Avatar Doomsday 15 D2
15″ subwoofer · dual 2 Ω · 3,500 W RMS
Fs 31 HzQts 0.52Vas 1.68 ft³Xmax 0.79″
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 | 1.48 ft³ (42 L) |
|---|---|
| Qtc | 0.76 |
| Fc | 45 Hz |
| F3 (−3 dB, no cabin gain) | 44 Hz |
| Example box (outside) | 16 15/16″ × 16 15/16″ × 13 5/16″ |
Ported
| Net volume | 3.85 ft³ (109 L) |
|---|---|
| Tuning (Fb) | 26 Hz |
| Port | slot 4 1/2 × 16 5/16″, 68 11/16″ long |
| Port velocity at 3,500 W | 77 ft/s |
| F3 (−3 dB, no cabin gain) | 23 Hz |
| Example box (outside) | 31 1/2″ × 17 11/16″ × 27 3/16″ |
Thiele/Small parameters
| Fs | 31 Hz |
|---|---|
| Qts | 0.52 |
| Qes | 0.569 |
| Qms | 6 |
| Vas | 1.68 ft³ |
| Re (one coil) | ≈ 1.7 Ω |
| Sd | ≈ 124 in² |
| Xmax | 0.79″ |
| EBP | 54 — sealed or ported calc. |
| Sensitivity, 1 W / 1 m | 86 dB calc. |
General
| Size | 15″ |
|---|---|
| Voice coils | dual 2 Ω |
| RMS power | 3,500 W |
Mounting dimensions
| Cutout diameter | 13 3/4″ |
|---|---|
| Mounting depth | 10 7/8″ |
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 Avatar 15″ models
- Avatar Doomsday 15 D1 15″ · dual 1 Ω
- Avatar SST-15 15″ · 4 Ω
- Avatar SST-315 D2 15″ · dual 2 Ω
- Avatar Volcano 15 D1 15″ · dual 1 Ω
- Avatar Volcano 15 D2 15″ · dual 2 Ω