Formed around 1990 in California, the street-style group Proper Dos consists of artists like rapper and lyricist Frank Villareal, producer Ernie Gonzalez, mastering “Big Bass” Brian, and Stuart Wylen on bass, guitar, conga, and keyboards. Proper Dos has also had help on some recordings by special guests, including Big Shady, Lil Rob, Point Blank, Royal...