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Binding posts tightening physics and drastic change

Hello to you guys. I just do not get it from scientific point of view. Here’s the case. As a Hi Fi man since many years I came to buy a pair of great monitor ( passive ) speakers ( the company has in this case nothing to do I guess but this is a second pair of the same speakers I had before ) I just happened to spend hours and hours to get the right position and sound ( as all monitors are very susceptible to set ups and so on ) and now this - as a purist I always tighten but not overtighten binding posts with banana connectors - yesterday I do not know why I made loose a bit all the screws on 4 binding posts so that they are not so strongly tightened up - and now the sound finally came to life and sounds much better with a bit more bass - I am no kidding in this case as I am an analytical listener. Please explain what the hell ? Almost anyone says that tightening should improve the sound - here it is quite opposite. Regards.
P.S. The more to add that there are no cable jumpers but metal (copper) links.
audiodav
erik_squires
16,063 posts
 
It could just be that all the turning has cleaned off some contacts somewhere.

I do find that the harder the materials used in the binding posts and spades, the worse a connection you get. Tightening them down doesn't seem to help. Softer materials in the screw threads, spades or binding posts tend to work better.
Otherwise, it is possible there was some physical resonance happening that went away with the loose screws.

Best,

E
audiodav OP
12 posts
 
@glennewdick and @erik Thanks for replies but I can assure you if that was the case I would not start this thread. I plugged my cables thousands of times since, cleaned the posts and always made sure from time to time that the posts were solid ( but not overtightened ) for such replies I write in advance - no such things like neglecting something. Not touching for ages etc, please calculate this out.
audiodav OP
12 posts
 
@erik " Tightening them down doesn't seem to help. Softer materials in the screw threads, spades or binding posts tend to work better.
Otherwise, it is possible there was some physical resonance happening that went away with the loose screws. " Yes - thank you that can be the cause indeed !
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