QED Genesis Silver Spiral Speaker Cable – Per Metre

Description

QED’s award-winning flagship Genesis Silver Spiral speaker cable is the result of over four decades of R&D. Silver Spiral’s exceptionally low resistance allows amplifiers to exert outstanding grip and control over the speakers they’re driving, especially at low frequencies.

Construction

More than just another speaker cable, it’s a high performance audio component representing the culmination of QED’s intense scientific research and development, known as the Genesis Report, over the past 40 years. Genesis Silver Spiral is a speaker cable with a large cross-sectional area which makes for a very low resistance. This means that the voltage drop across the cable when in use will be so small that it will not have an audible effect on the frequency response of the loudspeakers – unlike cables with a much higher resistance. In addition this has the effect of helping to maintain the damping factor of the amplifier when compared to that measured using cables with a smaller cross-sectional area and therefore higher resistance.

Distortion Control

Damping factor is a measure of the amplifier’s ability to accurately control speaker excursions – especially at their resonant frequency. If it is not allowed to do this effectively, distortion can be introduced into the program material. Genesis speaker cable allows the amplifier to accelerate and decelerate the speaker accurately – reducing distortion. Thus low-frequency information in the program material is conveyed accurately to the speakers and bass notes sound tight and punchy with no tendency to become “boomy”.

Cable Impedance

Genesis is able to effectively overcome the skin effect that occurs at high frequencies in cables of large cross-sectional area. This is the effect that causes high frequencies to be carried more effectively in the outer portion of the conductor thus effectively increasing the cable impedance at those frequencies. By having many smaller individually insulated conductors to add up to a large cross-sectional area, more of the available conductor area is utilised at high frequencies.

At the same time, each individual strand is silver plated to ensure that the resistance at the surface of each conductor is as low as possible. It is desirable to keep the capacitance of a speaker cable as low as possible as a high capacitance cable can cause instability in some amplifiers and the Genesis cable achieves this by using insulating materials with very low dielectric constants. Thus for any ordinary speaker cable with the same conductor spacing and cross-sectional area Genesis Silver Spiral will be found to have a significantly lower capacitance per meter.

Aircore Technology

QED cables above 2.5 mm2 cross-sectional area utilise air core technology to obviate the skin effect by bundling several separately insulated smaller cores together to make up a larger CSA. If these conductors are arranged around a hollow central core of polyethene the self-inductance exhibited by the cable can be reduced to around half that predicted by calculation.

Having a large cross-sectional area and reduced resistance would normally give rise to a corresponding increase in loop inductance (and therefore inductive reactance) due to the conductors being more widely spaced. Having a high self-inductance is not usually desirable in a speaker cable as it can affect high-frequency performance and introduce an attendant phase shift at those frequencies.

Please Note

Price is per metre. Enter the total number of metres needed in the quantity box and click BUY. This is supplied unterminated (bare wire).

Termination Service

You can also order QED Termination Service, for which we use high-quality QED Airloc plugs as shown in the photo above. (If you order 4m, and order termination, we will terminate 2 x 2m lengths, if you order 10m, we will terminate 2 x 5m lengths, and so on). If you have several cables you need to be terminated or if you prefer to discuss termination on the phone, you can call to order on 0121 224 7300.