Sundown Audio SDDN 18" D1 (3500-watt)

LIMITED EDITION - ONLY 500 UNITS TO EVER BE MADE.

** Subwoofer is Built to Order with an estimate of 3+ weeks to be completed**

• 3.3 inch coil. In comparison this coil is massive compared to the ZV6. ONLY AVAILABLE IN D1.
• 3500 watts RMS rating (highest in our current offerings)
• Over 50% more motor force than the ZV6
• Theoretical 2db increase in a swap from the ZV6 to these
• Recone parts will be readily available
• Motor itself weighs around 100lbs.
• 10 / 12 / 15 / 18 all available in D1 only.

• Buffer[1] Vas VCompleted: Mon Jun 26 15:27:02 2023
  Drive level 100.000% [3.531 mA]
  Sine,LoZP(LV/LA)->Vas,20 pts
  ;------------------------------------------------------------------
  Re = 2.0333 ohms
  Fs = 30.0404 Hz
  Zmax = 33.3616 ohms
  Qes = 0.3345
  Qms = 5.1537
  Qts = 0.3141
  Le = 4.2364 mH (at 1 kHz)
  Diam = 381.0000 mm ( 15.0000 in )
  Sd = 114009.1866 mm^2(176.7146 in^2)
  Vas = 72.2840 L ( 2.5527 ft^3)
  BL = 28.6825 N/A
  Mms = 717.0201 g
  Cms = 39.1469 uM/N
  Kms = 25544.7813 N/M
  Rms = 26.2601 R mechanical
  Efficiency = 0.5504 %
  Sensitivity= 89.4252 dB @1W/1m
  Sensitivity= 95.3740 dB @2.83Vrms/1m
  Krm = 11.343E-03 ohms Freq dependent resistance
  Erm = 857.762E-03 Rem=Krm*(2*pi*f)^Erm
  Kxm = 96.307E-03 Henries Freq dependent reactance
  Exm = 643.593E-03 Xem=Kxm*(2*pi*f)^Exm
  ;------------------------------------------------------------------
  Ftest = 26.264 Hz
  Ftest/Fms = 0.8743
  Test Mass used = 221.0000 g (Equal to 44.2 nickels)
  Test Mass (Ft=Fms*0.90) = 168.190 g (Add -52.810g for Ft=27.036)
  Test Mass (Ft=Fms*0.75) = 557.682 g (Add 336.682g for Ft=22.530)