Earthquake Sound SWS-8X Shallow Woofer System Subwoofer-Set of 1 Black About this itemCar audio subwoofer with shallow 2-1/8 mounting depth for versatile placement; Compatible subwoofer replacement for BMW and Toyota Supra MKV.Impedance: 4 ohm.Power source type:Corded Electric.Speaker size:8 inchesInverted style cone design for maximum excursion in shallow mount applications; Protected by 3 US Patents150 WRMS (300 Watts MAX) with 4-Ohm impedanceSatisfying punchy bass from a small package - sealed enclosure is recommendedNOMEX/ROMEX spider assemblyEarthquake Sound Shallow Woofer System (SWS) SeriesEarthquake Sound Corporation is the original inventor of the Shallow Woofer System (SWS) that produces a lot of bass from a small space. They are a popular choice for replacing OEM car speakers with shallow mounting depths.In addition to OEM applications, the SWS series are the perfect bass solution for any car. Many factories are now using woofers in small areas. To improve your bass, simply replace the factory speakers with the SWS woofers no need for extensive modifications to accommodate large subwoofers.SpecificationsHigh-performance shallow subNOMEX/ROMEX spider assemblyAluminum bobbinHigh temperature voice coil with heat-sink attachmentInverted style cone design for maximum excursion in shallow mount applications