Cerwin-Vega Mobile's VMAX subwoofers have been our most popular for over 10 years. There are many reasons why. VMAX subwoofers use low resonance heavy gauge cast aluminum frames. They have large 2.5� high power voice coils capable of 500 watts RMS power. All VMAX subwoofers use a mirror dual spider design with woven tinsil leads. VMAX subwoofers are available in dual 2 ohm and dual 4 ohm versions.