Dynahertz H115 D2

15″ subwoofer · dual 2 Ω

Fs 33.2 HzQts 0.64Vas 4.37 ft³

Recommended box

For a sedan, one sub, 300 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)
Qtc1.01
Fc53 Hz
F3 (−3 dB, no cabin gain)43 Hz
Example box (outside)31 1/2″ × 18 1/8″ × 12″
Open sealed box in designer

Ported

Net volume4.91 ft³ (139 L)
Tuning (Fb)38 Hz
Portslot 1 3/4 × 16 11/16″, 6 11/16″ long
Port velocity at 300 W66 ft/s
F3 (−3 dB, no cabin gain)33 Hz
Example box (outside)31 1/2″ × 18 1/8″ × 19 7/16″
Open ported box in designer
2030405060801001502007278849096102HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs33.2 Hz
Qts0.64
Qes0.7
Qms7.23
Vas4.37 ft³
Re (one coil)1.96 Ω
Sd127 in²
Xmax≈ 0.39″
Mms177 g calc.
BL10.2 T·m calc.
EBP47 — suits sealed calc.
Sensitivity, 1 W / 1 m90.1 dB calc.

General

Size15″
Voice coilsdual 2 Ω
RMS power—

Mounting dimensions

Ø≈ 15 3/16″cutout ≈ Ø14″mounting depth ≈ 7 1/16″magnet Ø≈ 9 1/16″
Cutout diameter≈ 14″
Mounting depth≈ 7 1/16″

Judging by its value, the published Re is for both coils in series — converted to per coil.

“≈” 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 Dynahertz 15″ models