https://en.wikipedia.org/wiki/Southern_hip_hop

"Within the hip hop community the south was the last region to gain any real critical acceptance, and this fact weighs heavily on both the lyrical direction and production aesthetic of many albums released in the 1990s. However, the south can be traced slightly further back to Miami Bass, in particular 2 Live Crew. Because of this root in bass-oriented music, the low-end has been emphasized in most southern hip-hop beyond most productions from other regions, especially the TR-808 synthesizer."

"Productions are also noticeably southern in sound, utilizing samples of southern-bred soul artists as well as touches of southern style guitar and brass instruments. Vocally, southern artists often (but not always) rap much slower than their counterparts in other regions, keeping their lyrics simple and heavily informed by regional slang."

https://rateyourmusic.com/genre/Southern+Hip+Hop