FV, welcome. As Jack said, the standard center to center distance for dual banana plugs is 3/4". Some speaker terminals and many receiver terminals have a different separation. I don't know what the distance on the 2500 is. As was also said, you should also consider simply using the bare wire rather than banana plugs, which are a convenience if you're going to be frequently connecting and disconnecting, but otherwise don't have any special advantage.

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Enjoy the music, not the equipment.