Sundown Audio U6.5" v.2 Subwoofer 400 watts 

• RMS 400 watts
• Dual 2 or 4 ohm voice coils
• Optimized for small ported enclosures
  
• Aluminum 1.75” voice coil former for superior heat dissipation
• High-temperature copper voice coil
• Double stitched surround
• Heavy-duty cast basket
• Spring-loaded terminals accept up to 8-gauge wire
• Stitched-on heavy-duty tinsel leads
• Solid pole with vent channels and aluminum shorting ring cap
• Rear gap-venting
• Top-Plate Cooling Channels

Perfect for high-power underseat enclosures and designed to be at home in the competition lanes or playing your favorite tunes, the U Series is the premier “standard suspension” woofer in the Sundown lineup. A double-stacked 9” wide ferrite magnet system is coupled to a thick top plate. A thick set of shorting rings are also used inside the magnets and on the pole cap, smoothing out frequency response while doubling as a heat sink and airflow guide. An all-new, substantially thicker custom aluminum frame was designed specifically for the U Series, and equipped with heat-dissipation ribs. The v.2 motor also features an extended pole piece to keep the coil controlled under high stress!