SPL Dynamics SPL-460D1A
18″ subwoofer · dual 1 Ω · 1,500 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, 1,500 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) | 19 11/16″ × 19 11/16″ × 12 7/8″ |
Ported
deeper, louder| Tuning (Fb) | 32 Hz |
|---|---|
| Port | slot 3 15/16 × 19 1/16″, 27 1/2″ long |
| Port velocity at 1,500 W | 63 ft/s |
| F3 (−3 dB, no cabin gain) | 30 Hz |
| Example box (outside) | 31 1/2″ × 20 1/2″ × 23 5/16″ |
Deeper: 5.01 ft³ (142 L) tuned to 32 Hz, 31 1/2″ × 20 1/2″ × 21 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 | 18″ |
|---|---|
| Voice coils | dual 1 Ω |
| RMS power | 1,500 W |
| Fs | 29.1 Hz |
| Qts | 0.39 |
| Qes | 0.42 |
| Qms | 4.81 |
| Vas | 5.14 ft³ |
| Re (one coil) | 0.75 Ω |
|---|---|
| Sd | 190.2 in² |
| Xmax | 0.45″ |
| Vd | 86.1 in³ calc. |
| Mms | 437 g calc. |
| BL | 12 T·m calc. |
| EBP | 69 — sealed or ported calc. |
| Sensitivity, 1 W / 1 m | 91.3 dB calc. |
Mounting dimensions
| Cutout diameter | 16 11/16″ |
|---|---|
| Mounting depth | 10 7/16″ |
| Overall diameter | 18 1/2″ |
Cone area (Sd) calculated from Fs, Vas and Mms: 190.2 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 SPL Dynamics 18″ models
- SPL Dynamics SPL-460D2 18″ · dual 2 Ω
Similar 18″ subwoofers from other brands
Close in Fs, Qts and Vas — a box of similar volume will suit them.
- Deaf Bonce Apocalypse DB-4518R D1 2.88 ft³ sealed · 5.33 ft³ ported
- Deaf Bonce Apocalypse DB-4518R D2 2.88 ft³ sealed · 5.33 ft³ ported
- Sundown Audio Uv1-18 D4 1.80 ft³ sealed · 5.90 ft³ ported
- Fi Audio Xv5 18 D2 1.92 ft³ sealed · 3.74 ft³ ported
- Audiopipe TXX-BD2W-18 1.98 ft³ sealed · 5.12 ft³ ported
- Sundown Audio Xv2-18 D2 1.89 ft³ sealed · 4.34 ft³ ported
FAQ
What box does the SPL Dynamics SPL-460D1A need?
Recommended net volume: 1.92 ft³ sealed, 5.65 ft³ ported tuned to 32 Hz — for one sub in a sedan at 1,500 W. Fit the box to your space and amp in the free calculator, with plans and a cut sheet.
What are the SPL Dynamics SPL-460D1A Thiele/Small specs?
Fs 29.1 Hz, Qts 0.39, Vas 5.14 ft³, Xmax 0.45″, Sd 190.2 in².
What is the SPL Dynamics SPL-460D1A mounting depth?
Mounting depth is 10 7/16″, cutout diameter 16 11/16″. The inside depth of the box must exceed the mounting depth by at least 1″.
How much power does the SPL Dynamics SPL-460D1A handle and how do I wire it?
RMS power rating: 1,500 W. Dual 1 Ω voice coils: series gives 2 Ω, parallel gives 0.5 Ω at the amp. Wiring for several subs and amp power — in the wiring calculator.