Hertz SPL Show SS 15 D2 (DVC 2+2 ohm)

15″ subwoofer · dual 2 Ω · 1,200 W RMS

Fs 31 HzQts 0.61Vas 2.43 ft³Xmax 0.61″

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 volume2.90 ft³ (82 L)
Qtc0.82
Fc42 Hz
F3 (−3 dB, no cabin gain)39 Hz
Example box (outside)31 1/2″ × 17 11/16″ × 12 1/4″
Open sealed box in designer

Ported

Net volume4.91 ft³ (139 L)
Tuning (Fb)29 Hz
Portslot 3 3/4 × 16 5/16″, 33″ long
Port velocity at 1,200 W63 ft/s
F3 (−3 dB, no cabin gain)25 Hz
Example box (outside)31 1/2″ × 17 11/16″ × 24″
Open ported box in designer
203040506080100150200667278849096HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs31 Hz
Qts0.61
Qes0.66
Qms7.4
Vas2.43 ft³
Re (one coil)1.92 Ω
Sd127 in²
Xmax0.61″
Vd77 in³ calc.
Mms364 g calc.
BL14.4 T·m calc.
EBP47 — suits sealed calc.
Sensitivity, 1 W / 1 m86.9 dB calc.

General

Size15″
Voice coilsdual 2 Ω
RMS power1,200 W

Mounting dimensions

Ø15 3/8″cutout Ø13 7/8″mounting depth 7 3/8″magnet Ø≈ 9 1/16″
Cutout diameter13 7/8″
Mounting depth7 3/8″
Overall diameter15 3/8″

“≈” 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 15″ models