With the AlphaTheta DDJ-GRV6 + Pioneer DJ HDJ-X5 Black, you can hear what you're mixing right away in peace. The DJ controller has 4 channels, so you can connect up to 4 different music sources. 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. The headphones have a 5 to 30,000Hz frequency range, so you can hear every pitch clearly. This way, you can hear every detail in your mix. Thanks to the tiltable ear cups, you can easily listen to your music with 1 ear. This is useful when you play live and want to hear the audience. You can switch the ear cushions when they're worn out. Thanks to this, the headphones last longer.