30cm 4Ω C-Type Dual Voice Coil Subwoofer (1400W)
TS-W308D4
More bass. More power. Greater flexibility.
Get powerful, punchy base in your car – from the pedigree of world record-breaking subs.. The TS-W308D4 sub features a combined Aramid and Basalt fibre cone, which makes the body ultra-rigid, yet lightweight, giving you low distortion and powerful bass at high sound press levels.
Greater flexibility is possible, too. With a 4Ω dual voice coil, you can opt for a 2Ω or 8Ω set-up (provided that there is correct power matching between the sub and your amp).
Wiring and installation is made easier with one-sided terminals. And you can enhance the look (and protection) of your sub with the addition of an optional 3-spoke grill.
The TS-W308D4 is recommended for enclosed use and is also available as a 2Ω dual voice coil model.

Specifications
| Features | TS-W308D4 |
|---|---|
| Maximum output power | 1.400 Watt |
| Impedance | 4Ω |
| Frequency response | 20 - 180 Hz |
| Lowest resonance frequency (Hz) | 34,5 Hz |
| Sensitivity (1W/1m) | 92 dB |
| Woofer size (cm) | 30 cm |
| Woofer material | Interlaced Basalt / Aramid Fibre Reinforced IMPP Composite Cone |
| Dual 4Ω voice coils: 2 or 8Ω | Yes |
| Magnets | Double-stacked, high power |
| Thiele/Small Parameters | TS-W308D4 |
| Recom. Enclosure [l] | 35,4 |
| Features | TS-W308D4 |
| Nominal output power | 400 Watt |
| Voice Coil bobbin type | Phenol resin coated glass cloth bobbin |
| Pole Yoke Type | Extended and Vented pole yoke |
| Terminals | Push-type |
| Recommended sealed enclosure (Litres) | 24,1 - 49,5 litres |
| Surround | 3-Layer Fiber Woven Radial Surround |
| Thiele/Small Parameters | TS-W308D4 |
| Nom. Dia.(In) | 12 |
| Qts | 0,62 |
| Qms | 16,43 |
| Qes | 0,65 |
| Fs [Hz] | 34,5 |
| Vas [l] | 34,68 |
| Vas [ft3] | 1,22 |
| Vd [l] | 0,474 |
| Vd [ft3] | 0,01672 |
| Sd [m2] | 0,04597 |
| Sd [ft2] | 0,495 |
| Revc [Ω] | DUAL3.2 |
| Levc [mH] (2000Hz) | 3.76 (8Ω) 1.30 (2Ω) |
| Xmax [mm] | 10,3 |
| Xmax [in] | 0,41 |
| Zmax [Ω] | 177.44 (8Ω) 45.58 (2Ω) |
| BI [Tm] | 20.37 (8Ω) 10.14 (2Ω) |
| Rms[Ns/m] | 2,426 |
| Mms [g] | 184,17 |
| Cms [m/N] | 0,00012 |
| Mg.Wt.[g] | 2350 |
| Flux Density [Gauss] | 7400 |
| Hag [mm] | 10 |
| Hag [In] | 0,39 |
| Hvc [mm] | 30,6 |
| Hvc [In] | 1,20 |
| VC.Diameter [mm] | 55 |
| Eff [%] | 0,21 |
| S.P.L. [dB] | 92,0 |
| R.M.S.Power [W] | 400 |
| M.M.P. [W] | 1400 |
| Sp. Displacement [l] | 2,16 |
| Sp. Displacement [ft3] | 0,076 |
| Recom. Enclosure [ft3] | 1,25 |
| F0 (in Cabinet) | 48,5 |
| Q0 (in Cabinet) | 0,872 |
