Kicx ZT-18V2 (1+1)
18″ subwoofer · dual 1 Ω · 1,250 W RMS
Fs 21 HzQts 0.43Vas 6.53 ft³
Recommended box
For a sedan, one sub, 1,250 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 | 2.65 ft³ (75 L) |
|---|---|
| Qtc | 0.80 |
| Fc | 39 Hz |
| F3 (−3 dB, no cabin gain) | 37 Hz |
| Example box (outside) | 18 1/2″ × 18 1/2″ × 18 3/4″ |
Ported
| Net volume | 7.17 ft³ (203 L) |
|---|---|
| Tuning (Fb) | 25 Hz |
| Port | slot 3 3/4 × 17 7/8″, 33 1/8″ long |
| Port velocity at 1,250 W | 64 ft/s |
| F3 (−3 dB, no cabin gain) | 23 Hz |
| Example box (outside) | 31 1/2″ × 19 5/16″ × 30 1/16″ |
Thiele/Small parameters
| Fs | 21 Hz |
|---|---|
| Qts | 0.43 |
| Qes | 0.47 |
| Qms | 4.89 |
| Vas | 6.53 ft³ |
| Re (one coil) | 0.9 Ω |
| Sd | 185.1 in² |
| Xmax | ≈ 0.39″ |
| Mms | 627 g calc. |
| BL | 12.6 T·m calc. |
| EBP | 45 — suits sealed calc. |
| Sensitivity, 1 W / 1 m | 87.6 dB calc. |
General
| Size | 18″ |
|---|---|
| Voice coils | dual 1 Ω |
| RMS power | 1,250 W |
Mounting dimensions
| Cutout diameter | 15 3/8″ |
|---|---|
| Mounting depth | 9 7/16″ |
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
Other Kicx 18″ models
- Kicx HeadShot DM18 (1+1) 18″ · dual 1 Ω
- Kicx HeadShot DM18 (2+2) 18″ · dual 2 Ω