ESI uniK 04 Studio Monitors - The uniK 04 is the first truly professional 4" active 2-way studio monitor in this class by ESI. Making the most out of the top quality kevlar 4" and the 1" high frequency driver, the advanced 50W amplifier and electronic circuitry provides the perfect match. To further improve the design, the loudspeakers feature a special curved front, eliminating any unwanted distortions. All this makes uniK 04 the perfect solution where reference monitoring at close proximity without compromise is required, particularly in difficult listening environments