SD-18

• 18" high power woofer
• 600 watts RMS
• 30Hz-1.5kHz
• 4.5" voice coil
• 8 ohms
  

  Nominal Basket Diameter	18" / 460mm
  Impedance	8 ohms
  RMS Power Rating	800 Watts
  Program Power	1600 Watts
  Frequency Resp onse	30Hz - 1.5kHz
  Sensitivity (1W/1m)	98dB
  Voice Coil Diameter	4.5" / 114.3mm
  Voice Coil Material	Anodized CCAW+fiberglass
  Terminal Type	Gold Plated Push
  Bobbin Material	Fiberglass
  Basket	Cast Aluminum
  Cone Material	Paper
  Surround Material	Treated Cloth
  Magnet Material	Ferrite
  Net Weight	15.32 kg. / 33.7 lbs.
  MOUNTING INFORMATION
  Bolt Circle Diameter	17.72" / 450mm
  No. Of Mounting Holes	8
  THIELE-SMALL PARAMETERS
  Resonant Frequency (fs)	33 Hz
  Impedance (Re)	5.1 ohms
  Coil Inductance (Le)	1.95mH
  Mechanical Q (Qms)	7.11
  Electromagnetic Q (Qes)	.27
  Total Q (Qts)	.26
  Compliance Equivalent Vol. (Vas)	264.3 Liters/10.41cu. ft.
  Voice Coil Overhang (Xmax)	5.0mm
  BL Factor (BL)	35.8
  Surface Area of Cone (Sd)	.125m2
  Reference Efficiency	3.42%