although I have never used Dunlavys or naim amps I know that the reason naim amps require use of their own cables is that the amplifiers require a high inductance, low capacitance load (unlike some other amps). However since inductance and capacitance are proportional to the length of the cable and the length of the jumper is negligible compared to the existing speaker cables I cannot see any problem at all in using jumper cables of any make instead of the connecting plates.
The only problem with stripping a long section of the naim cables is that the cables will then oxidize ... I prefer well fitter spade connectors myself.
The only problem with stripping a long section of the naim cables is that the cables will then oxidize ... I prefer well fitter spade connectors myself.