Sundown Audio - SDv4 8"

Sundown Audio - SDv4 8"The SD 4 series truly is a world class sound quality woofer with low mounting depth, small box requirements, yet extraordinarily high power handling. It's the ideal choice for anyone seeking a high quality, low mounting depth subwoofer that performs hammers in small enclosures. With enhanced mechanical durability and superb sound quality, you get the perfect marriage of form and function. RMS 400 watts Dual 2 voice coils Optimized for small, sealed

• • The SD-4 series truly is a world-class sound quality woofer with low mounting depth, small box requirements, yet extraordinarily high power handling. It's the ideal choice for anyone seeking a high-quality, low-mounting-depth subwoofer that performs hammers in small enclosures. With enhanced mechanical durability and superb sound quality, you get the perfect marriage of form and function.
  • RMS 400 watts
  • Dual 2 voice coils
  • Optimized for small, sealed enclosures
  • Lightweight Neodymium motor
  • Computer-optimized foam “w” surround
  • Two-inch 8-layer copper voice coil
  • Large aluminum Faraday ring for smooth acoustic response
  • Patented high strength cast aluminum frame
  • Low distortion motor construction
  • High-temperature voice coil wire
  • Spring-loaded terminals
  • Stitched-on tinsel lead wires
  
  

  Dual-2-Ohm T/S Specs
  RMS Power (D2)	400
  Re-Ohms (D2)	4.2
  FS-Hz (D2)	35.6841
  Vas-L (D2)	12.16
  Qes (D2)	0.5783
  Qms (D2)	5.7988
  Qts (D2)	0.5259
  Le-mH (D2)	4.4242
  BL-NA (D2)	13.17
  Mms-Grams (D2)	106.4747
  Cms-uM/N (D2)	186.8295
  Sensitivity-dB @ 1w/1m (D2)	81.55
  Xmax (D2)	14.5mm

  Subwoofer Measurements
  Documentation	Physical Dimensions
  Displacement (Inches)	0.07 cu ft
  Depth (Inches)	4.5"
  Cutout (Inches)	6.750"
  Motor Diameter (Inches)	4.52
  Ported Enclosure Specs
  Ported Enclosure Size	Not Recommended
  Recommended Port Tuning	35hz
  Sealed Enclosure Specs
  Sealed Enclosure Size	0.33 - 0.5 cu ft
  4th Order Enclosure Specs
  4th Order Sealed Side	.375cu ft
  4th Order Ported Side	1.5cu ft
  4th Order Port Area	15sq in
  4th Order Port Length	6"