Properly Connecting Speakers to DDJ-400/FLX4 (2026)

Speakers Not Working on DDJ-400? Connect & Fix (13 Issues)

Quick 2026 setup note: For the DDJ-FLX4, AlphaTheta’s beginner setup guidance still points to a PC/Mac or mobile device, powered speakers or a power amp, headphones, and the correct USB cable. If audio is silent, first confirm whether sound is routed to the controller, the computer speakers, or a mobile device. AlphaTheta notes that with … Read more

Headphones Not Working on FLX4/DDJ-400? Here’s How to Fix It

How to Get Headphones to Work on Pioneer DDJ-400

Many people have told me that they have problems with sound output on Pioneer DDJ-FLX4 and DDJ-400 connected to Rekordbox. Most of them were fairly new to DJing, eager to learn to mix, and afraid their controller might arrive broken. Some were having problems immediately after unpacking, and some successfully used their headphones since purchasing … Read more

How to Use Multiple MIDI Controllers at Once

Quick answer (2026 update): Yes, you can use multiple MIDI controllers at once. The cleanest setup is to give each controller its own MIDI input or track in your DAW, then map knobs and pads only where you need them. If you are combining DJ controllers with production controllers, start with one main clock source, … Read more