This is not a tone control or EQ, it is nothing seen before. This is a function of the DREI tech. and works in the analogue domain without any kind digital circuits.
Now we can adapt perfectly the overall sound of your audio system by increasing the synergy between the components. The immediate result is greater dimensionality and naturalness.
The stereo sound is three-dimensional, with depth, height and openness. The effective dynamic control (SYNERGY) establishes priorities for the impulse response of each of the different preamps or parallel buffers for each channel allowing perfect synergy within your complete system, optimizing the performance of the room and the speakers so that the result is neutral and real as possible.