Sundown Audio LCSv1-12 D4
12″ subwoofer · dual 4 Ω · 300 W RMS
| Source | web.archive.org · manufacturer data |
|---|---|
| Checked against source | October 2026 |
| Thiele/Small parameters | complete |
| Mounting dimensions | 0 of 4 — missing: cutout, mounting depth, frame outer diameter, 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 | 56 Hz |
| F3 (−3 dB, no cabin gain) | 53 Hz |
| Example box (outside) | 14 3/16″ × 14 3/16″ × 13 7/16″ |
Ported
deeper, louder| Tuning (Fb) | 34 Hz |
|---|---|
| Port | slot 1 9/16 × 14 5/16″, 31 1/4″ long |
| Port velocity at 300 W | 42 ft/s |
| F3 (−3 dB, no cabin gain) | 35 Hz |
| Example box (outside) | 31 1/2″ × 15 3/4″ × 10 1/16″ |
Deeper: 3.00 ft³ (85 L) tuned to 31 Hz, 31 1/2″ × 15 3/4″ × 15 3/8″ 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 | 12″ |
|---|---|
| Voice coils | dual 4 Ω |
| RMS power | 300 W |
| Fs | 33.4 Hz |
| Qts | 0.48 |
| Qes | 0.548 |
| Qms | 3.68 |
| Vas | 1.85 ft³ |
| Re (one coil) | 3.45 Ω |
|---|---|
| Sd | 77.4 in² |
| Xmax | 0.55″ |
| Vd | 42.7 in³ calc. |
| Mms | 152 g calc. |
| BL | 14.2 T·m calc. |
| EBP | 61 — sealed or ported calc. |
| Sensitivity, 1 W / 1 m | 87.5 dB calc. |
Mounting dimensions
| Cutout diameter | ≈ 11 1/8″ |
|---|---|
| Mounting depth | ≈ 5 7/8″ |
Cone area (Sd) calculated from Fs, Vas and Mms: 77.4 in².
“≈” 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/20210125001103/https://sundownaudio.com/lv/sa/subwoofers/lcs
- web.archive.org/web/20190916094513/https://sundownaudio.com/index.php/products/s
Other Sundown Audio 12″ models
- Sundown Audio Ev2-12 D2 12″ · dual 2 Ω
- Sundown Audio Ev2-12 D4 12″ · dual 4 Ω
- Sundown Audio Ev4-12 D2 12″ · dual 2 Ω
- Sundown Audio Ev4-12 D4 12″ · dual 4 Ω
- Sundown Audio HZ-12 D4 12″ · dual 4 Ω
- Sundown Audio HZS-12 D4 12″ · dual 4 Ω
- Sundown Audio LCSv2-12 D4 12″ · dual 4 Ω
- Sundown Audio M12 D1 12″ · dual 1 Ω
- Sundown Audio M12 D2 12″ · dual 2 Ω
- Sundown Audio NSv1-12 D2 12″ · dual 2 Ω
- Sundown Audio NSv2-12 D2 12″ · dual 2 Ω
- Sundown Audio NSv4-12 D1 12″ · dual 1 Ω
Similar 12″ subwoofers from other brands
Close in Fs, Qts and Vas — a box of similar volume will suit them.
- Audiobahn AW1200X 0.99 ft³ sealed · 1.41 ft³ ported
- Hertz Hi-Energy HX 300 (SVC 4 ohm) 0.95 ft³ sealed · 1.41 ft³ ported
- Dayton Audio LS12-44 1.31 ft³ sealed · 1.59 ft³ ported
- Audiofrog G12D2 1.17 ft³ sealed · 1.62 ft³ ported
- Diamond D312D2 1.24 ft³ sealed · 1.45 ft³ ported
- Bomber Bicho Papão 800W 4+4 Ohm (SW12BP-800-4+4) 0.88 ft³ sealed · 1.27 ft³ ported
FAQ
What box does the Sundown Audio LCSv1-12 D4 need?
Recommended net volume: 1.02 ft³ sealed, 1.48 ft³ ported tuned to 34 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 Sundown Audio LCSv1-12 D4 Thiele/Small specs?
Fs 33.4 Hz, Qts 0.48, Vas 1.85 ft³, Xmax 0.55″, Sd 77.4 in².
How much power does the Sundown Audio LCSv1-12 D4 handle and how do I wire it?
RMS power rating: 300 W. Dual 4 Ω voice coils: series gives 8 Ω, parallel gives 2 Ω at the amp. Wiring for several subs and amp power — in the wiring calculator.