Features:

Alpine Type-R subwoofers play loud, clean, and long. The Type-R's are designed from HAMR Engineering, Alpine's exclusive subwoofer solution for cooler operation, longer life, and tight, accurate bass. The main philosophy behind HAMR Engineering is to ensure the ultimate sound quality and performance through the use of highly advanced materials and patented design technologies such as magnetic, structural finite element analysis, and a 3rd generation CRC motor structure. The Type-R subwoofer features an ultra long linear excursion for dynamic, realistic sound. Exclusive cooling technologies contribute to huge power handling capabilities. You can depend on the Type-R to compliment your system with deep, accurate bass.

• 2000 Watt Peak Power Handling
• Dual 2-ohm voice coils
• 18-400 Hz Frequency Response
• 87 dB Sensitivity
  
  Impedance (ohms)     2
  Woofer Size (inches)     15 inch
  Voice Coil     Dual
  Rated Power RMS (watts)     501 to 999
  Shallow Mount     No
  Size (inches)     15
  Impedance (ohms)     2
  Dual Voice Coil     Yes
  Sensitivity (dB)     87
  Frequency Response (hz)     18-400
  RMS Power Handling (watts)     400-750
  Max Power Handling (watts)     750-2000
  Cone Material     Kevlar Reinforced Pulp
  Surround Material     Santoprene Rubber
  Basket Type     Cast Aluminum
  Recommended Sealed Box Volume (cu. ft.)     1.3-2.5
  Recommended Ported Box Volume (cu. ft.)     1.5-3.0
  Free-Air Capable     No
  Magnet Weight (oz)     155
  Top Mount Depth (inches)     9-3/16
  Cutout Diameter or Length (inches)     13-13/16
  Vas (liters)     100
  Fs (hz)     22
  Qts     0.41
  Xmax (millimeters)     20.7
  Weight (lbs)     44
  Warranty (parts and labor)     1 Year