Hertz SPL Show SX 250D (DVC 2+2 ohm)

10″ subwoofer · dual 2 Ω · 600 W RMS

Fs 51 HzQts 0.42Vas 0.39 ft³Xmax 0.55″

Recommended box

For a sedan, one sub, 600 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 volume0.49 ft³ (14 L)
Qtc0.56
Fc68 Hz
F3 (−3 dB, no cabin gain)94 Hz
Example box (outside)12 3/16″ × 12 3/16″ × 9 11/16″
Open sealed box in designer

Ported

Net volume1.02 ft³ (29 L)
Tuning (Fb)38 Hz
Port2 round ports Ø2 1/2″, 16 3/16″ long
Port velocity at 600 W159 ft/s
F3 (−3 dB, no cabin gain)35 Hz
Example box (outside)21 1/8″ × 15 3/4″ × 8 7/8″
Open ported box in designer
203040506080100150200606672788490HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs51 Hz
Qts0.42
Qes0.44
Qms8
Vas0.39 ft³
Re (one coil)2 Ω
Sd53.1 in²
Xmax0.55″
Vd29.3 in³ calc.
Mms147 g calc.
BL14.6 T·m calc.
EBP116 — suits ported calc.
Sensitivity, 1 W / 1 m87.2 dB calc.

General

Size10″
Voice coilsdual 2 Ω
RMS power600 W

Mounting dimensions

Ø10 9/16″cutout Ø9 1/8″mounting depth 6 5/16″magnet Ø≈ 5 15/16″
Cutout diameter9 1/8″
Mounting depth6 5/16″
Overall diameter10 9/16″

Cone area (Sd) calculated from Fs, Vas and Mms: 53.1 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