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How to connect a DJ controller to an external mixer? Run a cable from the controller’s master output to a line input on the mixer, then keep both gain controls low and raise them together.

Plug into the wrong input, such as a microphone jack, and the sound clips into distortion before you’ve touched a fader.

VirtualDJ’s manual, Traktor’s manual and Native Instruments’ support pages spell out what each way of connecting needs, and the difference matters more than the cable.

You’ll see the simple way, the software way that uses the mixer’s own faders, which cable to buy and what to check when there’s no sound.

Start with the way most DJs need, which treats the controller as one source.

Can You Connect a DJ Controller to an External Mixer?

Yes, and there are two very different ways to do it. The simple way plugs the controller’s master output into one line input on the mixer, so the mixer receives the controller’s finished stereo mix like any other source.

The second way lets the mixer do the mixing, with each deck of your DJ software sent to its own mixer channel. That needs software that supports it and an audio interface with a separate output for each deck, and the sections below explain why a standard two-channel controller usually can’t do it alone.

If you haven’t set up the controller’s own sound and speakers yet, our guide to the basic controller-to-speakers chain comes first.

How to Connect a DJ Controller to an External Mixer Step by Step

The first way starts with the controller’s output, since that decides the plug you need. Pioneer DJ’s DDJ-FLX4 manual lists its master outputs as RCA pin jacks, compatible with RCA unbalanced outputs, on the rear panel, and it rates the master output at 2.1 Vrms into 10 kilohms.

Run an RCA cable from those jacks to a free line input on the mixer, and plug the controller into the channel input, not the microphone input. Numark describes the inputs on its M2 mixer as switchable phono and line inputs for turntables, CD players and other line sources, plus two dedicated line inputs and a separate quarter-inch microphone input, so a controller belongs on a line setting.

Turn the controller’s master level and the mixer channel’s gain down, connect the cable, then start a track and raise them together. The DDJ-FLX4 manual’s own advice for distorted sound is to set the trim, channel fader, crossfader and master level knobs to the correct positions, so start with those in the middle range.

In What Order Should You Connect and Power On the Gear?

Once the cable is in, the power-on order matters, and Pioneer DJ’s DDJ-FLX4 manual gives one that suits a mixer too. It says to connect your headphones, connect powered speakers or an amplifier to the master outputs, connect the computer over USB, turn on the computer, and only then turn on the devices connected to the output terminals.

If the computer doesn’t recognize the controller at the USB step, fix that first with the cable, port and hub checks for a laptop that can’t find the controller.

Here that means the mixer and the speakers behind it come on last. If you’re adding a microphone as well, the same manual lists it with those late devices.

Which Cable Do You Need?

That depends on the plugs at both ends. RCA pairs go into RCA line inputs, and Kettner Creative’s guide lists three routes for mixers with other inputs: RCA to quarter-inch, a quarter-inch TRS cable and an XLR to quarter-inch cable.

Three audio cable ends side by side: a pair of RCA plugs, a quarter-inch plug and an XLR plug

Kettner Creative adds a warning about levels: it says XLR and quarter-inch outputs are typically at a higher line level than RCA outputs, and that plugging a line-level output into a microphone-level input causes clipping and distortion. That’s the reason to use a line input, whatever the cable.

The controller decides the first end. The DDJ-FLX4 has RCA master outputs, while AlphaTheta’s page for the DDJ-FLX2 lists a 3.5 mm stereo mini jack as its master output, so the FLX2 needs a cable with a mini-jack plug at that end.

Numark lists 1/8-inch main outputs for the Party Mix II and DJ2GO2 Touch, so those need a mini-jack cable too.

The mixer decides the second end, so check whether its line inputs are RCA or quarter-inch. Whichever cable you buy, make sure both plugs are clean and seated, because the DDJ-FLX4 manual lists cleaning the terminals and plugs among its fixes for missing or distorted sound.

Why Can’t a Two-Channel Controller Feed a Mixer Channel per Deck?

Because the cable carries one stereo pair, and that’s all a typical two-channel controller has to send. VirtualDJ’s manual says using an external analog mixer requires a sound card with at least two stereo outputs, since each deck set up for external mixing needs its own stereo channel (VirtualDJ manual).

A typical two-channel controller has one master pair plus headphones, so it can’t give each deck its own output. That’s why the simple method sends the mixer a finished mix instead.

If you’d like true per-deck mixing, you need an audio interface with enough outputs, or a mixer that includes a USB audio interface, and the next section shows what the software does with it.

What Is External Mixer Mode in DJ Software?

It’s a setting that sends each deck to a separate output, so an outside mixer’s faders and EQ shape the sound. VirtualDJ says that with the routing done through the external mixer, VirtualDJ’s own volume faders, EQ, crossfader and PFL stay untouched, because an analog mixer has no way to send a digital signal back to the software.

