Earthquake HoLeeS-15

15″ subwoofer · dual 1 Ω · 7,000 W RMS

Fs 24.2 HzQts 0.39Vas 3.77 ft³Xmax 2.00″

Recommended box

For a sedan, one sub, 7,000 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 volume2.22 ft³ (63 L)
Qtc0.63
Fc40 Hz
F3 (−3 dB, no cabin gain)47 Hz
Example box (outside)17 11/16″ × 17 11/16″ × 17 1/16″
Open sealed box in designer

Ported

Net volume3.67 ft³ (104 L)
Tuning (Fb)27 Hz
Portslot 4 1/8 × 17 1/16″, 63 9/16″ long
Port velocity at 7,000 W106 ft/s
F3 (−3 dB, no cabin gain)26 Hz
Example box (outside)31 1/2″ × 18 1/2″ × 24 1/4″
Open ported box in designer
203040506080100150200606672788490HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs24.2 Hz
Qts0.39
Qes0.412
Qms6.17
Vas3.77 ft³
Re (one coil)1 Ω
Sd128.6 in²
Xmax2.00″
Vd257.2 in³ calc.
Mms396 g calc.
BL12.1 T·m calc.
EBP59 — sealed or ported calc.
Sensitivity, 1 W / 1 m87.6 dB calc.

General

Size15″
Voice coilsdual 1 Ω
RMS power7,000 W

Mounting dimensions

Ø≈ 15 11/16″cutout Ø14 1/2″mounting depth 14 1/2″magnet Ø≈ 9 7/16″
Cutout diameter14 1/2″
Mounting depth14 1/2″

“≈” 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 Earthquake 15″ models