How to Set Up a DDJ-FLX4
Updated Nov 13, 2026 · By 
Jonah Mercer · Editorial policy
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To set up a DDJ-FLX4, connect it to your computer or phone by USB or Bluetooth, plug speakers into its built-in sound card, and open djay, rekordbox or Serato DJ Pro. The controller is a 2-channel, 2-deck unit with 16 pads and a Smart Fader, and it takes a mic input for livestreaming from one device.
Connect the controller to your device
Plug the USB cable from the DDJ-FLX4 into your PC, Mac, iPhone, iPad or Android device. The controller also connects by Bluetooth if you prefer a wireless link. A built-in sound card handles the audio, so you do not need a separate interface for speakers. Keep the cable clear of the controls so nothing snags while you mix.
Plug in speakers and headphones
Connect speakers to the outputs on the controller so the built-in sound card drives them. Set the speaker volume low first, then raise it in small steps. Check that the decks play through the speakers before you start a mix.
Open your DJ software
Open djay, rekordbox or Serato DJ Pro on the connected device and let it find the controller. The FLX4 works with djay, rekordbox and Serato DJ Pro, so pick the one your library already lives in. Load a track on each deck and check that the faders and 16 pads respond. If the software does not see the controller, unplug the USB cable, plug it back in and restart the software.
Set the mic input for livestreaming
Plug a mic into the mic input when you want to talk over the mix or host a livestream from one device. Use the mic input for livestreaming, and let the Smart Fader blend genres by moving one fader. Set the mic level low first, then raise it until your voice sits over the music without drowning it out.
Check the mix before you go live
Run a short mix through the speakers and listen for dropouts or a deck that stays silent. Check that the Smart Fader moves the volume, bass and BPM as you slide it, and that the pads trigger Hot Cues, Pad FX, Beat Jump and the Sampler. Fix any loose cable before the set starts, and keep a spare USB cable nearby.
What you need
Pioneer DJ DDJ-FLX4 2-Channel DJ Controller
A 2-channel, 2-deck controller with 16 pads, Smart Fader and a mic input, connecting to PC, Mac, iPhone, iPad or Android by USB or Bluetooth.
- Mixer channels / decks: 2
- Pads: 16
- Software named in listing: djay
- 1-year warranty stated
Denon DJ SC LIVE 4 Standalone DJ
A standalone 4-deck controller with Engine DJ OS, a 7 inch touchscreen, built-in speakers and Wi-Fi streaming, with no laptop needed.
- Mixer channels / decks: 4
- Standalone (no laptop)
- Software named in listing: Serato DJ
- 1-year warranty stated
AlphaTheta DDJ-GRV6 4-Channel DJ Controller
A 4-channel controller with Groove Circuit, full-size jog wheels, 8 pads and a club-standard layout, working with rekordbox and Serato DJ Pro.
- Mixer channels / decks: 4
- Pads: 8
- Software named in listing: rekordbox
- 2-year warranty stated
Pioneer DJ DDJ-FLX10 4-Channel DJ Controller
A 4-channel flagship controller with Track Separation, large jog wheels with on-jog displays and a built-in DMX output, working with rekordbox and Serato DJ Pro.
- Mixer channels / decks: 4
- Software named in listing: rekordbox
- 1-year warranty stated
These come from our ranked list Best DJ Controller, which compares them spec by spec.
Frequently asked questions
Do I need a laptop to use the DDJ-FLX4?
No. The FLX4 connects to a PC, Mac, iPhone, iPad or Android device by USB or Bluetooth. Open djay, rekordbox or Serato DJ Pro on the connected device and the controller is ready to mix.
What software works with the DDJ-FLX4?
The FLX4 works with djay, rekordbox and Serato DJ Pro. Pick the one your library already lives in, since the controller connects by USB or Bluetooth.
Can I livestream from the DDJ-FLX4?
Yes. The FLX4 has a mic input for livestreaming from one device, so you can talk over the mix while you stream. Connect the controller to your phone or computer, open your streaming app and set the mic level before you go live.
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Product details come from each Amazon listing and can change. Check the listing before you buy.