A laptop and audio interface sending two decks through separate cables to two mixer channels

VirtualDJ adds that an Analog Mixer or Pro Infinity license is required for this setup. For two decks, its manual connects outputs 1 and 2 of the sound card to inputs 1 and 2 of the mixer, and outputs 3 and 4 to inputs 3 and 4 for the next pair, and you choose Separate Decks as the output option.

Traktor has the same idea. Its manual says to select External under Mixing Mode if you use an external mixer, then choose an output pair for each deck, which you can also sum onto one pair if your audio interface has limited outputs.

Which Traktor Setting Fits a Controller With Its Own Mixer?

Traktor’s external option isn’t meant for those controllers, and the answer for them is Internal mode. Native Instruments’ support article says External Mixing Mode assigns the decks to separate outputs of your audio interface for mixing with an external DJ mixer, and that you should use the mixer’s crossfader in that case.

For controllers with a mixer control section, such as the Traktor Kontrol S2, S4, Z1, Z2 or any Traktor Ready controller, it says to set the Mixing Mode to Internal. The Traktor manual adds that in External mode the channel faders, the crossfader and the headphone cue controls in Traktor are disabled.

Our page on Traktor controllers that set up automatically covers which controllers use the internal mixer.

How Do You Set the Levels So It Doesn’t Distort?

Whichever mode you use, level matching is the step that most often goes wrong. Traktor’s manual says that if you prefer to adjust the gain yourself, such as when using an external mixer or a controller with an integrated mixer, you can switch off Auto Gain in the Preferences, and then you must keep the audio levels below clipping.

A gain knob beside a level meter with six of nine segments lit

The same idea works for any software. Keep the controller’s master level moderate, then use the mixer channel’s gain to set the loudness, and back off if the mixer’s meter hits the top.

Why Is There No Sound Through the Mixer?

If the levels are right and there’s still silence, work through the chain in order. First, check the cable is in the controller’s master output, not its headphone jack, and that it’s in a line input on the mixer.

Next, check the mixer channel’s input selector, since Numark’s M2 has switches that choose phono or line on two of its channels. Then confirm the mixer channel fader and the mixer’s master level are raised, and that your DJ software is sending audio to the controller’s sound card.

If the sound crackles or drops out, clean the plugs and check the cable, and our page on what the makers say about cleaning a controller covers the fixes.

What About a Club or Venue Mixer?

The simple method is also the club method. Club Ready DJ School’s advice for playing on club gear is to take your own RCA cable and run it from the controller’s master output to a free channel’s line input on the club mixer.

That way you don’t take out their speakers, and the controller works like another deck. The same advice notes that if there’s no space for the controller, you may need to ask politely to move a deck aside, so it’s worth checking with the venue first.

Remember that the club mixer’s headphones only cue the channel you’ve plugged in, so use the controller’s own headphone jack to cue its decks.

Can You Use a Microphone With an External Mixer?

Yes, but the mixer’s microphone input is the one to use for it. Numark’s M2 has a dedicated quarter-inch microphone input with its own gain and EQ, separate from the line inputs your controller uses.

If you’d rather keep the microphone on the controller, our guide to plugging a microphone into a controller covers the jack and the level knob.

The Bottom Line

Connect the controller’s master output to a line input on the mixer with the right cable, keep the gains low, and raise them together. That works with any controller that has an audio output, and it’s the method clubs expect.

Use External Mixer mode only when you have an audio interface with an output for every deck. For a controller with its own mixer, keep the software in Internal mode.

Frequently Asked Questions

Can you connect a DJ controller to a mixer?

Yes. Connect the controller’s master output to a line-level input on the mixer, and raise the controller’s level and the mixer channel’s gain together.

Do you need a special cable to connect a controller to a mixer?

It depends on the plugs. The DDJ-FLX4 has RCA master outputs, and mixers with RCA line inputs take a plain RCA cable, while other mixers need an RCA to quarter-inch or another adapter cable.

Can a DJ controller replace an external mixer?

Most controllers include a mixer section, and Native Instruments’ support article says to use Internal mode for controllers with a mixer control section. You only need an external mixer for its inputs, outputs or the way it sounds and works on stage.

What does External Mixing mode do in Traktor?

It assigns each deck to its own output of your audio interface so an external DJ mixer can mix them, and Traktor’s own channel faders, crossfader and headphone cue controls are disabled.

Can you plug a controller into a phono input?

Numark describes its M2’s phono/line inputs as switchable for turntables, CD players and other line sources, and a controller is a line source, so use a line input or the line setting of a switchable one.