These custom designed premium Subwoofer enclosures are perfect for the MTX Audio range of Subwoofers, from RoadThunder to the TX8 Series these boxes are ideal, we recommend a custom enclosure for the RFL Competition Subwoofers if you're powering them with over 2000W RMS each. These enclosures feature a very wide output bandwidth, allowing you to play low frequency bass as well as high frequency bass with snappy response. 

Features :

  • High output MTX Sledgehammer Enclosure
  • Satin black front
  • Unique slot port design
  • Designed to deliver loud and accurate bass
  • Designed to fit any MTX 12" subwoofer


  • Dimensions: 508x364x432mm (398mm at the top)
  • Internal volume: 75 liters
  • Port area: 328x44mm
  • Port depth: 288mm
  • Tuning frequency: 36-40Hz
  • Subwoofer cutout: 232mm
  • Back wall angle: 80°