Pioneer 12", Single 4 Ohm talspole,

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More bass. More power.
TS-W series subs combine superior sound, design and technology.
All TS-W series subwoofers are designed to produce high-quality sound. They are equipped with a fully enclosed basket, which suppresses repulsion efficiently, ensuring accurate, clear and rhythmical bass. Each sub also comes with advanced technologies, such as a Pioneer patented IMPP composite cone, a rigid 3D-shaped cone design, and large double stacked magnets. On top of that, these TS-W series offer easy installation in many different cars.
TS-W311S4
Get powerful, punchy bass in your car from the pedigree of world record-breaking subs. The TS-W311S4 delivers up to 1400 Watts and is suitable for enclosed use.

Full specifications

Main Features

Boxed Subwoofer
Impedance	4 Ω
Frequency response	20 - 125
Sensitivity	95 dB
Lowest resonance frequency	42 Hz
Maximum power input	1400 W
Nominal output power	400 W
Woofer material	IMPP Composite Cone
Voice Coil type	Copper, 4-layer
Voice Coil bobbin type	Aluminium
Pole Yoke Type	2
Terminals	Push-type
Dimensions	326,6 x 168,5 mm
Magnets	Ferrite (double)
Surround	Dual Layer, Fiber Reinforced Elastic Polymer Surround
Screw Terminals	8
Weight	6.1 kg kg
Cut-out Hole	283 mm
Mounting Depth	151 mm
Recom. Enclosure [l]	35.38
Recom. Enclosure [ft³]	1.25
Size	30 cm

Thiele/Small Parameters

Nom. Dia.(In)	30
Qts	0.79
Qms	14.96
Qes	0.84
Fs [Hz]	42
Vas [l]	37.5
Vas [ft³]	1.32
Vd [l]	0.42
Vd [ft³]	1.32
Sd [m²]	0.0147
Sd [ft²]	0.052
Revc [O]	3
Levc [mH] (2000Hz)	2.87
Xmax [mm]	8
Xmax [in]	0.3
Zmax [O]	47.27
BI [Tm]	13
Rms[Ns/m]	2.88
Mms [g]	164
Cms [m/N]	8,7 x 10-5
Mg.Wt.[g]	2100
Flux Density [Gauss]	6926
Hag [mm]	10
Hag [In]	0.39
Hvc [mm]	26
Hvc [In]	1.02
VC.Diameter [mm]	48
Eff [%]	0.29
S.P.L. [dB]	95
R.M.S.Power [W]	400
M.M.P. [W]	1400
Sp. Displacement [l]	1.67
Sp. Displacement [ft³]	0.059
F₀ (in Cabinet)	55.7
Q₀ (in Cabinet)	1.09