Astell&Kern SP4000 Color:Black which is 'to provide the

which is 'to provide the best value that no one can imitate while using the most innovative and uncompromising design and craftsmanship'

The switchback coil is more efficient at reproducing lower frequencies and is positioned in the upper part of the driver

16Ω: SE 250mW / BAL 560mW

a protective structure has been added around it

Astell&Kern SP4000 Color:Black which is 'to provide theBuilt on Legacy, Evolving Perfection The A&ultima SP4000 is Astell&Kerns 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 seriesAstell&Kerns flagship lineup combining cutting edge technology and top tier specificationsthe SP4000 surpasses the boundaries set by the SP3000, once regarded as the ultimate reference. Built upon an advanced