Hertz SPL Show SX 380D (DVC 2+2 ohm)
15″ subwoofer · dual 2 Ω · 1,000 W RMS
Fs 43 HzQts 0.65Vas 1.59 ft³Xmax 0.55″
Recommended box
For a sedan, one sub, 1,000 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 | 2.83 ft³ (80 L) |
|---|---|
| Qtc | 0.81 |
| Fc | 54 Hz |
| F3 (−3 dB, no cabin gain) | 49 Hz |
| Example box (outside) | 31 1/2″ × 17 11/16″ × 12″ |
Ported
| Net volume | 4.80 ft³ (136 L) |
|---|---|
| Tuning (Fb) | 34 Hz |
| Port | slot 3 15/16 × 16 5/16″, 24 1/4″ long |
| Port velocity at 1,000 W | 63 ft/s |
| F3 (−3 dB, no cabin gain) | 29 Hz |
| Example box (outside) | 31 1/2″ × 17 11/16″ × 22 1/2″ |
Thiele/Small parameters
| Fs | 43 Hz |
|---|---|
| Qts | 0.65 |
| Qes | 0.7 |
| Qms | 9.3 |
| Vas | 1.59 ft³ |
| Re (one coil) | 2 Ω |
| Sd | 123.6 in² |
| Xmax | 0.55″ |
| Vd | 68.1 in³ calc. |
| Mms | 274 g calc. |
| BL | 14.5 T·m calc. |
| EBP | 61 — sealed or ported calc. |
| Sensitivity, 1 W / 1 m | 89.1 dB calc. |
General
| Size | 15″ |
|---|---|
| Voice coils | dual 2 Ω |
| RMS power | 1,000 W |
Mounting dimensions
| Cutout diameter | 13 13/16″ |
|---|---|
| Mounting depth | 7 1/8″ |
| Overall diameter | 15 3/8″ |
Cone area (Sd) calculated from Fs, Vas and Mms: 123.6 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
- static.hertz-audio.com/media/2021/04/hertz_SX_2010_AdvancedManual.pdf
- static.hertz-audio.com/media/2021/04/HERTZ_SPL_Tech_Sheet_SX380D1.pdf
Other Hertz 15″ models
- Hertz Dieci DS 38.3 (SVC 4 ohm) 15″ · 4 Ω
- Hertz Energy ES 380.5 (SVC 4 ohm) 15″ · 4 Ω
- Hertz Hi-Energy HX 380 (SVC 4 ohm) 15″ · 4 Ω
- Hertz Hi-Energy HX 380 D (DVC 4+4 ohm) 15″ · dual 4 Ω
- Hertz SPL Show SS 15 D2 (DVC 2+2 ohm) 15″ · dual 2 Ω