The Lowdown The AlphaTheta XDJ-AZ is the ultimate flagship, four-channel standalone DJ unit and controller for Rekordbox and Serato software. Based closely upon AlphaTheta/Pioneer DJ’s pro club gear, namely the CDJ-3000 multi players and the DJM-A9 mixer, this one nails it, fixing all the shortcomings of the XDJ-XZ and delivering everything most serious DJs [...]