SoundQubed HDX412 D1

12″ subwoofer · dual 1 Ω · 2,000 W RMS

Fs 31 HzQts 0.31Vas 0.88 ft³Xmax 0.83″

Recommended box

For a sedan, one sub, 2,000 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 volume0.87 ft³ (24.5 L)
Qtc0.45
Fc44 Hz
F3 (−3 dB, no cabin gain)82 Hz
Example box (outside)14 9/16″ × 14 9/16″ × 11 1/8″
Open sealed box in designer

Ported

Net volume1.59 ft³ (45 L)
Tuning (Fb)26 Hz
Port2 round ports Ø2 1/2″, 23″ long
Port velocity at 2,000 W286 ft/s
F3 (−3 dB, no cabin gain)61 Hz
Example box (outside)25 1/8″ × 15 3/4″ × 11″
Open ported box in designer
2030405060801001502006066727884HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs31 Hz
Qts0.31
Qes0.344
Qms3.66
Vas0.88 ft³
Re (one coil)≈ 0.85 Ω
Sd82.6 in²
Xmax0.83″
Vd68.3 in³ calc.
Mms426 g calc.
BL14.3 T·m calc.
EBP90 — sealed or ported calc.
Sensitivity, 1 W / 1 m85.3 dB calc.

General

Size12″
Voice coilsdual 1 Ω
RMS power2,000 W

Mounting dimensions

Ø≈ 12 11/16″cutout Ø11 1/2″mounting depth 8 5/8″magnet Ø≈ 7 1/2″
Cutout diameter11 1/2″
Mounting depth8 5/8″

“≈” 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 SoundQubed 12″ models