Machete M12 D4

12″ subwoofer · dual 4 Ω · 350 W RMS

Fs 34.6 HzQts 0.52Vas 1.34 ft³Xmax 0.55″

Recommended box

For a sedan, one sub, 350 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 volume0.99 ft³ (28 L)
Qtc0.80
Fc53 Hz
F3 (−3 dB, no cabin gain)50 Hz
Example box (outside)14 3/16″ × 14 3/16″ × 13 1/16″
Open sealed box in designer

Ported

Net volume2.93 ft³ (83 L)
Tuning (Fb)30 Hz
Portslot 1 15/16 × 14 5/16″, 24 3/16″ long
Port velocity at 350 W60 ft/s
F3 (−3 dB, no cabin gain)27 Hz
Example box (outside)31 1/2″ × 15 3/4″ × 15 5/8″
Open ported box in designer
203040506080100150200606672788490HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs34.6 Hz
Qts0.52
Qes0.569
Qms6
Vas1.34 ft³
Re (one coil)2.8 Ω
Sd≈ 76 in²
Xmax0.55″
EBP61 — sealed or ported calc.
Sensitivity, 1 W / 1 m86.4 dB calc.

General

Size12″
Voice coilsdual 4 Ω
RMS power350 W

Mounting dimensions

Ø≈ 12 3/16″cutout Ø11″mounting depth 6 1/16″magnet Ø≈ 7 3/16″
Cutout diameter11″
Mounting depth6 1/16″

Only Qts is published — Qms assumed to be 6 and Qes calculated (barely affects box design).

“≈” 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 Machete 12″ models