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Depends on how the banana fits in the tube connection. I think tubes are slightly larger. I would not apply great force, but for break in, I would see no reason why not. Even if a cheeper units for break in. And replacing after. Should not matter to much. But for enjoying them, day to day.. I would loose the banana stuff.
What ever you use in the end game, make sure they are real. Real copper! And not a mix of copper and brass!