Edge EDS18D1-E7
18″ subwoofer · dual 1 Ω · 2,000 W RMS
Fs 33.4 HzQts 0.24Vas 1.66 ft³
The published specs don’t add up:
- Fs, Vas and Sd don't match the moving mass of 455.6 g (they give 919 g) — one of the spec sheet values is probably wrong.
Recommended box
For a sedan, one sub, 2,000 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
| Net volume | 1.62 ft³ (46 L) |
|---|---|
| Qtc | 0.35 |
| Fc | 48 Hz |
| F3 (−3 dB, no cabin gain) | 123 Hz |
| Example box (outside) | 19 11/16″ × 19 11/16″ × 11 5/16″ |
Ported
| Net volume | 3.43 ft³ (97 L) |
|---|---|
| Tuning (Fb) | 26 Hz |
| Port | slot 2 3/4 × 19 1/16″, 54 5/8″ long |
| Port velocity at 2,000 W | 83 ft/s |
| F3 (−3 dB, no cabin gain) | 114 Hz |
| Example box (outside) | 31 1/2″ × 20 1/2″ × 18 5/8″ |
Thiele/Small parameters
| Fs | 33.4 Hz |
|---|---|
| Qts | 0.24 |
| Qes | 0.26 |
| Qms | 3.73 |
| Vas | 1.66 ft³ |
| Re (one coil) | 1 Ω |
| Sd | 179.8 in² |
| Xmax | ≈ 0.39″ |
| Mms | 919 g calc. |
| BL | 27.2 T·m calc. |
| EBP | 128 — suits ported calc. |
| Sensitivity, 1 W / 1 m | 90.3 dB calc. |
General
| Size | 18″ |
|---|---|
| Voice coils | dual 1 Ω |
| RMS power | 2,000 W |
Mounting dimensions
| Cutout diameter | ≈ 16 9/16″ |
|---|---|
| Mounting depth | ≈ 8 1/4″ |
“≈” 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
Other Edge 18″ models
- Edge EDX18D1-E7 18″ · dual 1 Ω
- Edge EDX18D1SPL-E7 18″ · dual 1 Ω