Fi Audio TEAM v2 18 (3″ VC) D1
18″ subwoofer · dual 1 Ω · 2,500 W RMS
| 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, 2,500 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) | Dry and tight · 0.46 |
|---|---|
| Fc | 55 Hz |
| F3 (−3 dB, no cabin gain) | 99 Hz |
| Example box (outside) | 20 1/16″ × 20 1/16″ × 14 5/8″ |
Ported
deeper, louder| Tuning (Fb) | 34 Hz |
|---|---|
| Port | slot 5 11/16 × 19 7/16″, 37 5/8″ long |
| Port velocity at 2,500 W | 63 ft/s |
| F3 (−3 dB, no cabin gain) | 64 Hz |
| Example box (outside) | 31 1/2″ × 20 7/8″ × 26 3/8″ |
Deeper: 3.60 ft³ (102 L) tuned to 35 Hz, 31 1/2″ × 20 7/8″ × 19 7/8″ 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 | 18″ |
|---|---|
| Voice coils | dual 1 Ω |
| RMS power | 2,500 W |
| Fs | 32.4 Hz |
| Qts | 0.27 |
| Qes | 0.28 |
| Qms | 7.75 |
| Vas | 4.42 ft³ |
| Re (one coil) | 0.9 Ω |
|---|---|
| Sd | 187.6 in² |
| Xmax | 1.34″ |
| Vd | 251.1 in³ calc. |
| Mms | 400 g calc. |
| BL | 16.2 T·m calc. |
| EBP | 116 — suits ported calc. |
| Sensitivity, 1 W / 1 m | 93.8 dB calc. |
Mounting dimensions
| Cutout diameter | 16 3/4″ |
|---|---|
| Mounting depth | 12 1/4″ |
| Overall diameter | 18 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
- web.archive.org/web/20191122074714/https://ficaraudio.com/product/team-series-te
- web.archive.org/web/20191122080405/https://ficaraudio.com/product/team-series-te
Other Fi Audio 18″ models
- Fi Audio BL-NEO 18 D1 18″ · dual 1 Ω
- Fi Audio BL-NEO 18 D2 18″ · dual 2 Ω
- Fi Audio BL18v3 D1 18″ · dual 1 Ω
- Fi Audio BL18v3 D2 18″ · dual 2 Ω
- Fi Audio BL18v3.1 D1 18″ · dual 1 Ω
- Fi Audio BL18v3.1 D2 18″ · dual 2 Ω
- Fi Audio BTL-NEO18 D1 18″ · dual 1 Ω
- Fi Audio BTL-NEO18 D2 18″ · dual 2 Ω
- Fi Audio BTL3 18 D1 18″ · dual 1 Ω
- Fi Audio BTL3 18 D2 18″ · dual 2 Ω
- Fi Audio BTL4 18 D1 18″ · dual 1 Ω
- Fi Audio BTL4 18 D2 18″ · dual 2 Ω
Similar 18″ subwoofers from other brands
Close in Fs, Qts and Vas — a box of similar volume will suit them.
- Sundown Audio Uv1-18 D2 1.80 ft³ sealed · 5.90 ft³ ported
- Ascendant Audio SMD Signature 18 D2 2.95 ft³ sealed · 5.54 ft³ ported
- Ascendant Audio SMD Signature 18 D1 2.95 ft³ sealed · 5.54 ft³ ported
- Sundown Audio Uv1-18 D4 1.80 ft³ sealed · 5.90 ft³ ported
- Sundown Audio NSv4-18 D2 2.86 ft³ sealed · 5.23 ft³ ported
- Edge EDX18D1-E7 1.62 ft³ sealed · 5.33 ft³ ported
FAQ
What box does the Fi Audio TEAM v2 18 (3″ VC) D1 need?
Recommended net volume: 2.38 ft³ sealed, 5.54 ft³ ported tuned to 34 Hz — for one sub in a sedan at 2,500 W. Fit the box to your space and amp in the free calculator, with plans and a cut sheet.
What are the Fi Audio TEAM v2 18 (3″ VC) D1 Thiele/Small specs?
Fs 32.4 Hz, Qts 0.27, Vas 4.42 ft³, Xmax 1.34″, Sd 187.6 in².
What is the Fi Audio TEAM v2 18 (3″ VC) D1 mounting depth?
Mounting depth is 12 1/4″, cutout diameter 16 3/4″. The inside depth of the box must exceed the mounting depth by at least 1″.
How much power does the Fi Audio TEAM v2 18 (3″ VC) D1 handle and how do I wire it?
RMS power rating: 2,500 W. Dual 1 Ω voice coils: series gives 2 Ω, parallel gives 0.5 Ω at the amp. Wiring for several subs and amp power — in the wiring calculator.