Soundstream SPLX-152HX
15″ subwoofer · dual 2 Ω · 1,250 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, 1,250 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) | Tight and punchy · 0.80 |
|---|---|
| Fc | 53 Hz |
| F3 (−3 dB, no cabin gain) | 51 Hz |
| Example box (outside) | 17 5/16″ × 17 5/16″ × 12 1/2″ |
Ported
deeper, louder| Tuning (Fb) | 30 Hz |
|---|---|
| Port | slot 3 1/8 × 16 11/16″, 32 7/16″ long |
| Port velocity at 1,250 W | 63 ft/s |
| F3 (−3 dB, no cabin gain) | 29 Hz |
| Example box (outside) | 31 1/2″ × 18 1/8″ × 20″ |
Deeper: 4.63 ft³ (131 L) tuned to 28 Hz, 31 1/2″ × 18 1/8″ × 22 1/2″ 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 | 15″ |
|---|---|
| Voice coils | dual 2 Ω |
| RMS power | 1,250 W |
| Fs | 25.3 Hz |
| Qts | 0.38 |
| Qes | 0.43 |
| Qms | 3.13 |
| Vas | 5.03 ft³ |
| Re (one coil) | 1.9 Ω |
|---|---|
| Sd | 136.6 in² |
| Xmax | 0.73″ |
| Vd | 100 in³ calc. |
| Mms | 307 g calc. |
| BL | 14.7 T·m calc. |
| EBP | 59 — sealed or ported calc. |
| Sensitivity, 1 W / 1 m | 89.3 dB calc. |
Mounting dimensions
| Cutout diameter | 14 1/8″ |
|---|---|
| Mounting depth | 8 3/8″ |
| Overall diameter | 15 1/4″ |
“≈” 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 Soundstream 15″ models
- Soundstream PCW-15 15″ · dual 4 Ω
- Soundstream PWS-15 15″ · dual 4 Ω
- Soundstream PXW-15 15″ · dual 4 Ω
- Soundstream PXW-15/2 15″ · dual 2 Ω
- Soundstream R1-15 15″ · dual 4 Ω
- Soundstream R1-15L 15″ · dual 4 Ω
- Soundstream R3.15 15″ · dual 2 Ω
- Soundstream RBW-15 15″ · dual 4 Ω
- Soundstream SPLX-152 ('07-'08) 15″ · dual 2 Ω
- Soundstream SPLX-152 (2006) 15″ · dual 2 Ω
- Soundstream SPLX-154 ('07-'08) 15″ · 4 Ω
- Soundstream SPLX-154 (2006) 15″ · 4 Ω
Similar 15″ subwoofers from other brands
Close in Fs, Qts and Vas — a box of similar volume will suit them.
- MTX Audio T8154 1.45 ft³ sealed · 4.10 ft³ ported
- Kicker CompVR 15" 2-Ohm DVC (43CVR152) 1.34 ft³ sealed · 3.85 ft³ ported
- Hertz Hi-Energy HX 380 D (DVC 4+4 ohm) 1.55 ft³ sealed · 3.67 ft³ ported
- Pride Junior Pro 15 D2 1.84 ft³ sealed · 3.60 ft³ ported
- PowerBass 3XL-1501D 1.32 ft³ sealed · 3.92 ft³ ported
- Rockville W15K5S2 1.34 ft³ sealed · 2.75 ft³ ported
FAQ
What box does the Soundstream SPLX-152HX need?
Recommended net volume: 1.45 ft³ sealed, 4.06 ft³ ported tuned to 30 Hz — for one sub in a sedan at 1,250 W. Fit the box to your space and amp in the free calculator, with plans and a cut sheet.
What are the Soundstream SPLX-152HX Thiele/Small specs?
Fs 25.3 Hz, Qts 0.38, Vas 5.03 ft³, Xmax 0.73″, Sd 136.6 in².
What is the Soundstream SPLX-152HX mounting depth?
Mounting depth is 8 3/8″, cutout diameter 14 1/8″. The inside depth of the box must exceed the mounting depth by at least 1″.
How much power does the Soundstream SPLX-152HX handle and how do I wire it?
RMS power rating: 1,250 W. Dual 2 Ω voice coils: series gives 4 Ω, parallel gives 1 Ω at the amp. Wiring for several subs and amp power — in the wiring calculator.