Don't leave them hanging. Double them up and use them on the speaker binding posts. You'll benefit from all the conductors being connected.
Can I use just half the biwire?
Hiya, I have biwires I like. Can I use them on non-biwire speakers?
Meaning, the unused two leads are dangling unused (and not touching of course)?
Is this somehow bad for the amp?
Meaning, the unused two leads are dangling unused (and not touching of course)?
Is this somehow bad for the amp?