Deaf Bonce Apocalypse DB-SA418 D2
18″ subwoofer · dual 2 Ω · 3,500 W RMS
Fs 29 HzQts 0.42Vas 6.18 ft³Xmax 1.26″
Recommended box
For a sedan, one sub, 3,500 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
| Net volume | 2.47 ft³ (70 L) |
|---|---|
| Qtc | 0.79 |
| Fc | 54 Hz |
| F3 (−3 dB, no cabin gain) | 52 Hz |
| Example box (outside) | 20 1/16″ × 20 1/16″ × 15 1/16″ |
Ported
| Net volume | 6.99 ft³ (198 L) |
|---|---|
| Tuning (Fb) | 31 Hz |
| Port | slot 5 7/8 × 19 7/16″, 36 13/16″ long |
| Port velocity at 3,500 W | 69 ft/s |
| F3 (−3 dB, no cabin gain) | 29 Hz |
| Example box (outside) | 31 1/2″ × 20 7/8″ × 30 11/16″ |
Thiele/Small parameters
| Fs | 29 Hz |
|---|---|
| Qts | 0.42 |
| Qes | 0.452 |
| Qms | 6 |
| Vas | 6.18 ft³ |
| Re (one coil) | 1.4 Ω |
| Sd | ≈ 180.6 in² |
| Xmax | 1.26″ |
| EBP | 64 — sealed or ported calc. |
| Sensitivity, 1 W / 1 m | 91.8 dB calc. |
General
| Size | 18″ |
|---|---|
| Voice coils | dual 2 Ω |
| RMS power | 3,500 W |
Mounting dimensions
| Cutout diameter | 16 7/8″ |
|---|---|
| Mounting depth | 12 11/16″ |
Only Qts is published — Qms assumed to be 6 and Qes calculated (barely affects box design).
“≈” 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 Deaf Bonce 18″ models
- Deaf Bonce Apocalypse DB-4518R D1 18″ · dual 1 Ω
- Deaf Bonce Apocalypse DB-4518R D2 18″ · dual 2 Ω
- Deaf Bonce Apocalypse DB-SA418 D1 18″ · dual 1 Ω