The CSB-Active 15 inch PA speaker is a powerful, all-in-one system that's perfect for Karaoke at home, pubs, bars and more. A high efficiency 15 inch woofer with superb bass and piezo horn for those mid-range and highs, this system takes care of all your frequencies with ease. Self powered Active System No need for an external amplifier, the CSB-Active range come ready to go. A powerful 800 watt integrated amplifier with on-board treble, bass and master volume control control section. It's all taken care of. Plug in, switch on and play.