Orion XTR 12 DVC (original)
12″ subwoofer · dual 4 Ω
The Orion XTR 12 DVC (original) is a shallow 12″ sub (5″ mounting depth): it fits behind a truck seat or in a slim box. With Qts 0.39 and EBP 50 it works both sealed and ported: sealed is tighter and smaller, ported is deeper and louder. Modest excursion (Xmax 0.30″) — 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 |
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 · 0.80 |
|---|---|
| Fc | 49 Hz |
| F3 (−3 dB, no cabin gain) | 47 Hz |
| Example box (outside) | 31 1/2″ × 15 3/4″ × 8 15/16″ |
Ported
deeper, louder| Tuning (Fb) | 30 Hz |
|---|---|
| Port | slot 1 9/16 × 14 5/16″, 25 1/4″ long |
| Port velocity at 300 W | 43 ft/s |
| F3 (−3 dB, no cabin gain) | 34 Hz |
| Example box (outside) | 31 1/2″ × 15 3/4″ × 12 7/8″ |
Deeper: 3.04 ft³ (86 L) tuned to 33 Hz, 31 1/2″ × 15 3/4″ × 15″ 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 | 12″ |
|---|---|
| Voice coils | dual 4 Ω |
| RMS power | — |
| Fs | 24 Hz |
| Qts | 0.39 |
| Qes | 0.48 |
| Qms | 2.17 |
| Vas | 5.54 ft³ |
| Re (one coil) | 3.95 Ω |
|---|---|
| Sd | 78 in² |
| Xmax | 0.30″ |
| Vd | 23 in³ calc. |
| Mms | 101 g calc. |
| BL | 11.2 T·m calc. |
| EBP | 50 — sealed or ported calc. |
| Sensitivity, 1 W / 1 m | 88.6 dB calc. |
Mounting dimensions
| Cutout diameter | 11 1/8″ |
|---|---|
| Mounting depth | 5″ |
| Overall diameter | 12 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.
- Bronco 4-door — behind the rear seat sealed and ported box
- Wrangler 4-door, hard top — behind the rear seat sealed and ported box
- Wrangler 4-door, soft top — behind the rear seat sealed and ported box
- Silverado / Sierra Crew Cab — under the rear seat sealed box
- FJ Cruiser — behind the rear seat sealed and ported box
- El Camino 1978–87 — behind the seat sealed and ported box
- Cherokee XJ — cargo area, spare moved out sealed and ported box
- Excursion — behind the third row sealed and ported box
- Mustang 2015–2023 coupe — trunk sealed and ported box
- Challenger / Charger — trunk sealed and ported box
- Club Car Precedent — under the rear seat 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 12 SVC (original) | 4 Ω | 3.6 Ω | 0.69 | 7.35 ft³ | 1.77 ft³ | 2.30 ft³ · 31 Hz |
| Orion XTR 12 DVC (original) | dual 4 Ω | 3.95 Ω | 0.48 | 5.54 ft³ | 1.77 ft³ | 2.30 ft³ · 30 Hz |
Other Orion 12″ models
- Orion 2NT 12 DVC 12″ · dual 4 Ω
- Orion 2NT 12 SVC 12″ · 4 Ω
- Orion Cobalt 12 DVC (1999) 12″ · dual 4 Ω
- Orion Cobalt 12 DVC (original) 12″ · dual 4 Ω
- Orion Cobalt 12 SVC (1999) 12″ · 4 Ω
- Orion Cobalt 12 SVC (original) 12″ · 4 Ω
- Orion HCCA 12D 12″ · dual 2 Ω
- Orion HCCA 12D (1999) 12″ · dual 2 Ω
- Orion HCCA122 (HCCA 12" DVC 2ohm) 12″ · dual 2 Ω
- Orion HCCA124 (HCCA 12" DVC 4ohm) 12″ · dual 4 Ω
- Orion NT 12 DVC 12″ · dual 4 Ω
- Orion NT 12 SVC 12″ · 4 Ω
Similar 12″ subwoofers from other brands
Close in Fs, Qts and Vas — a box of similar volume will suit them.
- Rockford Fosgate Punch Z RFZ3412 1.91 ft³ sealed · 2.47 ft³ ported
- Kenwood KFC-PS3016W 1.91 ft³ sealed · 1.80 ft³ ported
- JL Audio 12W0-8 1.87 ft³ sealed · 2.44 ft³ ported
- Infinity Kappa 120.1DVC 1.80 ft³ sealed · 2.33 ft³ ported
- Audiobahn AW1251 1.73 ft³ sealed · 2.26 ft³ ported
- Dayton Audio SD315A-88 1.13 ft³ sealed · 2.40 ft³ ported
FAQ
What box does the Orion XTR 12 DVC (original) need?
Recommended net volume: 1.77 ft³ sealed, 2.30 ft³ ported tuned to 30 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 12 DVC (original) Thiele/Small specs?
Fs 24 Hz, Qts 0.39, Vas 5.54 ft³, Xmax 0.30″, Sd 78 in².
What is the Orion XTR 12 DVC (original) mounting depth?
Mounting depth is 5″, cutout diameter 11 1/8″. The inside depth of the box must exceed the mounting depth by at least 1″.
Is the Orion XTR 12 DVC (original) better sealed or ported?
EBP 50: both work — sealed 1.77 ft³ is tighter and smaller, ported 2.30 ft³ tuned to 30 Hz is deeper and louder.
What port does the Orion XTR 12 DVC (original) need?
For the 2.30 ft³ ported box tuned to 30 Hz: slot 1 9/16 × 14 5/16″, 25 1/4″ long, area 22.6 in²; or a round port Ø5 3/8″, ≈ 25 1/4″ long. Port air speed at 300 W: 43 ft/s.
What box do two Orion XTR 12 DVC (original) subs need?
Two subs need twice the volume: 3.53 ft³ sealed, or 4.59 ft³ ported at the same 30 Hz tuning with twice the port area. One shared chamber or one per sub — whatever fits your vehicle.