Hertz Dieci DS 38.3 (SVC 4 ohm)
15″ subwoofer · 4 Ω · 300 W RMS
Fs 23 HzQts 0.65Vas 8.62 ft³Xmax 0.35″
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 | 2.97 ft³ (84 L) |
|---|---|
| Qtc | 1.29 |
| Fc | 45 Hz |
| F3 (−3 dB, no cabin gain) | 34 Hz |
| Example box (outside) | 31 1/2″ × 17 11/16″ × 12 1/2″ |
Ported
| Net volume | 5.05 ft³ (143 L) |
|---|---|
| Tuning (Fb) | 35 Hz |
| Port | slot 1 3/4 × 16 5/16″, 8 1/16″ long |
| Port velocity at 300 W | 59 ft/s |
| F3 (−3 dB, no cabin gain) | 31 Hz |
| Example box (outside) | 31 1/2″ × 17 11/16″ × 20 7/16″ |
Thiele/Small parameters
| Fs | 23 Hz |
|---|---|
| Qts | 0.65 |
| Qes | 0.74 |
| Qms | 5.4 |
| Vas | 8.62 ft³ |
| Re | 3.3 Ω |
| Sd | 130.8 in² |
| Xmax | 0.35″ |
| Vd | 46.4 in³ calc. |
| Mms | 198 g calc. |
| BL | 11.3 T·m calc. |
| EBP | 31 — suits sealed calc. |
| Sensitivity, 1 W / 1 m | 88 dB calc. |
General
| Size | 15″ |
|---|---|
| Voice coils | 4 Ω |
| RMS power | 300 W |
Mounting dimensions
| Cutout diameter | 13 3/4″ |
|---|---|
| Mounting depth | 6″ |
| Overall diameter | 15 1/4″ |
Cone area (Sd) calculated from Fs, Vas and Mms: 130.8 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
Other Hertz 15″ models
- 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
- Hertz SPL Show SX 380D (DVC 2+2 ohm) 15″ · dual 2 Ω