Whether you're a musician taking the stage or a DJ packing the dance floor, make an impact with the Mackie Thump15v4 professional loudspeaker featuring SoundCheck DSP. Sound check is as easy as pressing a button, with selectable voicing modes that transform the Thump15v4 into an ideal PA speaker, DJ speaker, stage monitor or flat speaker with pure sound. Music Ducking, Feedback Eliminator and Outdoor Mode are life savers that keep high-pressure professional gigs running smoothly. Connect your mic and other sources to the built-in mixer. Pair your phone via Bluetooth® for wireless streaming and linking. Control every setting wirelessly from the app.