Spades or bananas

It doesn't need to be a good mechanical connection, it needs to be a good ELECTRICAL connection; there's a difference. You're flowing electrons, not water (although there were some idiotic water-filled cables on the market a few years back, maybe they need to be spade-terminated!). A large percentage of removable electrical connections are made with spring pressure, not screws. And the big advantage of spring-pressure contacts (including WBT bananas and the Neutrik Speakon connectors) is that they maintain consistent high contact pressure over time, and don't loosen due to thermal cycling, which is exactly what's needed for a good, reliable electrical connection. It's better than a thumb-tightened spade, and not any better or worse than a wrench-tightened spade, just different.

My bananas dont 'fall out' they are nice and snug.Im done with spades.Too much trouble.

If the connection is vibrating it has to be generating spurious noise and resonance. Look at some of the new ideas from Sonoran Audio.They now use a micro bearing insulator around the final dilectric of their new series of power cords, innerconnects, and speaker cables.I recently upgraded from their previous best to the new Plateau Series.The only difference is the micro-bearing insulator.WOW, much quieter more dynamic and improved separation .The first cable I swapped out was the co-axial digital.This new Plateau Series Cable lowered the noise floor and brought the soundstage to life. Only thing I can figure is that with the addition of the micro-bearing shield, noise is reduced to new lower levels, allowing more of music to be reproduced.