ESX QE1224 (2x4 Ohm)

12″ subwoofer · dual 4 Ω · 800 W RMS

Fs 37 HzQts 0.44Vas 1.91 ft³Xmax 0.52″

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 volume0.81 ft³ (23 L)
Qtc0.80
Fc68 Hz
F3 (−3 dB, no cabin gain)64 Hz
Example box (outside)14 9/16″ × 14 9/16″ × 10 9/16″
Open sealed box in designer

Ported

Net volume2.72 ft³ (77 L)
Tuning (Fb)36 Hz
Portslot 2 3/4 × 14 5/16″, 24 3/4″ long
Port velocity at 800 W64 ft/s
F3 (−3 dB, no cabin gain)33 Hz
Example box (outside)31 1/2″ × 15 3/4″ × 15 7/16″
Open ported box in designer
203040506080100150200667278849096HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs37 Hz
Qts0.44
Qes0.5
Qms3.66
Vas1.91 ft³
Re (one coil)3.6 Ω
Sd79.1 in²
Xmax0.52″
Vd41.4 in³ calc.
Mms126 g calc.
BL14.5 T·m calc.
EBP74 — sealed or ported calc.
Sensitivity, 1 W / 1 m89.4 dB calc.

General

Size12″
Voice coilsdual 4 Ω
RMS power800 W

Mounting dimensions

Ø12 11/16″cutout Ø11 5/16″mounting depth 6 5/16″magnet Ø≈ 7 3/8″
Cutout diameter11 5/16″
Mounting depth6 5/16″
Overall diameter12 11/16″

“≈” 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 ESX 12″ models