I've got a Denon 1507 amp and have always connected my speaker cable by just twisting the exposed copper and inserting into the connectors at both speaker and amp end. I'm looking to buy some new speaker cable soon (probably QED Silver Anniversary XT) so i was wondering whether my amp will accept 4mm banana plug terminations. On the end of the Denon speaker connectors are removable plastic plugs which i'm assuming can be taken out if 4mm plugs are going to be used, but i'd like someone to confirm for me. The Denon manual doesn't mention the use of plugs just the method i currently use. Thanks