VM Audio EXW15
15″ subwoofer · dual 4 Ω · 1,300 W RMS
| Source | web.archive.org, vminnovations.com · manufacturer data |
|---|---|
| Checked against source | October 2026 |
| Thiele/Small parameters | not in the spec sheet: Xmax — typical value for the size used |
| Mounting dimensions | 2 of 4 — missing: frame outer diameter, magnet diameter; the designer will use an estimate |
Recommended box
For a sedan, one sub, 1,300 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) | Boomy, with a bump · 1.21 |
|---|---|
| Fc | 49 Hz |
| F3 (−3 dB, no cabin gain) | 37 Hz |
| Example box (outside) | 31 1/2″ × 17 5/16″ × 11 3/4″ |
Ported
deeper, louder| Tuning (Fb) | 34 Hz |
|---|---|
| Port | slot 2 3/16 × 15 7/8″, 23 11/16″ long |
| Port velocity at 1,300 W | 63 ft/s |
| F3 (−3 dB, no cabin gain) | 33 Hz |
| Example box (outside) | 31 1/2″ × 17 5/16″ × 14 1/4″ |
Deeper: 4.56 ft³ (129 L) tuned to 36 Hz, 31 1/2″ × 17 5/16″ × 20 13/16″ 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 4 Ω |
| RMS power | 1,300 W |
| Fs | 32 Hz |
| Qts | 0.80 |
| Qes | 1 |
| Qms | 4 |
| Vas | 3.50 ft³ |
| Re (one coil) | 3.6 Ω |
|---|---|
| Sd | 118 in² |
| Xmax | ≈ 0.39″ |
| Mms | 205 g calc. |
| BL | 12.2 T·m calc. |
| EBP | 32 — suits sealed calc. |
| Sensitivity, 1 W / 1 m | 87.1 dB calc. |
Mounting dimensions
| Cutout diameter | 13 9/16″ |
|---|---|
| Mounting depth | 7 1/4″ |
Cone area (Sd) calculated from Fs, Vas and Mms: 118 in².
Judging by its value, the published Re is for both coils in series — converted to per coil.
“≈” 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/20150909044835/http://www.vmaudio.com/?product=exw15
- vminnovations.com/products/2-vm-audio-exw15-elux-15-competition-car-power-subwoo
Other VM Audio 15″ models
- VM Audio ECW150 15″ · dual 4 Ω
Similar 15″ subwoofers from other brands
Close in Fs, Qts and Vas — a box of similar volume will suit them.
- Machete MS-15 D4 2.83 ft³ sealed · 3.00 ft³ ported
- Deaf Bonce Hannibal HSS-3215 D2 2.83 ft³ sealed · 2.37 ft³ ported
- Sky High Car Audio FEX-15 D2 2.93 ft³ sealed · 3.04 ft³ ported
- Hertz Energy ES 380.5 (SVC 4 ohm) 2.86 ft³ sealed · 2.79 ft³ ported
- Quantum Audio Q2500/15D 2.83 ft³ sealed · 2.86 ft³ ported
- Machete MS-15 D2 2.83 ft³ sealed · 2.75 ft³ ported
FAQ
What box does the VM Audio EXW15 need?
Recommended net volume: 2.68 ft³ sealed, 2.79 ft³ ported tuned to 34 Hz — for one sub in a sedan at 1,300 W. Fit the box to your space and amp in the free calculator, with plans and a cut sheet.
What are the VM Audio EXW15 Thiele/Small specs?
Fs 32 Hz, Qts 0.80, Vas 3.50 ft³, Sd 118 in².
What is the VM Audio EXW15 mounting depth?
Mounting depth is 7 1/4″, cutout diameter 13 9/16″. The inside depth of the box must exceed the mounting depth by at least 1″.
How much power does the VM Audio EXW15 handle and how do I wire it?
RMS power rating: 1,300 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.