JBL W15GTi MkII

15″ subwoofer · dual 6 Ω · 800 W RMS

Fs 25.2 HzQts 0.48Vas 4.67 ft³Xmax 0.79″

Recommended box

For a sedan, one sub, 800 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 volume2.58 ft³ (73 L)
Qtc0.80
Fc42 Hz
F3 (−3 dB, no cabin gain)40 Hz
Example box (outside)16 15/16″ × 16 15/16″ × 21 3/16″
Open sealed box in designer

Ported

Net volume4.70 ft³ (133 L)
Tuning (Fb)29 Hz
Portslot 2 3/4 × 16 5/16″, 24 7/8″ long
Port velocity at 800 W64 ft/s
F3 (−3 dB, no cabin gain)27 Hz
Example box (outside)31 1/2″ × 17 11/16″ × 21 5/16″
Open ported box in designer
203040506080100150200667278849096HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs25.2 Hz
Qts0.48
Qes0.51
Qms7.2
Vas4.67 ft³
Re (one coil)5.8 Ω
Sd121 in²
Xmax0.79″
Vd95.3 in³ calc.
Mms260 g calc.
BL21.7 T·m calc.
EBP49 — suits sealed calc.
Sensitivity, 1 W / 1 m88.2 dB calc.

General

Size15″
Voice coilsdual 6 Ω
RMS power800 W

Mounting dimensions

Ø≈ 15 1/16″cutout Ø13 7/8″mounting depth 10 1/4″magnet Ø≈ 9″
Cutout diameter13 7/8″
Mounting depth10 1/4″

“≈” 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 JBL 15″ models