Diamond CM310D4
10″ subwoofer · dual 4 Ω
| 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, 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, tighter| Bass character (Qtc) | Tight and punchy · 0.80 |
|---|---|
| Fc | 54 Hz |
| F3 (−3 dB, no cabin gain) | 50 Hz |
| Example box (outside) | 12 3/16″ × 12 3/16″ × 13 3/8″ |
Ported
deeper, louder| Tuning (Fb) | 38 Hz |
|---|---|
| Port | slot 1 × 14 5/16″, 29 1/16″ long |
| Port velocity at 300 W | 61 ft/s |
| F3 (−3 dB, no cabin gain) | 34 Hz |
| Example box (outside) | 14 11/16″ × 15 3/4″ × 12 13/16″ |
Deeper: 1.84 ft³ (52 L) tuned to 30 Hz, 31 1/2″ × 15 3/4″ × 11 3/8″ 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 4 Ω |
| RMS power | — |
| Fs | 42 Hz |
| Qts | 0.63 |
| Qes | 0.7 |
| Qms | 5.9 |
| Vas | 0.47 ft³ |
| Re (one coil) | 3.2 Ω |
|---|---|
| Sd | 51.2 in² |
| Xmax | 0.47″ |
| Vd | 24.2 in³ calc. |
| Mms | 167 g calc. |
| BL | 14.2 T·m calc. |
| EBP | 60 — sealed or ported calc. |
| Sensitivity, 1 W / 1 m | 83.5 dB calc. |
Mounting dimensions
| Cutout diameter | 9 3/16″ |
|---|---|
| Mounting depth | 5 5/8″ |
| Overall diameter | 10 5/16″ |
“≈” 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
- web.archive.org/web/20070830083842/http://www.diamondaudio.com/PDF/archive/CM3/C
- web.archive.org/web/20050405075111/http://www.diamondaudio.com:80/products/pdfs/
Other Diamond 10″ models
- Diamond CM310D2 10″ · dual 2 Ω
- Diamond D102 10″ · dual 2 Ω
- Diamond D104 10″ · dual 4 Ω
- Diamond D310D2 10″ · dual 2 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.
- American Bass XD-1044 0.67 ft³ sealed · 0.85 ft³ ported
- Ground Zero GZIW 10SPL (2x2 Ohm) 0.74 ft³ sealed · 0.85 ft³ ported
- Quantum Audio QWX4000/10D4 0.67 ft³ sealed · 0.78 ft³ ported
- Rockford Fosgate Punch P3SD2-10 (Shallow) 0.88 ft³ sealed · 0.92 ft³ ported
- CT Sounds TROPO-10 D2 0.78 ft³ sealed · 1.02 ft³ ported
- Memphis Car Audio MJP1044 (MOJO Pro 10" DVC 4ohm) 0.74 ft³ sealed · 0.88 ft³ ported
FAQ
What box does the Diamond CM310D4 need?
Recommended net volume: 0.74 ft³ sealed, 0.81 ft³ ported tuned to 38 Hz — for one sub in a sedan at 300 W. Fit the box to your space and amp in the free calculator, with plans and a cut sheet.
What are the Diamond CM310D4 Thiele/Small specs?
Fs 42 Hz, Qts 0.63, Vas 0.47 ft³, Xmax 0.47″, Sd 51.2 in².
What is the Diamond CM310D4 mounting depth?
Mounting depth is 5 5/8″, cutout diameter 9 3/16″. The inside depth of the box must exceed the mounting depth by at least 1″.