RE Audio XX15 D4 v2
15″ subwoofer · dual 4 Ω · 1,500 W RMS
Fs 22.2 HzQts 0.41Vas 3.59 ft³
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
| Net volume | 1.77 ft³ (50 L) |
|---|---|
| Qtc | 0.72 |
| Fc | 39 Hz |
| F3 (−3 dB, no cabin gain) | 40 Hz |
| Example box (outside) | 17 11/16″ × 17 11/16″ × 14 1/16″ |
Ported
| Net volume | 4.27 ft³ (121 L) |
|---|---|
| Tuning (Fb) | 25 Hz |
| Port | slot 3 3/8 × 17 1/16″, 51″ long |
| Port velocity at 1,500 W | 65 ft/s |
| F3 (−3 dB, no cabin gain) | 23 Hz |
| Example box (outside) | 31 1/2″ × 18 1/2″ × 22 15/16″ |
Thiele/Small parameters
| Fs | 22.2 Hz |
|---|---|
| Qts | 0.41 |
| Qes | 0.444 |
| Qms | 6.14 |
| Vas | 3.59 ft³ |
| Re (one coil) | 3.02 Ω |
| Sd | 128.6 in² |
| Xmax | ≈ 0.39″ |
| Mms | 491 g calc. |
| BL | 21.6 T·m calc. |
| EBP | 50 — sealed or ported calc. |
| Sensitivity, 1 W / 1 m | 86 dB calc. |
General
| Size | 15″ |
|---|---|
| Voice coils | dual 4 Ω |
| RMS power | 1,500 W |
Mounting dimensions
| Cutout diameter | 14 1/2″ |
|---|---|
| Mounting depth | 11 9/16″ |
| Overall diameter | 16″ |
Judging by its value, the published Re is for both coils in parallel — converted to per coil.
“≈” 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
- reaudio.com/THIELESPDF/xx15v2_info%20(1).pdf
- reaudio.com/products/woofers_xx.php
- reaudio.com/Catalog_2017.pdf
- reaudio.com/products/BOX%20V2%20PDF/XX%2015%20SEALED(1).pdf
Other RE Audio 15″ models
- RE Audio SEX15 D4 v2 15″ · dual 4 Ω
- RE Audio SRX15 D4 15″ · dual 4 Ω
- RE Audio SXX15 D4 v2 15″ · dual 4 Ω
- RE Audio XX15 D2 v2 15″ · dual 2 Ω
- RE Audio XXX15 D4 v2 15″ · dual 4 Ω