Hertz Mille Pro MPS 250 S4 (shallow, SVC 4 ohm)

10″ subwoofer · 4 Ω · 500 W RMS

Fs 29 HzQts 0.48Vas 0.75 ft³Xmax 0.66″

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 volume0.53 ft³ (15 L)
Qtc0.74
Fc45 Hz
F3 (−3 dB, no cabin gain)45 Hz
Example box (outside)12 3/16″ × 12 3/16″ × 10 1/4″
Open sealed box in designer

Ported

Net volume1.34 ft³ (38 L)
Tuning (Fb)27 Hz
Port2 round ports Ø2 1/2″, 25 3/8″ long
Port velocity at 500 W126 ft/s
F3 (−3 dB, no cabin gain)24 Hz
Example box (outside)31 1/2″ × 15 3/4″ × 7 13/16″
Open ported box in designer
2030405060801001502006066727884HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs29 Hz
Qts0.48
Qes0.52
Qms5.6
Vas0.75 ft³
Re3.3 Ω
Sd57.1 in²
Xmax0.66″
Vd37.8 in³ calc.
Mms273 g calc.
BL17.8 T·m calc.
EBP56 — sealed or ported calc.
Sensitivity, 1 W / 1 m82 dB calc.

General

Size10″
Voice coils4 Ω
RMS power500 W

Mounting dimensions

Ø10 13/16″cutout Ø9 1/8″mounting depth 3 5/16″magnet Ø5 1/4″
Cutout diameter9 1/8″
Mounting depth3 5/16″
Overall diameter10 13/16″
Magnet diameter5 1/4″

“≈” 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 Hertz 10″ models