Orion Cobalt 8 SVC (original)
8″ 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 |
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 · 0.81 |
|---|---|
| Fc | 80 Hz |
| F3 (−3 dB, no cabin gain) | 75 Hz |
| Example box (outside) | 10 1/4″ × 10 1/4″ × 9 1/4″ |
Ported
deeper, louder| Tuning (Fb) | 49 Hz |
|---|---|
| Port | 2 round ports Ø2 1/2″, 15 5/8″ long |
| Port velocity at 300 W | 77 ft/s |
| F3 (−3 dB, no cabin gain) | 47 Hz |
| Example box (outside) | 21 1/8″ × 15 3/4″ × 6 5/16″ |
Deeper: 1.09 ft³ (31 L) tuned to 41 Hz, 31 1/2″ × 15 3/4″ × 8″ 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 | 8″ |
|---|---|
| Voice coils | 4 Ω |
| RMS power | — |
| Fs | 43 Hz |
| Qts | 0.44 |
| Qes | 0.53 |
| Qms | 2.52 |
| Vas | 0.78 ft³ |
| Re | 3.8 Ω |
|---|---|
| Sd | 31 in² |
| Xmax | 0.22″ |
| Vd | 7 in³ calc. |
| Mms | 35 g calc. |
| BL | 8.2 T·m calc. |
| EBP | 81 — sealed or ported calc. |
| Sensitivity, 1 W / 1 m | 87.2 dB calc. |
Mounting dimensions
| Cutout diameter | 7 1/4″ |
|---|---|
| Mounting depth | 3 7/8″ |
| Overall diameter | 8 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 8″ models
- Orion Cobalt 8 DVC (1999) 8″ · dual 4 Ω
- Orion Cobalt 8 DVC (original) 8″ · dual 4 Ω
- Orion Cobalt 8 SVC (1999) 8″ · 4 Ω
- Orion XTR 8 DVC (original) 8″ · dual 4 Ω
- Orion XTR 8 SVC (original) 8″ · 4 Ω
- Orion XTR2 8 DVC 8″ · dual 4 Ω
- Orion XTR2 8 SVC 8″ · 4 Ω
- Orion Xtreme 8 DVC 8″ · dual 4 Ω
- Orion Xtreme 8 SVC 8″ · 4 Ω
Similar 8″ subwoofers from other brands
Close in Fs, Qts and Vas — a box of similar volume will suit them.
- Dayton Audio PCS8-4 0.42 ft³ sealed · 0.57 ft³ ported
- Lanzar MAX8 0.32 ft³ sealed · 0.99 ft³ ported
- Audison Prima APBMW S8-2.2 (BMW/MINI underseat, SVC 2 ohm) 0.53 ft³ sealed · 0.64 ft³ ported
- ESX SXE8D2 (2x2 Ohm) 0.32 ft³ sealed · 0.99 ft³ ported
- Ground Zero GZTW 20TX (2x2 Ohm) 0.60 ft³ sealed · 0.60 ft³ ported
- Ground Zero GZIW 200X (4 Ohm) 0.53 ft³ sealed · 0.78 ft³ ported
FAQ
What box does the Orion Cobalt 8 SVC (original) need?
Recommended net volume: 0.32 ft³ sealed, 0.64 ft³ ported tuned to 49 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 8 SVC (original) Thiele/Small specs?
Fs 43 Hz, Qts 0.44, Vas 0.78 ft³, Xmax 0.22″, Sd 31 in².
What is the Orion Cobalt 8 SVC (original) mounting depth?
Mounting depth is 3 7/8″, cutout diameter 7 1/4″. The inside depth of the box must exceed the mounting depth by at least 1″.