Hertz Mille Pro MPS 250 S2 (shallow, SVC 2 ohm)

10″ subwoofer · 2 Ω · 500 W RMS

Fs 28 HzQts 0.41Vas 0.87 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)
Qtc0.67
Fc45 Hz
F3 (−3 dB, no cabin gain)50 Hz
Example box (outside)12 3/16″ × 12 3/16″ × 10 1/4″
Open sealed box in designer

Ported

Net volume1.09 ft³ (31 L)
Tuning (Fb)29 Hz
Port2 round ports Ø2 1/2″, 27 1/8″ long
Port velocity at 500 W118 ft/s
F3 (−3 dB, no cabin gain)27 Hz
Example box (outside)31 1/2″ × 15 3/4″ × 6 7/8″
Open ported box in designer
2030405060801001502006066727884HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs28 Hz
Qts0.41
Qes0.45
Qms5.3
Vas0.87 ft³
Re2.2 Ω
Sd56.7 in²
Xmax0.66″
Vd37.5 in³ calc.
Mms250 g calc.
BL14.7 T·m calc.
EBP62 — sealed or ported calc.
Sensitivity, 1 W / 1 m82.8 dB calc.

General

Size10″
Voice coils2 Ω
RMS power500 W

Mounting dimensions

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

Cone area (Sd) calculated from Fs, Vas and Mms: 56.7 in².

“≈” 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