Audio 40 - Q. Why are the conductors so small in your QED Audio 40 range?
Answer:
QED Audio 40 cables are designed primarily to have low capacitance, we have found that these sound the best for various technical
reasons. The larger the conductors the more difficult it is to keep the
capacitance low so, we have used the finest ones that we can, while
remembering that the cable has to carry a certain amount of current.
For
a line level interconnect the input impedance of the amplifier it is
connected to is relatively high. This means that very little current is
drawn by the input and therefore the cable carries very little current.
Typically, the current drawn by an input is just 0.2 mA which means a 1m
Audio 40 cable would drop just 44 uV (a 0.002 % loss). Because the
impedance of the input is linear, this has no effect on the fidelity of
the audio signal conveyed. High impedance inputs are susceptible to
noise however, which is why we concentrate most of our engineering on
protecting the signal voltage from outside influence; using a foil and
large cross-section braided shield which is part of the return path for
signal currents. This shield has a very large cross-section and it is
what helps reduce the loop resistance of the cable design.