As they are built into Speakers. For Bars Pubs Clubs KARAOKE Schools Duos Solo artists DJ etc. Suits any Venues Up To 400 people. 2 x ALTO TS410 10 powered Top Speakers 2500watts each inc Bluetooth. 2 x ALTO TS312S 12 powered Bass Bins.Ready to use - Just add Mics. We offer an optional Deliver in Person and set up on site service with product training by sound Engineer if required.