The FOUR is built around direct Stems handling on the surface. A dedicated Stems pad mode, independent Acapella and Instrumental buttons, and RANE’s exclusive STEM SPLIT feature give you multiple ways to separate, balance, and route track elements. This lets you treat vocals, drums, melodies, and other parts as live sources instead of static tracks, without leaving your usual performance flow.

Eight OLED displays above the 16 Performance Pads provide visual feedback for every pad mode. You can see cue, loop, and sample names, roll and loop lengths, beat divisions, Pitch Play tuning, and which Stems elements and FX are active, directly above the pads. This makes it easier to stay locked on the controller and the crowd instead of watching the laptop screen.

A dynamic internal FX engine gives you 22 hardware Main FX and 4 knob controlled Channel FX, with access to Serato DJ software FX when you want to extend the palette. Classic tools like reverb, echo, filter, and flanger sit alongside modern additions like Scale Down, Recycler, and Riser, tuned for clear response on club systems. Channel FX such as Filter, Filter Roll, Noise, and Flanger sit on dedicated knobs for quick, hands on shaping of individual channels or stems.

The FOUR’s 4 channel mixer section offers full EQ control, intuitive FX assignment, and enhanced sampler routing so you can treat the sampler like a true additional source when needed. Quick access deck selection buttons let you control up to four software decks from the main surface, and two Line/Phono inputs on the rear panel support external turntables or decks when you want to bring in vinyl or other hardware.

The mixer section features a tension adjustable MAG FOUR crossfader, designed for scratch and performance work. External tension adjustment lets you set the feel without opening the unit, while contour control and assignment switches keep your preferred curve and routing close to hand. Whether you are cutting stems, tracks, or external decks, the crossfader is built to handle fast, precise moves.