13.5-inch (345 mm) Subwoofer Driver, 4 ?

Key Features and Benefits:

• Dynamic Motor Analysis
  JL Audio's Dynamic Motor Analysis system is a powerful suite of FEA-based modeling systems. This leads to vastly reduced distortion and faithfully reproduced transients... or put simply: tight, clean, articulate bass.
• Floating cone attach method
  This assembly technique ensures proper surround geometry in the assembled speaker for better excursion control and dynamic voice coil alignment.
• Tab-ear frame design
  This frame design feature facilitates mounting the subwoofer driver in tight spaces.
• Concentric Tube Suspension
  The Concentric Tube Suspension technology delivers unprecedented excursion in a low-profile woofer.