Diamond D310D2
10″ subwoofer · dual 2 Ω · 400 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, 400 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) | Flat and accurate · 0.75 |
|---|---|
| Fc | 59 Hz |
| F3 (−3 dB, no cabin gain) | 58 Hz |
| Example box (outside) | 12 5/8″ × 12 5/8″ × 9 1/8″ |
Ported
deeper, louder| Tuning (Fb) | 38 Hz |
|---|---|
| Port | slot 1 3/16 × 14 5/16″, 33 9/16″ long |
| Port velocity at 400 W | 59 ft/s |
| F3 (−3 dB, no cabin gain) | 35 Hz |
| Example box (outside) | 15 1/8″ × 15 3/4″ × 13 3/4″ |
Deeper: 1.31 ft³ (37 L) tuned to 33 Hz, 21 1/2″ × 15 3/4″ × 13 3/4″ 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 | dual 2 Ω |
| RMS power | 400 W |
| Fs | 38.1 Hz |
| Qts | 0.49 |
| Qes | 0.534 |
| Qms | 5.73 |
| Vas | 0.68 ft³ |
| Re (one coil) | 1.7 Ω |
|---|---|
| Sd | 53.6 in² |
| Xmax | 0.47″ |
| Vd | 25.1 in³ calc. |
| Mms | 153 g calc. |
| BL | 10.8 T·m calc. |
| EBP | 71 — sealed or ported calc. |
| Sensitivity, 1 W / 1 m | 85 dB calc. |
Mounting dimensions
| Cutout diameter | 9 1/4″ |
|---|---|
| Mounting depth | 6 9/16″ |
| 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 Diamond 10″ models
- Diamond CM310D2 10″ · dual 2 Ω
- Diamond CM310D4 10″ · dual 4 Ω
- Diamond D102 10″ · dual 2 Ω
- Diamond D104 10″ · dual 4 Ω
- Diamond D310D4 10″ · dual 4 Ω
- Diamond D610D2 10″ · dual 2 Ω
- Diamond D610D4 10″ · dual 4 Ω
- Diamond D910D2 10″ · dual 2 Ω
- Diamond D910D4 10″ · dual 4 Ω
- Diamond DE102 10″ · dual 2 Ω
- Diamond DE104 10″ · dual 4 Ω
- Diamond H102 10″ · dual 2 Ω
Similar 10″ subwoofers from other brands
Close in Fs, Qts and Vas — a box of similar volume will suit them.
- Pioneer TS-W257D2 0.46 ft³ sealed · 0.78 ft³ ported
- Swat REV-10 0.46 ft³ sealed · 0.85 ft³ ported
- CT Sounds HYDRO-10 D2 0.49 ft³ sealed · 0.88 ft³ ported
- Focal K2 Power E25KX (DVC 4 ohm, predecessor of SUB 25 KXE) 0.53 ft³ sealed · 0.81 ft³ ported
- Focal K2 Power SUB 25 KXE (DVC 4+4 ohm) 0.53 ft³ sealed · 0.81 ft³ ported
- American Bass XO-1044 0.49 ft³ sealed · 0.81 ft³ ported
FAQ
What box does the Diamond D310D2 need?
Recommended net volume: 0.49 ft³ sealed, 0.85 ft³ ported tuned to 38 Hz — for one sub in a sedan at 400 W. Fit the box to your space and amp in the free calculator, with plans and a cut sheet.
What are the Diamond D310D2 Thiele/Small specs?
Fs 38.1 Hz, Qts 0.49, Vas 0.68 ft³, Xmax 0.47″, Sd 53.6 in².
What is the Diamond D310D2 mounting depth?
Mounting depth is 6 9/16″, cutout diameter 9 1/4″. The inside depth of the box must exceed the mounting depth by at least 1″.
How much power does the Diamond D310D2 handle and how do I wire it?
RMS power rating: 400 W. Dual 2 Ω voice coils: series gives 4 Ω, parallel gives 1 Ω at the amp. Wiring for several subs and amp power — in the wiring calculator.