Hz
Example box (outside)10 1/4″ × 10 1/4″ × 21 13/16″
Open sealed box in designer

Ported

Net volume1.48 ft³ (42 L)
Tuning (Fb)30 Hz
Portslot 1 9/16 × 14 5/16″, 41 1/4″ long
Port velocity at 500 W64 ft/s
F3 (−3 dB, no cabin gain)26 Hz
Example box (outside)31 1/2″ × 15 3/4″ × 10 1/2″
Open ported box in designer
203040506080100150200606672788490HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs35.2 Hz
Qts0.61
Qes0.654
Qms9.5
Vas0.61 ft³
Re2.78 Ω
Sd38 in²
Xmax0.75″
Vd28.4 in³ calc.
Mms100 g calc.
BL9.7 T·m calc.
EBP54 — sealed or ported calc.
Sensitivity, 1 W / 1 m82.7 dB calc.

General

Size8″
Voice coils3 Ω
RMS power500 W

Mounting dimensions

Ø8 1/2″cutout Ø6 15/16″mounting depth 6 13/16″magnet Ø5 13/16″
Cutout diameter6 15/16″
Mounting depth6 13/16″
Overall diameter8 1/2″
Magnet diameter5 13/16″

“≈” means the value isn’t in the spec sheet and a typical value for the size is used; “calc.” means it’s calculated from the published parameters. Check the manufacturer’s spec sheet before you build.

Data sources

Other JL Audio 8″ models