>sub bass >mid bass >mids >treble >highs >etc etc Genuinely WHAT the fuck do these terms even mean. I know they're the frequencies of the sound but how am I supposed to know what part of the song corresponds to those sounds so I can know if an IEM sounds good in those frequencies. Is bass guitar sub bass or mid bass? Are guitars treble? Are vocals highs or mids? What are some songs to test for each of those things so I can know what to listen for.