Machete MF-15R D4

15″ subwoofer · dual 4 Ω · 1,200 W RMS

Fs 36 HzQts 0.48Vas 2.32 ft³Xmax 0.59″

Recommended box

For a sedan, one sub, 1,200 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 volume1.31 ft³ (37 L)
Qtc0.80
Fc60 Hz
F3 (−3 dB, no cabin gain)57 Hz
Example box (outside)17 5/16″ × 17 5/16″ × 11 9/16″
Open sealed box in designer

Ported

Net volume4.24 ft³ (120 L)
Tuning (Fb)32 Hz
Portslot 3 9/16 × 16 11/16″, 30 1/16″ long
Port velocity at 1,200 W64 ft/s
F3 (−3 dB, no cabin gain)29 Hz
Example box (outside)31 1/2″ × 18 1/8″ × 20 11/16″
Open ported box in designer
203040506080100150200667278849096HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs36 Hz
Qts0.48
Qes0.522
Qms6
Vas2.32 ft³
Re (one coil)≈ 3.4 Ω
Sd≈ 124 in²
Xmax0.59″
EBP69 — sealed or ported calc.
Sensitivity, 1 W / 1 m89.7 dB calc.

General

Size15″
Voice coilsdual 4 Ω
RMS power1,200 W

Mounting dimensions

Ø≈ 15 3/16″cutout Ø14″mounting depth 7 3/16″magnet Ø≈ 9 1/16″
Cutout diameter14″
Mounting depth7 3/16″

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 15″ models