Dynahertz H415 D2 Baja
15″ subwoofer · dual 2 Ω
Fs 31.4 HzQts 0.55Vas 2.45 ft³
The published specs don’t add up:
- The spec sheet's Qts 0.49 doesn't match its Qes and Qms (they give 0.55).
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 | 2.22 ft³ (63 L) |
|---|---|
| Qtc | 0.80 |
| Fc | 46 Hz |
| F3 (−3 dB, no cabin gain) | 43 Hz |
| Example box (outside) | 31 1/2″ × 18 1/8″ × 9 11/16″ |
Ported
| Net volume | 4.80 ft³ (136 L) |
|---|---|
| Tuning (Fb) | 29 Hz |
| Port | slot 1 3/4 × 16 11/16″, 15 1/16″ long |
| Port velocity at 300 W | 64 ft/s |
| F3 (−3 dB, no cabin gain) | 25 Hz |
| Example box (outside) | 31 1/2″ × 18 1/8″ × 19 3/4″ |
Thiele/Small parameters
| Fs | 31.4 Hz |
|---|---|
| Qts | 0.55 |
| Qes | 0.62 |
| Qms | 5.04 |
| Vas | 2.45 ft³ |
| Re (one coil) | 2.05 Ω |
| Sd | ≈ 124 in² |
| Xmax | ≈ 0.39″ |
| EBP | 51 — sealed or ported calc. |
| Sensitivity, 1 W / 1 m | 87.4 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 Flex 15″ · dual 2 Ω