Active loudspeakers are indispensable in today's sound scene. They form the perfect symbiosis between power amplifier and loudspeaker. Advancing digitalisation has made it possible to make groundbreaking innovations in recent years. The incorporation of digital signal processors is one of the most important innovations; They offer the possibility of a perfect acoustic coordination of the entire system. Even FIR filters have become more and more integrated into the electronics and offer a listening experience which would be very difficult to achieve with conventional technology. A further advantage are the highly efficient overload, temperature and direct current protection circuits which are already integrated in many active speakers. Integrated limiter provide the possibility to maintain an undistorted sound, even in the case of overdrive.