Earthquake HoLeeS-12

12″ subwoofer · dual 1 Ω

Fs 26.4 HzQts 0.28Vas 1.17 ft³

Recommended box

For a sedan, one sub, 300 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 volume1.18 ft³ (33.5 L)
Qtc0.39
Fc37 Hz
F3 (−3 dB, no cabin gain)83 Hz
Example box (outside)14 9/16″ × 14 9/16″ × 14 5/16″
Open sealed box in designer

Ported

Net volume1.59 ft³ (45 L)
Tuning (Fb)25 Hz
Portround port Ø2 1/2″, 11 9/16″ long
Port velocity at 300 W220 ft/s
F3 (−3 dB, no cabin gain)63 Hz
Example box (outside)17 3/4″ × 15 3/4″ × 14 3/8″
Open ported box in designer
2030405060801001502006066727884HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs26.4 Hz
Qts0.28
Qes0.293
Qms4.92
Vas1.17 ft³
Re (one coil)1 Ω
Sd82.2 in²
Xmax≈ 0.39″
Mms436 g calc.
BL15.7 T·m calc.
EBP90 — sealed or ported calc.
Sensitivity, 1 W / 1 m85.2 dB calc.

General

Size12″
Voice coilsdual 1 Ω
RMS power—

Mounting dimensions

Ø≈ 12 11/16″cutout Ø11 1/2″mounting depth 11 7/8″magnet Ø≈ 7 1/2″
Cutout diameter11 1/2″
Mounting depth11 7/8″

“≈” 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 12″ models