Mains cables carry relatively high alternating currents that are induced into sound cables operating alongside them, regardless of if the sound cable is well screened. The longer the distance the cables run alongside one another, the higher the total amount of disturbance (usually hum) which will be induced in to the sign cable. Whenever sound and mains cables must get a get a cross, make an effort to arrange the crossing become at right perspectives, since this could be the angle of minimum coupling.
Q. Just how long can sound cables be ahead of the alert quality suffers?
This really is among those ‘how long is an item of sequence?’ questions as the solution depends upon both the cable kind as well as on the impedance associated with circuitry at either end. As a tremendously rule that is general high-impedance mics or feeds from high-impedance tool pickups really should not be more than around four to five metres, while the cable capacitance may cause the high frequencies become attenuated, but low-impedance balanced mic cables could be tens if not a huge selection of metres very long if the sending and getting products are made correctly as well as the supply impedance is extremely low.