SPL Dynamics PRO-380D2
15″ subwoofer · dual 2 Ω · 750 W RMS
| Source | web.archive.org · manufacturer data |
|---|---|
| Checked against source | October 2026 |
| Thiele/Small parameters | not in the spec sheet: Re, Sd — typical value for the size used |
| Mounting dimensions | 2 of 4 — missing: frame outer diameter, magnet diameter; the designer will use an estimate |
Recommended box
For a sedan, one sub, 750 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 · 0.74 |
|---|---|
| Fc | 56 Hz |
| F3 (−3 dB, no cabin gain) | 57 Hz |
| Example box (outside) | 16 15/16″ × 16 15/16″ × 10 13/16″ |
Ported
deeper, louder| Tuning (Fb) | 34 Hz |
|---|---|
| Port | slot 1 3/4 × 16 5/16″, 28 3/16″ long |
| Port velocity at 750 W | 65 ft/s |
| F3 (−3 dB, no cabin gain) | 34 Hz |
| Example box (outside) | 31 1/2″ × 17 11/16″ × 11 7/16″ |
Deeper: 3.00 ft³ (85 L) tuned to 32 Hz, 31 1/2″ × 17 11/16″ × 15 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 | 15″ |
|---|---|
| Voice coils | dual 2 Ω |
| RMS power | 750 W |
| Fs | 31 Hz |
| Qts | 0.41 |
| Qes | 0.46 |
| Qms | 3.77 |
| Vas | 2.58 ft³ |
|---|---|
| Re (one coil) | ≈ 1.7 Ω |
| Sd | ≈ 124 in² |
| Xmax | 0.51″ |
| EBP | 67 — sealed or ported calc. |
| Sensitivity, 1 W / 1 m | 88.8 dB calc. |
Mounting dimensions
| Cutout diameter | 13 7/8″ |
|---|---|
| Mounting depth | 7 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 SPL Dynamics 15″ models
- SPL Dynamics PRO-15D2 MK3 15″ · dual 2 Ω
- SPL Dynamics PRO-15D2 MK4 15″ · dual 2 Ω
- SPL Dynamics PRO-15D4 MK3 15″ · dual 4 Ω
- SPL Dynamics PRO-15D4 MK4 15″ · dual 4 Ω
- SPL Dynamics PRO-380D4 15″ · dual 4 Ω
- SPL Dynamics SPL-380D1A 15″ · dual 1 Ω
- SPL Dynamics SPL-380D2 15″ · dual 2 Ω
- SPL Dynamics XTR-380D2S 15″ · dual 2 Ω
- SPL Dynamics XTR-380D4S 15″ · dual 4 Ω
Similar 15″ subwoofers from other brands
Close in Fs, Qts and Vas — a box of similar volume will suit them.
- Kicx Gorilla Bass E15 (2+2) 1.09 ft³ sealed · 2.05 ft³ ported
- Deaf Bonce Apocalypse DB-SA2615 D2 1.13 ft³ sealed · 2.12 ft³ ported
- Machete MFX38 D2 1.13 ft³ sealed · 1.98 ft³ ported
- American Bass XFL-1522 1.34 ft³ sealed · 3.00 ft³ ported
- Fi Audio Q15 D1 1.25 ft³ sealed · 2.15 ft³ ported
- Fi Audio Q15 NEO D1 1.62 ft³ sealed · 2.15 ft³ ported
FAQ
What box does the SPL Dynamics PRO-380D2 need?
Recommended net volume: 1.13 ft³ sealed, 2.05 ft³ ported tuned to 34 Hz — for one sub in a sedan at 750 W. Fit the box to your space and amp in the free calculator, with plans and a cut sheet.
What are the SPL Dynamics PRO-380D2 Thiele/Small specs?
Fs 31 Hz, Qts 0.41, Vas 2.58 ft³, Xmax 0.51″.
What is the SPL Dynamics PRO-380D2 mounting depth?
Mounting depth is 7 3/8″, cutout diameter 13 7/8″. The inside depth of the box must exceed the mounting depth by at least 1″.
How much power does the SPL Dynamics PRO-380D2 handle and how do I wire it?
RMS power rating: 750 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.