Soundstream SPLX-152 (2006)
15″ subwoofer · dual 2 Ω · 750 W RMS
The Soundstream SPLX-152 (2006) is a 15″ subwoofer. With Qts 0.42 and EBP 82 it works both sealed and ported: sealed is tighter and smaller, ported is deeper and louder. Modest excursion (Xmax 0.57″) — for clean sound at moderate levels, not for SPL competitions.
| Source | web.archive.org · manufacturer data |
|---|---|
| Checked against source | October 2026 |
| Thiele/Small parameters | complete |
| Mounting dimensions | 0 of 4 — missing: cutout, mounting depth, frame outer diameter, magnet diameter; the designer will use an estimate |
Recommended box
For a sedan, one sub, 750 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) | Flat and accurate · 0.74 |
|---|---|
| Fc | 67 Hz |
| F3 (−3 dB, no cabin gain) | 68 Hz |
| Example box (outside) | 17 5/16″ × 17 5/16″ × 10 5/16″ |
Ported
deeper, louder| Tuning (Fb) | 34 Hz |
|---|---|
| Port | slot 1 3/4 × 16 11/16″, 30 1/16″ long |
| Port velocity at 750 W | 61 ft/s |
| F3 (−3 dB, no cabin gain) | 41 Hz |
| Example box (outside) | 31 1/2″ × 18 1/8″ × 11 3/16″ |
Deeper: 2.90 ft³ (82 L) tuned to 38 Hz, 31 1/2″ × 18 1/8″ × 14 3/16″ 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 | 750 W |
| Fs | 38.3 Hz |
| Qts | 0.42 |
| Qes | 0.465 |
| Qms | 4.59 |
| Vas | 2.31 ft³ |
| Re (one coil) | 1.77 Ω |
|---|---|
| Sd | 124 in² |
| Xmax | 0.57″ |
| Vd | 70.3 in³ calc. |
| Mms | 240 g calc. |
| BL | 14.8 T·m calc. |
| EBP | 82 — sealed or ported calc. |
| Sensitivity, 1 W / 1 m | 91 dB calc. |
Mounting dimensions
| Cutout diameter | ≈ 14″ |
|---|---|
| Mounting depth | ≈ 7 1/16″ |
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
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-152HX 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.
- SPL Dynamics PRO-15D2 MK4 1.20 ft³ sealed · 2.12 ft³ ported
- SPL Dynamics PRO-15D4 MK4 1.13 ft³ sealed · 1.98 ft³ ported
- Audioque HDC315-A D1 1.27 ft³ sealed · 2.19 ft³ ported
- Fi Audio SSD NEO 15 D1 1.31 ft³ sealed · 2.01 ft³ ported
- Fi Audio SSD NEO 15 D2 1.31 ft³ sealed · 2.01 ft³ ported
- ESX VE1522 (2x2 Ohm) 1.48 ft³ sealed · 3.88 ft³ ported
FAQ
What box does the Soundstream SPLX-152 (2006) need?
Recommended net volume: 1.13 ft³ sealed, 1.98 ft³ ported tuned to 34 Hz — for one sub in a sedan at 750 W. Fit the box to your space and amp in the free calculator, with plans and a cut sheet.
What are the Soundstream SPLX-152 (2006) Thiele/Small specs?
Fs 38.3 Hz, Qts 0.42, Vas 2.31 ft³, Xmax 0.57″, Sd 124 in².
How much power does the Soundstream SPLX-152 (2006) handle and how do I wire it?
RMS power rating: 750 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.
Is the Soundstream SPLX-152 (2006) better sealed or ported?
EBP 82: both work — sealed 1.13 ft³ is tighter and smaller, ported 1.98 ft³ tuned to 34 Hz is deeper and louder.
What port does the Soundstream SPLX-152 (2006) need?
For the 1.98 ft³ ported box tuned to 34 Hz: slot 1 3/4 × 16 11/16″, 30 1/16″ long, area 29.6 in²; or a round port Ø6 1/8″, ≈ 30 1/16″ long. Port air speed at 750 W: 61 ft/s.
What box do two Soundstream SPLX-152 (2006) subs need?
Two subs need twice the volume: 2.26 ft³ sealed, or 3.96 ft³ ported at the same 34 Hz tuning with twice the port area. One shared chamber or one per sub — whatever fits your vehicle.