Speaker terminal Loose

I’ve had exactly these problems, with Furutech. I’m sorry, Furutech kind of sucks in general for bananas. I’ve also found them super easy to deform.


WBT’s bananas are slightly tighter fitting, and if you can avoid Rhodium you’ll have a better connection. Rhodium is beautiful and far too hard. Gold plated is going to be a better long term connection.  If you used the copper crimping sleeves, you'll find they slip right on.


Another alternative is the WBT spades. The built in spring loading makes them keep good contact even with very hard plugs like nickel plated.

Are your Furutech bananas the kind with the split hollow tube at the end?  If they are just get a small screwdriver and open them up a bit. 

Right. Pry them open for a snug fit.

This will work, for a while. Does nothing to address the fundamental problem, that banana connectors rely on the spring of the metal for contact. At best this means sacrificing sonic characteristics in order to get enough spring action. At worst it means losing all contact. Its just an awful design. Buying convenience over functionality never does work out as beautifully as you imagine, does it?

Live and learn. Next time, spades.

Millercarbon.   You are correct about sacrificing spring action and sonics.  Having a pure copper base is always better than less conductive brass.  But copper is soft and difficult to machine.  That is why you still see most "high end" speaker connections and RCAs made with some kind of plated brass.
The only banana plug I know of that is pure copper are the Furez connectors.   They are soft but they have a plastic insert that helps with holding them to shape.  They grip good but do need an occasional expanding when they are plugged in and out a number of times.  I have not noticed them losing their grip if they remain plugged in.
I do like spades.......just wish they would fit on all of my amps.