It is relatively easy for single banana plugs to short out and possibly damage the amplifier when the wires become entangled or inadvertently pulled on while operating at high output.

polarity short

channel short

With OlsonICS dual banana plugs the speaker red(+) and black(-) terminals can not be shorted. As exemplified in these pictures it is also difficult to short the adjacent channels.

no short

OlsonICS dual banana plugs are the only dual banana plugs that fit the speaker terminals on many modern Home Theater Receivers and Amplifiers from Denon, Pioneer, Marantz, Audio Source, AVR, HK, Onkyo, Yamaha, and others.