I own a contra-bass guitar. Its lowest note is C#0, a 17.32Hz sound wave that is 65.32 feet in length at 360° phase. This frequency is below human hearing range yet can be detected by the ear's soft tissue. I want to produce this frequency at the highest accuracy. I propose a speaker 65.32 feet in diameter with enclosure to achieve this. How effective, in theory, would a speaker this size be in this solution?

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