Dynahertz H415 D2 Flex
15″ subwoofer · dual 2 Ω
Fs 35.2 HzQts 0.55Vas 1.63 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 volume | 1.48 ft³ (42 L) |
|---|---|
| Qtc | 0.80 |
| Fc | 51 Hz |
| F3 (−3 dB, no cabin gain) | 48 Hz |
| Example box (outside) | 17 5/16″ × 17 5/16″ × 12 3/4″ |
Ported
| Net volume | 4.45 ft³ (126 L) |
|---|---|
| Tuning (Fb) | 28 Hz |
| Port | slot 1 15/16 × 16 11/16″, 20 7/16″ long |
| Port velocity at 300 W | 59 ft/s |
| F3 (−3 dB, no cabin gain) | 25 Hz |
| Example box (outside) | 31 1/2″ × 18 1/8″ × 19 1/16″ |
Thiele/Small parameters
| Fs | 35.2 Hz |
|---|---|
| Qts | 0.55 |
| Qes | 0.6 |
| Qms | 6.93 |
| Vas | 1.63 ft³ |
| Re (one coil) | 2.25 Ω |
| Sd | 128.6 in² |
| Xmax | ≈ 0.39″ |
| Mms | 432 g calc. |
| BL | 18.9 T·m calc. |
| EBP | 59 — sealed or ported calc. |
| Sensitivity, 1 W / 1 m | 87.3 dB calc. |
General
| Size | 15″ |
|---|---|
| Voice coils | dual 2 Ω |
| RMS power | — |
Mounting dimensions
| 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
- Dynahertz H115 D2 15″ · dual 2 Ω
- Dynahertz H115 D4 15″ · dual 4 Ω
- Dynahertz H415 D2 Baja 15″ · dual 2 Ω