Astell&Kern A&ultima SP4000 Copper
Astell&Kern is one of the most recognisable brands in the high-resolution portable player segment. The company built its reputation on advanced Android-based digital audio players designed to combine high sound quality with support for streaming services and a distinctive angular industrial design. The A&ultima line serves as the manufacturer's flagship series, where its most sophisticated technical solutions typically make their debut, including complex DAC configurations, elaborate headphone amplification stages and proprietary technologies intended to improve signal processing and reduce noise. Limited editions of these players have long attracted particular attention, and because copper is a material that carries strong positive associations in the hi-fi world, the standard A&ultima SP4000 is now joined by a special A&ultima SP4000 Copper version. According to the manufacturer, copper has been used not only for visual impact but also as a component intended to influence the sonic character directly. The new model is aimed at listeners who treat a portable player as a fully fledged high-end source in any listening environment.