Makes no difference. New or old wires. Break in is not needed for wires and for speakers we are talking may be a few hours if anything at all. My drivers are stress tested before installation - so break in is not needed at all.
If your speakers need a long break in then it suggests the drive motors are insufficient and the surround and spider compliance is way too high (bad design).
If your speakers need a long break in then it suggests the drive motors are insufficient and the surround and spider compliance is way too high (bad design).