Internal chip amp wires

[lineup]

..... what kind of wire should actually carry the audio signals.input/output?

- for the internal input signals
you can use the same as external stereo cable you have to input RCA jacks
= shielded coaxial signal cable

- for the output of amp to the loudspeakers jacks
you can use solid copper wire, enough thick to carry large currents
maybe 2-4 square mm area
or
you can use short lenghts of your normal loudspeaker cable


- it is prefered always use as short as possible wires
there is no exception from this rule, in electronics