As a longtime HiFi-electronics (hobby -> [...]) with appropriate experience I can the "Nakamichi - HIGH END Banana 24K" Highly recommended! They are not as "clunky" like some other banana plugs, functionally absolutely thought out and two fixed screws for the perfect cable fixation (2,5er cable should be plugged twice). Above all the connectors are in the AMP speaker terminals "bombproof" and have very good contact !!!
Do me a whole set ordered, because I "good & cheap" my new Nubert wanted nuLine284 rewire with banana plugs per bi-amping, which now works perfectly :-)