Elemental Designs e12K (2003)
12″ subwoofer · DVC · 400 W RMS
| Source | web.archive.org · manufacturer data |
|---|---|
| Checked against source | October 2026 |
| Thiele/Small parameters | complete |
| Mounting dimensions | 2 of 4 — missing: frame outer diameter, magnet diameter; the designer will use an estimate |
Recommended box
For a sedan, one sub, 400 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 | 53 Hz |
| F3 (−3 dB, no cabin gain) | 51 Hz |
| Example box (outside) | 14 3/16″ × 14 3/16″ × 10 7/16″ |
Ported
deeper, louder| Tuning (Fb) | 30 Hz |
|---|---|
| Port | slot 1 9/16 × 14 5/16″, 25 3/4″ long |
| Port velocity at 400 W | 65 ft/s |
| F3 (−3 dB, no cabin gain) | 29 Hz |
| Example box (outside) | 31 1/2″ × 15 3/4″ × 12 3/4″ |
Deeper: 2.37 ft³ (67 L) tuned to 28 Hz, 31 1/2″ × 15 3/4″ × 13 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 | DVC |
| RMS power | 400 W |
| Fs | 24 Hz |
| Qts | 0.36 |
| Qes | 0.39 |
| Qms | 4.97 |
| Vas | 2.93 ft³ |
| Re (one coil) | 0.88 Ω |
|---|---|
| Sd | 76 in² |
| Xmax | 0.62″ |
| Vd | 47.2 in³ calc. |
| Mms | 180 g calc. |
| BL | 7.8 T·m calc. |
| EBP | 62 — sealed or ported calc. |
| Sensitivity, 1 W / 1 m | 86.7 dB calc. |
Mounting dimensions
| Cutout diameter | 11 1/8″ |
|---|---|
| Mounting depth | 5 7/8″ |
“≈” 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/20041116132955/http://www.edesignaudio.com/archive/2003KSeri
- web.archive.org/web/20030425032141/http://edesignaudio.com/ep/specsold/03kts.htm
Other Elemental Designs 12″ models
- Elemental Designs 13Kv.2 12″ · DVC
- Elemental Designs 13Ov.2 12″ · DVC
- Elemental Designs e3.12 12″ · dual 2 Ω
- Elemental Designs e5.12 12″ · dual 2 Ω
- Elemental Designs E12a (2002) 12″ · DVC
- Elemental Designs e12A (2003) 12″
- Elemental Designs E12k (2002) 12″
- Elemental Designs e12kd4 12″ · DVC
- Elemental Designs E12o 12″ · DVC
- Elemental Designs e12O.14 12″ · 4 Ω
- Elemental Designs e12O.44 12″ · dual 4 Ω
Similar 12″ subwoofers from other brands
Close in Fs, Qts and Vas — a box of similar volume will suit them.
- RE Audio SRX12 D4 0.88 ft³ sealed · 2.19 ft³ ported
- Dayton Audio RSS315HF-4 0.92 ft³ sealed · 2.12 ft³ ported
- Infinity Reference 1260W 0.88 ft³ sealed · 2.44 ft³ ported
- ARC Audio Flatline FL12D4 0.79 ft³ sealed · 2.51 ft³ ported
- Pioneer TS-W12PRS 1.02 ft³ sealed · 2.08 ft³ ported
- Dayton Audio DCS305-4 1.06 ft³ sealed · 3.11 ft³ ported
FAQ
What box does the Elemental Designs e12K (2003) need?
Recommended net volume: 0.74 ft³ sealed, 2.26 ft³ ported tuned to 30 Hz — for one sub in a sedan at 400 W. Fit the box to your space and amp in the free calculator, with plans and a cut sheet.
What are the Elemental Designs e12K (2003) Thiele/Small specs?
Fs 24 Hz, Qts 0.36, Vas 2.93 ft³, Xmax 0.62″, Sd 76 in².
What is the Elemental Designs e12K (2003) mounting depth?
Mounting depth is 5 7/8″, cutout diameter 11 1/8″. The inside depth of the box must exceed the mounting depth by at least 1″.
How much power does the Elemental Designs e12K (2003) handle and how do I wire it?
RMS power rating: 400 W. Wiring for several subs and amp power — in the wiring calculator.