Machete M15 v2 D4

15″ subwoofer · dual 4 Ω · 500 W RMS

Fs 29.1 HzQts 0.62Vas 2.90 ft³Xmax 0.55″

Recommended box

For a sedan, one sub, 500 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 volume2.83 ft³ (80 L)
Qtc0.88
Fc41 Hz
F3 (−3 dB, no cabin gain)36 Hz
Example box (outside)31 1/2″ × 17 11/16″ × 12″
Open sealed box in designer

Ported

Net volume4.80 ft³ (136 L)
Tuning (Fb)29 Hz
Portslot 2 3/8 × 16 5/16″, 20 3/8″ long
Port velocity at 500 W61 ft/s
F3 (−3 dB, no cabin gain)25 Hz
Example box (outside)31 1/2″ × 17 11/16″ × 20 7/8″
Open ported box in designer
203040506080100150200667278849096HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs29.1 Hz
Qts0.62
Qes0.691
Qms6
Vas2.90 ft³
Re (one coil)3.6 Ω
Sd≈ 124 in²
Xmax0.55″
EBP42 — suits sealed calc.
Sensitivity, 1 W / 1 m86.7 dB calc.

General

Size15″
Voice coilsdual 4 Ω
RMS power500 W

Mounting dimensions

Ø≈ 14 13/16″cutout Ø13 5/8″mounting depth 6 15/16″magnet Ø≈ 8 7/8″
Cutout diameter13 5/8″
Mounting depth6 15/16″

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