Engine DJ 3.1 has just been announced for all Engine devices and includes a whole new suite of FX options, touch FX, and smart playlists. At the same time, Denon DJ is also releasing the Prime 4+, a new version of their flagship four deck, all-in-one device, which brings a few aesthetic changes and tweaks to things like the jog wheels. Mojaxx takes a close look at both the software and hardware on the new episode of Beatsource Tech.