Astell & Kern A&ultima SP4000 Copper Limited Edition Portable High-Resolution Digital Audio Player for tv 5 mm (shared with PO

5 mm (shared with PO port)

we have circumvented these issues by working with world-renowned driver manufacturers to customize our own balanced armature drivers

Knowles BA drivers

The housing of the T5 has been constructed of aviation-grade aluminum to achieve an even more refined look

Fatigue-free

Astell & Kern A&ultima SP4000 Copper Limited Edition Portable High-Resolution Digital Audio Player for tv 5 mm (shared with POLimited Edition Copper The A&ultima SP4000 Copper Limited Edition goes beyond a high end portable audio player. It represents the culmination of Astell&Kerns expertise in material engineering, precision manufacturing, and refined analog sound design. SP4000 Copper is the brands most definitive answer to a single question: how far can we go in the pursuit of the ultimate sound? Copper is theoretically one of the most ideal materials for audio, yet