QED Reference XT400


QED Reference XT400 is QED's flagship X-TUBE™ speaker cable.

X-TUBE™ technology is a genuine breakthrough in loudspeaker cable design. This cable range delivers many of the attributes of our world renowned Genesis Silver Spiral cable - superb transparency, dynamics and control - in a more compact cable format. XT-400 is designed to be the natural upgrade for anyone using QED’s Silver Anniversary XT speaker cable or those simply wanting the best performance for their hi-fi or home theatre. The construction of this is uniquely QED: 

Silver Plated Oxygen Free Copper tubular conductor geometry. For use in the finest hi-fi and home theatre systems.This design delivers a massive cross-sectional area using X-Tube technology to eliminate the skin effect whilst maintaining a user friendly “figure of 8” geometry. This is QED’s ultimate affordable upgrade for high end systems.

QED XT400 'Airloc' termination tutorial: http://www.qed.co.uk/qed-tv/qed-x-tube-400-airloc-termination-tutorial.htm


  • Silver plated 99.999% Oxygen Free Copper conductors
  • X-Tube™ Technology
  • Jacket OD - 6.00mm
  • Cross-sectional area - 4.00mm²
  • Loop resistance - 8m ohm/m
  • Capacitance - 43pF/m
  • Inductance - 0.50ohmH/m
  • Dissipation factor - 0.0400
  • Recommended for all high end installations

Awards and Reviews

WHIFI 5 Star,