This design works well for compact home stereo and the simplicity of the crossover handles the power for P. A. systems, monitors, and  keyboard speakers.

   Perfect for studio monitors.  Based on Dr. Joseph D'Appolito's design this enclosure with a Butterworth 2-way crossover reduces the vertical "lobbing" effect.

   For the optimum high fidelity performance.  This system contains a high frequency tweeter, mid-range driver, low frequency "woofer" driver, and a 3-way crossover circuit .