How can we help?

Pioneer DJ DJM-250MK2 Quickstart Guide

Licensing & software

To use this mixer with HID mode you will need a full Serato DJ Pro license. Additionally if you would like to use Serato DVS, you can purchase this, Serato DJ Pro, and all the Expansions included in our Serato DJ Suite license from our online store. 


The bundle will also need to be activated by signing into your Serato.com account in Serato DJ Pro before they are able to be used.  For more information about the required licenses to use a club mixer, check out the Serato DJ DVS licence guide here.

Please ensure you have the latest version of Serato DJ Pro installed:

Drivers & firmware

To install drivers for the Pioneer DJ DJM-250MK2, you must download them from AlphaTheta's website, here.

The driver and mixer utility will be bundled with the latest version of Serato DJ Pro. If the driver or utility is not installed on your computer when the mixer is connected, you will be prompted by an ‘INSTALL DRIVER’ pop-up. Click ‘INSTALL DRIVER’ and follow the installer prompts.

It is very important that you have the latest firmware installed for the Pioneer DJ DJM-250MK2. The update file and installation instructions can be found here on AlphaTheta's website.

Selecting Input source

Once turntables or CDJs are connected to the mixer, open the SETUP screen and click the AUDIO tab.
Click depending on what kind of input you have connected (Turntables/CDJs). You will need to make sure this is set accordingly for each channel.

Click the configuration you want to use. Click CUSTOM to open the Pioneer DJ driver panel. Here you can
further configure the inputs, outputs and FX preferences of the DJM-250MK2. For more information, see the DJM-250MK2 user guide here.

User Guide

For further information on the DJM-250MK2 controls and details on individual features please refer to the Pioneer DJ DJM-250MK2 Hardware User Guide. Download the Pioneer DJ DJM-250MK2 User Guide from the here.

Overview

Screenshot 2026-04-07 at 3.36.21 PM.png
# DJM-250MK2 CONTROL FUNCTION
1 ON/OFF SWITCH Press to turn the device power on/off
2 DC IN Connect power input
3 MASTER 2 RCA Master output
4 MASTER 1 XLR Master output
5 CH2 LINE/PHONO Channel 1 RCA Phono/Line input
7 CH1 LINE/PHONO Channel 2 RCA Phono/Line input
8 AUX Auxiliary input
9 MIC INPUT XLR & 1/4” dual microphone input
10 USB A/B Connect USB cable from PC
Screenshot 2026-04-07 at 3.39.20 PM.png
# DJM-250MK2 CONTROL FUNCTION
1 FILTER Channel combo filter (Lowpass/Highpass)
2 PARAMETER Adjust Parameter/amount
3 MIC TONE Adjust MIC Tone
4 MIC LEVEL Adjust MIC Level
5 AUX IN TRIM Adjust AUX input volume
6 CHANNEL EQ 3-band Channel EQ
7 AUX IN INPUT SELECT Toggle AUX input Source
8 CHANNEL TRIM Adjust trim
9 CHANNEL INPUT SELECT Toggle Channel Input Source
10 MASTER VOLUME Adjust Master output volume
11 HEADPHONES MIX Adjust Headphones output volume
12 HEADPHONES LEVEL Adjust Headphones output volume
13 FILTER Channel Filter on/off
14 CHANNEL CUE Enable Channel headphone cue
15 CROSSFADER CURVE Adjust Crossfader Curve
16 CHANNEL FADER Adjust Channel volume
17 CROSSFADER REVERSE Reverse Crossfader channels
18 CROSSFADER Fade audio between channels A-B

MIDI

The MIDI feature in Serato DJ Pro allows you to remap Serato DJ Pro software functions to your primary Serato controller, interface or mixer. You can also assign controls to a secondary MIDI controller to further enhance your performance.

For more information on MIDI mapping with Serato DJ Pro, click here.

To remap your supported Serato device, open the SETUP screen and click the MIDI tab. If your Serato device supports hardware remapping, it will appear in the MIDI DEVICES list.

Select your connected device from the MIDI DEVICES list and check the Allow Serato Hardware Remapping option.

Once checked, the MIDI assign button at the top of the main Serato DJ Pro interface will become available for you to start remapping.

You can save, edit or delete MIDI presets in the MIDI tab of the SETUP screen. Clicking Restore Defaults will erase any custom mappings for all connected devices and revert their functions back to default.

Help

Show Tooltips

Click on the Help button in the upper right-hand corner of Serato DJ Pro, then Show Tooltips to enable Tooltips. Tooltips provide a handy way to learn the various features of Serato DJ Pro.

Move the mouse over a section of the software to bring up a context-sensitive tooltip that describes the feature.

Click on the Help button again to turn off Tooltips.

Show Shortcut Keys

Click on the Help button in the upper right-hand corner of Serato DJ Pro, then click Show Shortcut Keys to launch a pop-up window displaying shortcut keyboard combinations.

These shortcuts can help you perform various actions quickly, such as triggering specific deck functions, controlling playback, or navigating the library.

Watch Tutorials

Click on the Help button in the upper right-hand corner of Serato DJ Pro, then Watch Tutorials to launch
your default internet browser and watch tutorials to help you get familiar with Serato DJ Pro.

Get Support

Click on the Help button in the upper right-hand corner of Serato DJ Pro, then Get Support to launch your default internet browser and navigate to the Serato DJ Pro knowledge base, where you can find helpful articles and guides on Serato DJ Pro. Alternatively, type keywords in the Search Help box to search the Serato DJ Pro knowledge base for specific, related topics.