Orion Cobalt 12 SVC (original)
12″ subwoofer · 4 Ω
| 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 26 g — unusual for a 12″; 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) | Boomy, with a bump · 1.46 |
|---|---|
| Fc | 88 Hz |
| F3 (−3 dB, no cabin gain) | 65 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 | 24 ft/s |
| F3 (−3 dB, no cabin gain) | 58 Hz |
| Example box (outside) | 31 1/2″ × 15 3/4″ × 12 7/8″ |
Deeper: 3.04 ft³ (86 L) tuned to 50 Hz, 31 1/2″ × 15 3/4″ × 14 1/4″ 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 | 12″ |
|---|---|
| Voice coils | 4 Ω |
| RMS power | — |
| Fs | 27 Hz |
| Qts | 0.45 |
| Qes | 0.56 |
| Qms | 2.21 |
| Vas | 17.11 ft³ |
| Re | 3.6 Ω |
|---|---|
| Sd | 78 in² |
| Xmax | 0.38″ |
| Vd | 29.8 in³ calc. |
| Mms | 26 g calc. |
| BL | 5.3 T·m calc. |
| EBP | 48 — suits sealed calc. |
| Sensitivity, 1 W / 1 m | 94.3 dB calc. |
Mounting dimensions
| Cutout diameter | 11 1/8″ |
|---|---|
| Mounting depth | 5 1/2″ |
| Overall diameter | 12 1/2″ |
“≈” 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 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 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
- Orion XTR 12 DVC (original) 12″ · dual 4 Ω
Similar 12″ subwoofers from other brands
Close in Fs, Qts and Vas — a box of similar volume will suit them.
- Audiobahn AWP312 1.73 ft³ sealed · 2.26 ft³ ported
- JL Audio 12W1-8 1.80 ft³ sealed · 2.33 ft³ ported
- Rockford Fosgate Punch Z RFZ3412 1.91 ft³ sealed · 2.47 ft³ ported
- Polk Audio GXR124 1.87 ft³ sealed · 2.44 ft³ ported
- JL Audio 12W0-8 1.87 ft³ sealed · 2.44 ft³ ported
- Bomber Upgrade Professional 400W 4 Ohm (SW12UP400-4) 1.91 ft³ sealed · 1.91 ft³ ported
FAQ
What box does the Orion Cobalt 12 SVC (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 Cobalt 12 SVC (original) Thiele/Small specs?
Fs 27 Hz, Qts 0.45, Vas 17.11 ft³, Xmax 0.38″, Sd 78 in².
What is the Orion Cobalt 12 SVC (original) mounting depth?
Mounting depth is 5 1/2″, cutout diameter 11 1/8″. The inside depth of the box must exceed the mounting depth by at least 1″.