when i hear this type of talk, encloding pipes needing to be certain lengths. First thing that comes to mind is a Transmission Line speaker project. for compactness and efficiency
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"The test of the machine is the satisfaction it gives you. There isn't any other test. If the machine produces tranquility it's right. If it disturbs you it's wrong until either the machine or your mind is changed." Robert M Pirsig.
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