He plays using the percussive rockabilly/psychobilly bass technique known as slap bass, in which the strings are pulled away from the fingerboard until they snap back, and the strings are rhythmically slapped against the fingerboard. The German rockabilly bassist Didi Beck cites Wallace as one of his influences.[2]
Concert reviews take note of the stunts that Wallace does with the bass, such as throwing it into the air[3] or playing it on its side while Heath stands on top of it and plays guitar.[4]
He has a signature tiger-striped upright bass manufactured by King Double Basses.[5] He has been an endorser for Gallien-Krueger bass amplifiers. On stage, he uses a 4x10" cabinet and a 1x15" cabinet with a GK amp.
2013; White People & the Damage Done; Jello Biafra & the Guantanamo School of Medicine; upright Slap Bass
2012; 25 to Life; The Reverend Horton Heat; Composer
2009; Laughin' & Cryin' with the Reverend Horton Heat; The Reverend Horton Heat; Bass (Upright)
2008; Psychobilly Christmas; Bass (Upright)
2006; 20th Century Masters - The Millennium Collection: The Best of the Reverend Horton Heat; The Reverend Horton Heat; Composer, Guitar (Bass), Main Personnel, Vocals (Background)
2005; We Three Kings; The Reverend Horton Heat; Bass (Upright), Guitar, Main Personnel, Vocals (Background)
2004; Revival; The Reverend Horton Heat; Bass, Guitar (Bass), Member of Attributed Artist