This chapter explores cultural theories of sub-bass production and reception in electronic dance music (EDM), reggae, and other bass-heavy popular musics. After a brief review of the musicology surrounding sub-bass (particularly the work of Steve Goodman and Julian Henriques), the discussion moves on to a cultural history of the sub-bass signal chain, including the subject of subwoofer design and other aspects of audio engineering for the reproduction of musical sounds below 100 Hz. The chapter details the perceptual responses to low frequencies and the physics of sub-bass sound propagation in order to critique the mystification of recent theorists of “bass culture.”