Also consider to what the connector is connected-ie binding posts.And "bind" the sound is what they do indeed do.Whenever I can I bypass those nasty things and solder directly .Think about it,amplifier speaker binding posts made of?, then speaker wire connector made of?,then speaker binding post made of? no wonder some systems sound so wrong, too many variables.You should be looking at continuity from source to speaker with as little mechanical terminations as possible.
