With the AlphaTheta DDJ-GRV6 + Pioneer DJ DM-40D-BT Black, you get a set that you can use to listen to your produced music right away. The controller has 4 channels, so you can connect up to 4 different music sources to the controller. Thanks to this, you can use different sounds in your mix. With the Groove Circuit function, you can change drums of a song to get more variation. You can change the rhythm, for example. Thanks to the switch on the back of the speaker, you can switch between DJ and production mode. In the production mode, the audio sounds neutral and detailed, so you can hear well what you're mixing. With the DJ mode, the sound receives a small boost. This way, the audio sounds full and powerful in the space. Via Bluetooth, you can stream music from your smartphone and you can use the speaker for more than just DJing and producing.