Fi Audio SSD-EL 15 D1
15″ subwoofer · dual 1 Ω · 1,500 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, 1,500 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) | Tight and punchy · 0.80 |
|---|---|
| Fc | 58 Hz |
| F3 (−3 dB, no cabin gain) | 55 Hz |
| Example box (outside) | 17 5/16″ × 17 5/16″ × 10 9/16″ |
Ported
deeper, louder| Tuning (Fb) | 33 Hz |
|---|---|
| Port | slot 2 15/16 × 16 11/16″, 40 1/2″ long |
| Port velocity at 1,500 W | 63 ft/s |
| F3 (−3 dB, no cabin gain) | 33 Hz |
| Example box (outside) | 31 1/2″ × 18 1/8″ × 15 3/4″ |
Deeper: 3.81 ft³ (108 L) tuned to 31 Hz, 31 1/2″ × 18 1/8″ × 20 11/16″ 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 1 Ω |
| RMS power | 1,500 W |
| Fs | 29.6 Hz |
| Qts | 0.41 |
| Qes | 0.43 |
| Qms | 8.73 |
| Vas | 3.28 ft³ |
| Re (one coil) | 0.7 Ω |
|---|---|
| Sd | 125.6 in² |
| Xmax | 0.87″ |
| Vd | 108.7 in³ calc. |
| Mms | 289 g calc. |
| BL | 9.4 T·m calc. |
| EBP | 69 — sealed or ported calc. |
| Sensitivity, 1 W / 1 m | 89.5 dB calc. |
Mounting dimensions
| Cutout diameter | 14 1/8″ |
|---|---|
| Mounting depth | 8″ |
| Overall diameter | 15 5/8″ |
“≈” 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/20161021221840/http://www.ficaraudio.com:80/product/ssd-el-s
- web.archive.org/web/20161102052614/http://www.ficaraudio.com:80/product/ssd-el-s
Other Fi Audio 15″ models
- Fi Audio Alpha v1 15 S1 15″ · 1 Ω
- Fi Audio Alpha v1 15 S2 15″ · 2 Ω
- Fi Audio Alpha v1 15 S4 15″ · 4 Ω
- Fi Audio Alpha v2 15 S2 15″ · 2 Ω
- Fi Audio Alpha v2 15 S4 15″ · 4 Ω
- Fi Audio BL-NEO 15 D1 15″ · dual 1 Ω
- Fi Audio BL-NEO 15 D2 15″ · dual 2 Ω
- Fi Audio BL15 D1 15″ · dual 1 Ω
- Fi Audio BL15 D2 15″ · dual 2 Ω
- Fi Audio BL15v3 D1 15″ · dual 1 Ω
- Fi Audio BL15v3 D2 15″ · dual 2 Ω
- Fi Audio BL15v3.1 D1 15″ · dual 1 Ω
Similar 15″ subwoofers from other brands
Close in Fs, Qts and Vas — a box of similar volume will suit them.
- Orion NT 15 DVC 1.17 ft³ sealed · 2.61 ft³ ported
- Kicker CompR 15" 2-Ohm DVC (48CWR152) 1.31 ft³ sealed · 3.99 ft³ ported
- Kicker CompR 15" 2-Ohm DVC (43CWR152) 1.34 ft³ sealed · 2.75 ft³ ported
- MTX Audio TX615 1.24 ft³ sealed · 2.54 ft³ ported
- URAL Pobeda 15 (2+2) 1.24 ft³ sealed · 2.79 ft³ ported
- Kicker CompR 15" 4-Ohm DVC (43CWR154) 1.91 ft³ sealed · 2.65 ft³ ported
FAQ
What box does the Fi Audio SSD-EL 15 D1 need?
Recommended net volume: 1.17 ft³ sealed, 2.61 ft³ ported tuned to 33 Hz — for one sub in a sedan at 1,500 W. Fit the box to your space and amp in the free calculator, with plans and a cut sheet.
What are the Fi Audio SSD-EL 15 D1 Thiele/Small specs?
Fs 29.6 Hz, Qts 0.41, Vas 3.28 ft³, Xmax 0.87″, Sd 125.6 in².
What is the Fi Audio SSD-EL 15 D1 mounting depth?
Mounting depth is 8″, cutout diameter 14 1/8″. The inside depth of the box must exceed the mounting depth by at least 1″.
How much power does the Fi Audio SSD-EL 15 D1 handle and how do I wire it?
RMS power rating: 1,500 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.