Russell K Red 100 Precision Audio Loudspeaker System

The Red 100 was the first loudspeaker designed by Russel K. and has since then won the hears of many HiFi reviewers and customers.

Alan Sicrom of Hifi+ puts it like this: “I think the reason the Red 100 works so well is it combines the twin demands of both timbre and tempo exquisitely, highly recommended.”


  • Dimensions H- 400mm W-260mm D-270mm
  • Construction 16mm MDF all sides apart from front baffle which is 19mm.
  • Totally undamped cabinet
  • 2 acoustic loading bracing shelves with multiple apertures mounted above and below the woofer
  • Reflex port loading tuned to 35Hz

Drive Units

  • 6.5” Bass unit with impregnated paper cone and curved optimised acoustic profile
  • High power Ferrite magnet driving a 25mm voice coil with aluminium former and Faraday distortion cancelling copper ring
  • 25mm soft dome tweeter
  • Double Ferrite magnet system
  • Copper Clad Aluminium voice coil wire on a Fibreglass Former  and Faraday distortion cancelling copper ring


  • Drivers connected in positive phase, crossover frequency 2200Hz nominal 12 db/Oct
  • Bass Inductor “Enclosed Field Ferrite Core” Very low DCR nominal stray fields
  • Tweeter attenuation by misaligned Zobel network as opposed to conventional L-Pad
  • Both Drivers have only one component in the signal path
  • Phase optimised through the crossover region
  • In room frequency range 30Hz-20KHz