QED SIGNATURE AUDIO 40 1 mt

Cavo di interconnessione stereo phono-phono che utilizza due conduttori di diametro diverso per fornire un percorso alternativo ai segnali delle alte frequenze, nuova guaina in PVC che assorbe i disturbi delle alte frequenze, nuovo connettore QED ANALOC ™ dorato

Signature Audio 40

The groundbreaking Signature Audio 40 analogue audio interconnect celebrates QED's 40 years at the forefront of British designed audio cables

Signature Audio 40 is an entirely new design concept from QED laboratories. The cordage is designed primarily for low capacitance as this has been identified by QED as a significant factor leading to a high fidelity experience and makes for a tight sound retaining the rhythm of the original piece. Add our Complementary Conductor Technology^TM for high frequency detail and our Analoc Technology^TM to maximise signal integrity and the result is what we feel to be the most innovative interconnect ever made by QED. Please see our 'cables matter' section below for more in-depth information on this ground breaking design.

FEATURES AND BENEFITS

CABLES MATTER

upon more basic implementations of the original RCA plug. Unfortunately there are a few problems with the use of bulk brass, the first being its low conductivity compared to pure copper. Pure copper plugs would be prohibitively expensive and so are not used but if the high purity copper conductors were confined to just the pin section and the small contact areas required for the return ring then this would be economically viable.

QED's new Analoc™ plugs take advantage of this idea and provide a high purity copper connection without the use of bulky brass plug bodies. The pin section is made from a hollow tube of high purity copper and the ground return is reduced to just two of the normal six leaves. This has the dual effect of providing a low resistance path for the tiny signal currents flowing in line level unbalanced connections and cuts out the possibility of eddy currents forming in the large volume of the plug body which would otherwise form part of the return path for the signal. Eddy currents are swirling circular currents which build up in any conductor where there is a variable magnetic field acting on it such as when an a.c. signal is applied. Eddy currents flowing in a conductor of a given resistivity necessarily dissipate energy and this energy loss is proportional to the square of the diameter of the conductor - so the smaller this can be kept, the less the effect of eddy currents on the delicate audio signal. Add to this that due to self inductance eddy currents can persist for a short time after the field is removed and always create a field that opposes that which creates them, it can be seen that eliminating this phenomenon can lead to improved transmission of the audio signal - especially in the area of minute timing effects.

Eddy currents give rise to the skin effect wherein the current increasingly flows towards the outside of the conductor as frequency increases. By removing the central portion of the copper pin section we have reduced eddy currents here also and thus combated the skin effect and reduced self inductance in a similar way to that employed in our X-Tube™ speaker cables. Because the contact area of the outer ground ring has been reduced it is necessary to provide a very firm connection indeed and so all Analoc™ plugs have a locking feature built in so that as the barrel is screwed up tight, the clamping force is increased making for a super noise free and secure connection for life.

The high purity copper conductors featured in the Analoc range come with gold plating at Reference level and rhodium plating for the Signature plugs. This plating is there to maintain low contact resistance throughout the life of the product due to the stability and low reactivity of these metals. Although copper is the second best electrical conductor (behind silver) it does react with oxygen and can tarnish over time increasing the contact resistance and therefore increasing distortion of the original signal. Rhodium has the advantage for use as a plating material due to its superior hardness. QED Analoc comes as standard on the Audio 40 interconnect range and can be purchased separately to be included in custom cable projects.

Analoc™ Technology

QED ‘Analoc™ RCA plug which features high purity copper signal and ground connections in an insulated low eddy current brass body. The hollow central pin eliminates skin effect in the signal connection and the locking barrel design clamps the dual tombstone ground connection firmly to the RCA sockets