Orion XTR 15 DVC (original)
15″ subwoofer · dual 4 Ω
The Orion XTR 15 DVC (original) is a 15″ subwoofer. With Qts 0.37 and EBP 67 it works both sealed and ported: sealed is tighter and smaller, ported is deeper and louder. Modest excursion (Xmax 0.25″) — 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 | 3 of 4 — missing: magnet diameter; the designer will use an estimate |
- Fs, Vas and Sd give a moving mass of 88 g — unusual for a 15″; check Vas against the spec sheet.
Recommended box
For a sedan, one sub, 300 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 · 0.84 |
|---|---|
| Fc | 64 Hz |
| F3 (−3 dB, no cabin gain) | 59 Hz |
| Example box (outside) | 31 1/2″ × 17 11/16″ × 12 3/8″ |
Ported
deeper, louder| Tuning (Fb) | 31 Hz |
|---|---|
| Port | slot 1 9/16 × 16 5/16″, 14 11/16″ long |
| Port velocity at 300 W | 44 ft/s |
| F3 (−3 dB, no cabin gain) | 46 Hz |
| Example box (outside) | 31 1/2″ × 17 11/16″ × 16 3/8″ |
Deeper: 4.94 ft³ (140 L) tuned to 42 Hz, 31 1/2″ × 17 11/16″ × 19 3/4″ 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 4 Ω |
| RMS power | — |
| Fs | 28 Hz |
| Qts | 0.37 |
| Qes | 0.42 |
| Qms | 2.98 |
| Vas | 12.50 ft³ |
| Re (one coil) | 3.85 Ω |
|---|---|
| Sd | 128 in² |
| Xmax | 0.25″ |
| Vd | 31.7 in³ calc. |
| Mms | 88 g calc. |
| BL | 11.9 T·m calc. |
| EBP | 67 — sealed or ported calc. |
| Sensitivity, 1 W / 1 m | 94.7 dB calc. |
Mounting dimensions
| Cutout diameter | 13 7/8″ |
|---|---|
| Mounting depth | 6 3/4″ |
| Overall diameter | 15 1/2″ |
Where it fits in a vehicle
Spots from our vehicle guides where the cutout, mounting depth and recommended box fit. The spot sizes are approximate — measure your own vehicle.
- Excursion — behind the third row sealed box
“≈” 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
Voice coil versions
The same sub with different voice coils: the parameters are nearly the same — pick by your amp and wiring.
| Model | Voice coils | Re | Qes | Vas | Sealed | Ported |
|---|---|---|---|---|---|---|
| Orion XTR 15 SVC (original) | 4 Ω | 3.5 Ω | 0.67 | 11.70 ft³ | 2.93 ft³ | 3.78 ft³ · 33 Hz |
| Orion XTR 15 DVC (original) | dual 4 Ω | 3.85 Ω | 0.42 | 12.50 ft³ | 2.93 ft³ | 3.78 ft³ · 31 Hz |
Other Orion 15″ models
- Orion 2NT 15 DVC 15″ · dual 4 Ω
- Orion 2NT 15 SVC 15″ · 4 Ω
- Orion Cobalt 15 DVC (1999) 15″ · dual 4 Ω
- Orion Cobalt 15 DVC (original) 15″ · dual 4 Ω
- Orion Cobalt 15 SVC (1999) 15″ · 4 Ω
- Orion Cobalt 15 SVC (original) 15″ · 4 Ω
- Orion HCCA 15D 15″ · dual 2 Ω
- Orion HCCA 15D (1999) 15″ · dual 2 Ω
- Orion HCCA152 (HCCA 15" DVC 2ohm) 15″ · dual 2 Ω
- Orion HCCA152SPL (HCCA SPL 15" DVC 2ohm) 15″ · dual 2 Ω
- Orion HCCA154 (HCCA 15" DVC 4ohm) 15″ · dual 4 Ω
- Orion HCCA154SPL (HCCA SPL 15" DVC 4ohm) 15″ · dual 4 Ω
Similar 15″ subwoofers from other brands
Close in Fs, Qts and Vas — a box of similar volume will suit them.
- JBL P1500 3.21 ft³ sealed · 4.17 ft³ ported
- Soundstream USA15 2.83 ft³ sealed · 3.88 ft³ ported
- Rockford Fosgate Punch XLC RFP-1415 (1996) 3.04 ft³ sealed · 3.96 ft³ ported
- Elemental Designs 16Ov.2 2.40 ft³ sealed · 3.99 ft³ ported
- Audiobahn AW1571X 2.61 ft³ sealed · 3.67 ft³ ported
- Audiopipe TS-AR15 2.83 ft³ sealed · 3.67 ft³ ported
FAQ
What box does the Orion XTR 15 DVC (original) need?
Recommended net volume: 2.93 ft³ sealed, 3.78 ft³ ported tuned to 31 Hz — for one sub in a sedan at 300 W. Fit the box to your space and amp in the free calculator, with plans and a cut sheet.
What are the Orion XTR 15 DVC (original) Thiele/Small specs?
Fs 28 Hz, Qts 0.37, Vas 12.50 ft³, Xmax 0.25″, Sd 128 in².
What is the Orion XTR 15 DVC (original) mounting depth?
Mounting depth is 6 3/4″, cutout diameter 13 7/8″. The inside depth of the box must exceed the mounting depth by at least 1″.
Is the Orion XTR 15 DVC (original) better sealed or ported?
EBP 67: both work — sealed 2.93 ft³ is tighter and smaller, ported 3.78 ft³ tuned to 31 Hz is deeper and louder.
What port does the Orion XTR 15 DVC (original) need?
For the 3.78 ft³ ported box tuned to 31 Hz: slot 1 9/16 × 16 5/16″, 14 11/16″ long, area 25.7 in²; or a round port Ø5 11/16″, ≈ 14 11/16″ long. Port air speed at 300 W: 44 ft/s.
What box do two Orion XTR 15 DVC (original) subs need?
Two subs need twice the volume: 5.86 ft³ sealed, or 7.56 ft³ ported at the same 31 Hz tuning with twice the port area. One shared chamber or one per sub — whatever fits your vehicle.