Pioneer Dj DDJ-FLX4 Portable 2-Channel rekordbox DJ and Serato Controller (Graphite) - Manual (Page 36)

Part names and functions
36
En
Front panel
1 (headphones) output terminal
Connection for your headphones.
Stereo mini phone plugs (ø 3.5 mm) can be used with the unit.
• Only use headphones with 32 Ω or more impedance. Headphones with
impedance lower than 32 Ω won’t work with the unit.
1