QED Performance XT25 Speaker Cable
With XT25 we tackle the proximity effect and the skin effect by combining our existing Aircore™ and X-Tube™ Technologies into a new X-Tube™ variation. By forming the conductors into a tube-like shape with a hollow centre, current densities at higher frequencies are maintained because the electric field which contributes towards the skin effect acts towards the centre of the conductor from where the conductive material has been removed.
X-Tube™ technology first came to prominence in 2005 with the launch of the world renowned Silver Anniversary XT, the most highly regarded mid-range cable in the world, winning the What Hi-Fi Product of the Year three years in a row. These design principles also grace the multiple award winning XT40 speaker cable and XT25.
As frequency increases, electrons flow more and more towards the periphery of a conductor so that if the frequency is high enough only a very thin layer (or skin) on the outside of the conductor is used. This “skin depth” varies for different materials at a fixed frequency and in copper it means that if a conductor has larger than 0.66 mm² cross-sectional area not all of that area is available for an analogue music signal to use. In SAXT the “skin effect” problem was effectively eliminated by the use of X-Tube™ Technology which works by placing all of the conducting material around a central hollow insulating rod. However, for a.c. signals, changing magnetic fields generated by the flow of current set up eddy currents in nearby conductors which force current to flow only in areas furthest away from conductors carrying current in the same direction and vice versa.
2.5 mm2 WIRE GAUGE
14 AWG JACKET OUTSIDE DIAMETER
3.96 mm LOOP RESISTANCE
13.4 mΩ/m CAPACITANCE
35.0 pF/m LOOP INDUCTANCE
0.52 μH/m DISSIPATION FACTOR
@ 10 kHz 0.0001 CONDUCTORS
10 x 19/0.13 mm INSULATION
LDPE jacket with 100% coverage of Aluminium Mylar tape wrap PLUGS AND SPADES
QED Airloc™ Forte banana plugs