Elemental Designs e15kd4
15″ subwoofer · DVC
| 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 |
- The spec sheet's Qts 0.49 doesn't match its Qes and Qms (they give 0.59).
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 · 0.92 |
|---|---|
| Fc | 39 Hz |
| F3 (−3 dB, no cabin gain) | 34 Hz |
| Example box (outside) | 31 1/2″ × 18 1/8″ × 12 1/8″ |
Ported
deeper, louder| Tuning (Fb) | 30 Hz |
|---|---|
| Port | slot 1 9/16 × 16 11/16″, 18 13/16″ long |
| Port velocity at 300 W | 50 ft/s |
| F3 (−3 dB, no cabin gain) | 28 Hz |
| Example box (outside) | 31 1/2″ × 18 1/8″ × 15″ |
Deeper: 4.94 ft³ (140 L) tuned to 29 Hz, 31 1/2″ × 18 1/8″ × 20 3/16″ 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 | DVC |
| RMS power | — |
| Fs | 25 Hz |
| Qts | 0.59 |
| Qes | 0.65 |
| Qms | 6 |
| Vas | 4.24 ft³ |
| Re (one coil) | 0.88 Ω |
|---|---|
| Sd | 127.9 in² |
| Xmax | 0.56″ |
| Vd | 71 in³ calc. |
| Mms | 326 g calc. |
| BL | 8.3 T·m calc. |
| EBP | 38 — suits sealed calc. |
| Sensitivity, 1 W / 1 m | 86.6 dB calc. |
Mounting dimensions
| Cutout diameter | 14″ |
|---|---|
| Mounting depth | 7 3/16″ |
“≈” 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/20021022064831/http://www.edesignaudio.com/ep/kts.htm
- web.archive.org/web/20040630111948/http://www.edesignaudio.com/pdf/02kts.pdf
- web.archive.org/web/20041116132914/http://www.edesignaudio.com/archive/2002KSeri
Other Elemental Designs 15″ models
- Elemental Designs 15A.22 15″ · dual 2 Ω
- Elemental Designs 16Ov.2 15″ · dual 2 Ω
- Elemental Designs E15a 15″ · DVC
- Elemental Designs e15K (2003) 15″ · DVC
- Elemental Designs E15o 15″ · DVC
- Elemental Designs e15SP4 15″
Similar 15″ subwoofers from other brands
Close in Fs, Qts and Vas — a box of similar volume will suit them.
- Audiobahn ALUM15N 3.00 ft³ sealed · 3.67 ft³ ported
- Audiobahn ALUM15Q 3.00 ft³ sealed · 3.67 ft³ ported
- Kicker Solo-Baric L7R 15" 2-Ohm DVC (45L7R152) 3.71 ft³ sealed · 4.52 ft³ ported
- Hifonics ZXS15D2 2.93 ft³ sealed · 3.39 ft³ ported
- MTX Audio 7515-22 3.18 ft³ sealed · 3.00 ft³ ported
- PSI Platform 2 15 D2 2.93 ft³ sealed · 3.57 ft³ ported
FAQ
What box does the Elemental Designs e15kd4 need?
Recommended net volume: 2.93 ft³ sealed, 3.39 ft³ ported tuned to 30 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 Elemental Designs e15kd4 Thiele/Small specs?
Fs 25 Hz, Qts 0.59, Vas 4.24 ft³, Xmax 0.56″, Sd 127.9 in².
What is the Elemental Designs e15kd4 mounting depth?
Mounting depth is 7 3/16″, cutout diameter 14″. The inside depth of the box must exceed the mounting depth by at least 1″.