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Antifish were a band ages ago and now they are recordings. But if you were to put those recordings into giant robots with cannons for arms then while you dominated the world's military resources to assume complete control of the globe, you would have some punk band from Canberra which doesn't exist anymore playing as well. And you could probably make the speakers pretty big if you wanted. At least as big as the robots' torso. Assuming you went for a bipedal humanoid robot, in which case you probably spent a lot of time on balance you could have spent on something else... So. Logistics