60 watt active speaker system using TDA2030

A very simple multiway loudspeaker audio systems can be implemented using the TDA 2030 audio IC . This circuit is designed to provide the best possible acoustic performance since each loudspeaker is specially designed and optimized to handle a limited range of frequencies.
To maintain a flat frequency response over the Hi-Fi audio range the bands covered by each loudspeaker must overlap slightly.
Using simple active filters a simple complete 3-way 60W active loudspeaker system can be designed using few electronic parts .
It employs 2nd order Buttherworth filters with the crossover frequencies equal to 300Hz and 3kHz.

The midrange section consists of two filters, a high pass circuit followed by a low pass network. With VS = 36V the output power delivered to the woofer is 25W at d = 0.06% (30W at d = 0.5%).
The power delivered to the midrange and the tweeter can be optimized in the design phase taking in account the loudspeaker efficiency and impedance (RL = 4ohms to 8ohms).
It is quite common that midrange and tweeter speakers have an efficiency 3dB higher than woofers .