Speaker binding posts with plastic covers

If they just unscrew, then they are very very tight. I'll get some heavy gloves and try again. 

I sent an email to Krell yesterday. Their response: "They just unscrew." So I'll have to just unscrew them. I'll try some channel lock pliers. Do you think a blast of Deoxit might help loosen it? 

@elliottbnewcombjr 

Yes, you're right, I posted that photo of the 0765 because I thought it looked close enough. The amp literature doesn't say whether that is the exact connector Krell uses. 

The channel-lock pliers have set the binding posts free, hallelujah hallelujah! Thanks, guys!

@imhififan 

Yes, that is the amp exactly. 

@imhififan 

Thank you, thank you, for posting that diagram. That was exactly the thing confounding me most. The cap had distinct parts and I wasn't sure where I should be applying pressure and so didn't want to apply too much pressure anywhere. Even with the diagram I still needed the pliers but at least I had more confidence about what I was doing. 

@jetter 

Now that I see how they operate, I'm impressed. It's actually quite clever and secure. 

@jjss49 

It does make me wonder what we ever did without the internet. 🙂