Resistance
The direct-current resistance of a speaker cable’s conductor or complete go-and-return path, stated for a defined length.
Cable resistance opposes current flow and causes some amplifier output to be lost in the cable. It is measured in ohms (Ω) or milliohms (mΩ); 1,000 mΩ equals 1 Ω. Longer lengths of the same cable have greater resistance.
Resistance — Speaker Cable
For a speaker cable, use the complete outward-and-return loop when assessing the connection. If a figure is per conductor per metre, two equal conductors each three metres long contribute six metres of conductor resistance. A loop figure already includes both paths, so do not double it again.
Compare equivalent lengths and bases: per metre, foot or kilometre is not the total for a finished cable. Lower loop resistance reduces cable losses, especially with lower-impedance speakers. Keep connector contact resistance and characteristic impedance separate; neither is a substitute for this conductor-resistance figure.