RE Audio SXX15 D4 v2
15″ subwoofer · dual 4 Ω · 1,200 W RMS
Fs 44.7 HzQts 0.91Vas 1.31 ft³
Recommended box
For a sedan, one sub, 1,200 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 | 2.61 ft³ (74 L) |
|---|---|
| Qtc | 1.11 |
| Fc | 55 Hz |
| F3 (−3 dB, no cabin gain) | 42 Hz |
| Example box (outside) | 31 1/2″ × 18 1/8″ × 11″ |
Ported
| Net volume | 4.98 ft³ (141 L) |
|---|---|
| Tuning (Fb) | 34 Hz |
| Port | slot 4 5/16 × 16 11/16″, 26 9/16″ long |
| Port velocity at 1,200 W | 63 ft/s |
| F3 (−3 dB, no cabin gain) | 28 Hz |
| Example box (outside) | 31 1/2″ × 18 1/8″ × 23 3/8″ |
Thiele/Small parameters
| Fs | 44.7 Hz |
|---|---|
| Qts | 0.91 |
| Qes | 0.998 |
| Qms | 10.22 |
| Vas | 1.31 ft³ |
| Re (one coil) | 4.07 Ω |
| Sd | 128.6 in² |
| Xmax | ≈ 0.39″ |
| Mms | 334 g calc. |
| BL | 19.5 T·m calc. |
| EBP | 45 — suits sealed calc. |
| Sensitivity, 1 W / 1 m | 87.2 dB calc. |
General
| Size | 15″ |
|---|---|
| Voice coils | dual 4 Ω |
| RMS power | 1,200 W |
Mounting dimensions
| Cutout diameter | 14″ |
|---|---|
| Mounting depth | 8 1/2″ |
| Overall diameter | 15 1/2″ |
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/sxx15v2_info.pdf
- reaudio.com/products/woofers_sxx_v2.php
- reaudio.com/Catalog_2017.pdf
- reaudio.com/products/BOX%20V2%20PDF/SXX%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 XX15 D2 v2 15″ · dual 2 Ω
- RE Audio XX15 D4 v2 15″ · dual 4 Ω
- RE Audio XXX15 D4 v2 15″ · dual 4 Ω