High End speakers Evolution were first introduced at the biggest Czech Audio Video Show Prague. The Evolution loudspeakers was introduced with Leben tube amplifier and a simple Pioneer SACD player. A faithful stereo, a lot of details and spatiality was surprise for many visitors of the show. Horn construction of the Evolution speakers contains only one high sensitive speaker driver. The power of the rear side of speaker membrane is used to excite the horn. High sensitivity and absence of frequency crossovers these loudspeakers rightly move to the world of high end audio.