History forgotten is history repeated.
There is no reason why Banana plugs can't be used as an acceptable interconnect for hooking up speakers.
Soldering is also an option I guess but not very practical either. Soldering can have problems too, if not done properly, you can create a cold solder joint which can be brittle and suffer poor connection mating and thus increase your resistance.
The old Banana plug vs. bare wire debate came about years ago when poor quality control was an issue in manufacturers assembling speakers with binding posts. They often had poor tolerances(wide variations) and used several suppliers and molds for making binding posts/banana plug which made it very difficult to match banana plugs to binding posts. Alot of time, it was a matter of trial and error before finding an adequate solution which in the end just meant that bare wires were just simpler to use. But hooking up bare wires after eating a bucket of KFC added its own issues...
LOL
Reputable speaker mfgs. recognized these issues and have since made improvements. There are always 'tolerance' factors but they should be minimal.
Sincerely, as long as you have a clean connector (no digital fingerprints, oils etc) with proper isolation to prevent shorts and that has adequate contact surface with the binding post, I can't imagine why you would have problems. Some that offer a high compression/locking design can improve the snugness and fit of the connection and make it more secure.
Even though the surfaces might be smooth, at the microscopic level the surfaces are rough, full of dips and voids that result in resistance due to lack of contact surface, so high compression plugs might help mate the connectors better but i would think that a conductive lube/grease might help lower resistance just as easily by increasing the conductive surface by filling in the gaps/voids, but I have never tried.
Anyhow, Good luck
