The ­DMP-Z1, a digital music player with a built-in analogue amplifier, reduces signal deterioration and noise caused by cable connections. It is operated with direct current, which is stable and relatively silent. The chassis of the player is fashioned from aluminium, which not only provides high rigidity but also minimises unnecessary resonance and dis­tortion. The large, analogue volume controls with gold plating are another significant feature, underscoring the premium appearance of the player.