Hertz Dieci DS 300.3 (SVC 4 ohm)
12″ subwoofer · 4 Ω · 300 W RMS
34 HzFs, resonance
0.51Qts
2.01 ft³Vas
0.39″Xmax
300 WRMS
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
smaller, tighter1.38 ft³ (39 L)
Net volume
| Qtc | 0.80 |
|---|---|
| Fc | 53 Hz |
| F3 (−3 dB, no cabin gain) | 50 Hz |
| Example box (outside) | 31 1/2″ × 15 3/4″ × 7 3/8″ |
Ported
deeper, louder3.14 ft³ (89 L)
Net volume
| Tuning (Fb) | 33 Hz |
|---|---|
| Port | slot 1 3/4 × 14 5/16″, 15 11/16″ long |
| Port velocity at 300 W | 64 ft/s |
| F3 (−3 dB, no cabin gain) | 30 Hz |
| Example box (outside) | 31 1/2″ × 15 3/4″ × 15 5/8″ |
Thiele/Small parameters
| Fs | 34 Hz |
|---|---|
| Qts | 0.51 |
| Qes | 0.56 |
| Qms | 5.67 |
| Vas | 2.01 ft³ |
| Re | 3.4 Ω |
| Sd | 81.2 in² |
| Xmax | 0.39″ |
| Vd | 32 in³ calc. |
| Mms | 150 g calc. |
| BL | 13.9 T·m calc. |
| EBP | 61 — sealed or ported calc. |
| Sensitivity, 1 W / 1 m | 88 dB calc. |
General
| Size | 12″ |
|---|---|
| Voice coils | 4 Ω |
| RMS power | 300 W |
Mounting dimensions
| Cutout diameter | 11″ |
|---|---|
| Mounting depth | 4 13/16″ |
| Overall diameter | 12 1/16″ |
Cone area (Sd) calculated from Fs, Vas and Mms: 81.2 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 12″ models
- Hertz Cento CS 300 S2 (SVC 2 ohm) 12″ · 2 Ω
- Hertz Cento CS 300 S4 (SVC 4 ohm) 12″ · 4 Ω
- Hertz Dieci DS 30.3 (SVC 4 ohm) 12″ · 4 Ω
- Hertz Energy ES 300.5 (SVC 4 ohm) 12″ · 4 Ω
- Hertz Energy ES 300D.5 (DVC 4+4 ohm) 12″ · dual 4 Ω
- Hertz Energy ES F30.5 (free-air/shallow, SVC 4 ohm) 12″ · 4 Ω
- Hertz Hi-Energy HX 300 (SVC 4 ohm) 12″ · 4 Ω
- Hertz Hi-Energy HX 300 D (DVC 4+4 ohm) 12″ · dual 4 Ω
- Hertz Mille Pro MP 300 D2.3 (DVC 2+2 ohm) 12″ · dual 2 Ω
- Hertz Mille Pro MP 300 D4.3 (DVC 4+4 ohm) 12″ · dual 4 Ω
- Hertz Mille Pro MPS 300 S2 (shallow, SVC 2 ohm) 12″ · 2 Ω
- Hertz Mille Pro MPS 300 S4 (shallow, SVC 4 ohm) 12″ · 4 Ω