A balanced audio connection sends the same signal on two conductors, with the second conductor carrying an inverted copy. The receiving device subtracts the two, which cancels noise picked up identically on both wires and doubles the signal. This is why professional microphone and line-level runs use balanced wiring with XLR connectors.<\/p>\n
The cable itself supports this: a two-core construction with a shield. One core carries the positive (hot) signal, the other the negative (cold), and the shield \u2014 connected to pin 1 of the XLR \u2014 carries the ground and drains interference.<\/p>\n
Shielding wraps the signal cores in a conductive layer that blocks or drains electromagnetic interference. Two common approaches are:<\/p>\n
Many professional cables combine both: foil plus a dense copper braid. The LBSDMX audio signal cable series<\/a> uses this combination \u2014 PE insulation, foil and dense copper shielding \u2014 to protect balanced microphone and line-level signals.<\/p>\n The conductor size (in mm\u00b2) affects how much signal loss occurs over distance. For standard microphone runs, common sizes range from 2 \u00d7 0.25 mm\u00b2 for short leads and patch cables up to 2 \u00d7 0.50 mm\u00b2 for longer, more demanding runs.<\/p>\n In the LBSDMX microphone cable range, the braiding structure tells you the conductor configuration:<\/p>\nConductor Size and Cable Capacitance<\/h2>\n