Home Slickdeals Ultrasone HFI-580 S-Logic Surround Sound Professional Headphones $79 or Ultrasone HFI-780 $99... Slickdeals Ultrasone HFI-580 S-Logic Surround Sound Professional Headphones $79 or Ultrasone HFI-780 $99 ac fs @ bd By ARCOM - 21 September 2017 293 0 SHARE Facebook Twitter Go to the deal page: Ultrasone HFI-580 S-Logic Surround Sound Professional Headphones $79 or Ultrasone HFI-780 $99 ac fs @ bd