A CDJ is a professional DJ player. The name comes from compact disc jockey: Pioneer built it for CDs. Today it reads USB, laptops and often streams.
CDJs, plural, are the pair in the booth. Berlin booths often run a pair of CDJ-3000s plus a mixer. Playing “on CDJs” means the club’s players, not a laptop controller.
Pioneer DJ is now AlphaTheta. The shape is the same: large jog wheel, cue, pitch, hot cues. The stick carries Rekordbox or Engine.
Questions
What is a CDJ?
A CDJ is a DJ player for the booth. It started on CDs. Today it reads USB and often a laptop. Pioneer set the format, now AlphaTheta.
What does CDJs mean?
CDJs is the plural. Two players plus a mixer is the standard booth. Playing on CDJs means the club’s decks, not your own controller.
Which CDJs are in Berlin clubs?
Often a pair of CDJ-3000s plus a mixer. Older booths still run 2000-series units. The DJ’s rider says what they expect.