Hertz Energy ES 250 (SVC 4 ohm)
10″ subwoofer · 4 Ω · 250 W RMS
| Source | web.archive.org · manufacturer data |
|---|---|
| Checked against source | October 2026 |
| Thiele/Small parameters | complete |
| Mounting dimensions | 3 of 4 — missing: magnet diameter; the designer will use an estimate |
Recommended box
For a sedan, one sub, 250 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, tighter| Bass character (Qtc) | Tight and punchy · 0.86 |
|---|---|
| Fc | 43 Hz |
| F3 (−3 dB, no cabin gain) | 39 Hz |
| Example box (outside) | 12 3/16″ × 12 3/16″ × 20 11/16″ |
Ported
deeper, louder| Tuning (Fb) | 30 Hz |
|---|---|
| Port | slot 1 9/16 × 14 5/16″, 40 3/16″ long |
| Port velocity at 250 W | 36 ft/s |
| F3 (−3 dB, no cabin gain) | 29 Hz |
| Example box (outside) | 31 1/2″ × 15 3/4″ × 10 5/8″ |
Deeper: 2.12 ft³ (60 L) tuned to 30 Hz, 31 1/2″ × 15 3/4″ × 12 3/16″ outside — a bigger box with flatter deep bass. Open in the calculator
Projects with this subwoofer
Boxes that users designed and published: plans, cut sheet and response graph.
Thiele/Small parameters
| Size | 10″ |
|---|---|
| Voice coils | 4 Ω |
| RMS power | 250 W |
| Fs | 27 Hz |
| Qts | 0.54 |
| Qes | 0.58 |
| Qms | 7.5 |
| Vas | 1.91 ft³ |
| Re | 2.9 Ω |
|---|---|
| Sd | 54.7 in² |
| Xmax | 0.35″ |
| Vd | 19.4 in³ calc. |
| Mms | 114 g calc. |
| BL | 9.8 T·m calc. |
| EBP | 47 — suits sealed calc. |
| Sensitivity, 1 W / 1 m | 84.6 dB calc. |
Mounting dimensions
| Cutout diameter | 9 3/16″ |
|---|---|
| Mounting depth | 4 11/16″ |
| Overall diameter | 10 3/8″ |
“≈” 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 10″ models
- Hertz Cento CS 250 S2 (SVC 2 ohm) 10″ · 2 Ω
- Hertz Cento CS 250 S4 (SVC 4 ohm) 10″ · 4 Ω
- Hertz Dieci DS 25.3 (SVC 4 ohm) 10″ · 4 Ω
- Hertz Dieci DS 250.3 (SVC 4 ohm) 10″ · 4 Ω
- Hertz Energy ES 250.5 (SVC 4 ohm) 10″ · 4 Ω
- Hertz Energy ES 250D (DVC 4+4 ohm) 10″ · dual 4 Ω
- Hertz Energy ES 250D.5 (DVC 4 ohm) 10″ · dual 4 Ω
- Hertz Energy ES F25.5 (free-air/shallow, SVC 4 ohm) 10″ · 4 Ω
- Hertz Hi-Energy HX 250 (SVC 4 ohm) 10″ · 4 Ω
- Hertz Hi-Energy HX 250 D (DVC 4+4 ohm) 10″ · dual 4 Ω
- Hertz Mille Legend ML 2500.3 (SVC 4 ohm) 10″ · 4 Ω
- Hertz Mille Pro MP 250 D2.3 (DVC 2+2 ohm) 10″ · dual 2 Ω
Similar 10″ subwoofers from other brands
Close in Fs, Qts and Vas — a box of similar volume will suit them.
- Orion XTR104D / XTR10D4 (XTR 10" DVC 4ohm) 1.27 ft³ sealed · 1.02 ft³ ported
- Lanzar MAX10D 1.09 ft³ sealed · 1.45 ft³ ported
- Kicx Terza M10 (4+4) 1.17 ft³ sealed · 1.13 ft³ ported
- Treo TSi10.4 1.34 ft³ sealed · 1.62 ft³ ported
- Dayton Audio RSS265HF-8 1.06 ft³ sealed · 1.91 ft³ ported
- Audison Prima APS 10 D (DVC 4+4 ohm) 1.02 ft³ sealed · 1.17 ft³ ported
FAQ
What box does the Hertz Energy ES 250 (SVC 4 ohm) need?
Recommended net volume: 1.24 ft³ sealed, 1.52 ft³ ported tuned to 30 Hz — for one sub in a sedan at 250 W. Fit the box to your space and amp in the free calculator, with plans and a cut sheet.
What are the Hertz Energy ES 250 (SVC 4 ohm) Thiele/Small specs?
Fs 27 Hz, Qts 0.54, Vas 1.91 ft³, Xmax 0.35″, Sd 54.7 in².
What is the Hertz Energy ES 250 (SVC 4 ohm) mounting depth?
Mounting depth is 4 11/16″, cutout diameter 9 3/16″. The inside depth of the box must exceed the mounting depth by at least 1″.
How much power does the Hertz Energy ES 250 (SVC 4 ohm) handle and how do I wire it?
RMS power rating: 250 W. Wiring for several subs and amp power — in the wiring calculator.