The heart of Induction Dynamics® is found in the S4X™ Super Fourth-Order Crossover. The patented S4X™ inductively couples crossover coils and optimizes each driver's performance, individually and interactively with the other drivers. This greatly increases control over driver range, frequency response, phase and impedance. Because S4X™ produces such a steep crossover slope-and thus a flatter frequency response-Induction Dynamics® is able to use the best possible drivers for each range of frequencies, allowing us to sonically match every speaker in our lineup and to create speaker models able to perform in any combination and in any acoustic environment.

The S4X™' optimized frequency response means music that moves dramatically up and down in pitch will never fade in or out, but rather maintain its power as it seamlessly crosses over from one driver to the next. It also means that frequencies critical to human speech (frequencies that deliver consonants like "S" and "C") will sound as natural coming from your speakers as they would in real life-making dialogue from movies and television sound crisp and clearly understood.