The separation of frequency bands is carried out without the use of electric passive filters, but due to the

• natural blockage of the FR of each driver
• with the help of various acoustic load of the oscillating circuit of the system of sound guides for drivers
• acoustic rejective filters ANOR

This allowed us to avoid the negativ effects of using capacitors and inductances in the structure of the earphones, thereby increasing the linearity of their impedance and the electrical phase in the entire frequency range! This, in turn, increased the "fusion" and "coherence" of the sound of all MAD series models.