Based on equal-loudness contour, a 50dB sound would most likely sound like 20dB at most, below 100Hz. With the average human which stops at around 5dB(@1kHz), you basically only have -15dB of audible dynamic range. Anything below 40Hz is most likely inaudible.

Somewhat weird especially for hip hop which emphasizes a lot on sub-bass. It's either he has a godlike hearing capability or he misses measured how loud it is.

Though I might be totally wrong, I am not 100% sure about it.

> thought he is more of a Soul/Funk

He mention in one of his video, that he listen to Japanese Hip Hop quite often. He also did mention in his airpod pro 2 video that his listen at 52dB.