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With the TS-W311D4, engineers re-designed the spider assembly to allow the subwoofer to produce more accurate and rich bass. Taking notes from our high-end SPL competition and Reference Series speakers, the spider is now assembled onto the spider holder rather than directly on to the basket. Since the cone is also assembled onto the basket which can cause additional vibration, the independent structure of the spider holder helps minimize vibration coming from the cone. This improves playback response, sound outline, and provides high linearity.


    • Size12"

    • Max. Music Power (Nominal)1,400W (400W)

    • Cone CompositionIMPP Composite Cone

    • Surround CompositionDual Layer Fiber Reinforced Elastic Polymer Surround

    • Impedance4 Ohms x 2

    • Frequency Response20Hz - 125Hz (-20 dB)

    • Sensitivity (IN CAR, INPUT: 1W)95 dB

    • Warranty1 Year


    • Mounting Depth5.9 in (151 mm)

    • Cut-out Diameter11.1 in (283 mm)

    • Equivalent Compliance (Vas)1.15 cu ft (32.7 L)

    • Free Air Resonance (Fs)43 Hz

    • Total Speaker "Q" (Qts)1.05

    • Linear Excursion (Xmax)0.42 in (10.8 mm)


    • Recommended Sealed Box Volume1.25 cu ft (35.4 liters)

    • Recommended Ported Box Volume1.5 cu ft (42.5 liters)

    • Port Diameter3 in (76 mm)

    • Port Length6.5 in (165 mm)

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