Astell & Kern A&ultima SP4000 Portable High-Resolution Digital Audio Player Color:Silver 56mm Ring Radiator dynamic transducer

56mm Ring Radiator dynamic transducer system

The input stage employs a fully balanced amplifier architecture

to be applied to in-ear monitors

Dimensions (WxDxH): 21

Astell & Kern A&ultima SP4000 Portable High-Resolution Digital Audio Player Color:Silver 56mm Ring Radiator dynamic transducerSP4000 Built on Legacy, Evolving Perfection The A&ultima SP4000 is Astell&Kern's newest flagship digital audio player, the result of three years of relentless research and innovation following the development of the SP3000. As part of the A&ultima series Astell&Kern's flagship lineup combining cutting edge technology and top tier specifications the SP4000 surpasses the boundaries set by the SP3000, once regarded as the ultimate reference. Built upon