Full Scale System. No limits. The Evo 4 is the highest achievement in AudioNec’s Evo line. This dual tower loudspeaker offers, thanks to its uncompromising design and components, the ability to effortlessly play any type of music, even in very large rooms. With nothing less than eight 15-inch (38 cm) subwoofers per pair, and 10 drivers per channel, it is capable of playing from infrasounds at high levels without any distortion to the highest harmonics up to 45 kHz in impressive clarity and speed. In short, Evo 4 is an Evo 3 enhanced with two impressive subwoofer towers making the difference.