this post was submitted on 15 Jul 2025
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Today I Learned (TIL)

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TIL why 33⅓ LPs have small center holes and 45s have large ones. It's the result of a format war between Columbia Records and RCA, which gave 45s a larger hole to work better with automated record... (davidsarnoff.tcnj.edu)
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The original was posted on /r/todayilearned by /u/PikesPique on 2025-07-15 18:38:16+00:00.

Original Title: TIL why 33⅓ LPs have small center holes and 45s have large ones. It's the result of a format war between Columbia Records and RCA, which gave 45s a larger hole to work better with automated record changers. Spindle adapters were later invented so both formats can play on the same turntable.

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