The idea of this Vivo X1 is that BBK wants to take audio very seriously on its new flagship phone, which is why it's been given a Cirrus Logic CS4398 digital-analog converter plus a CS8422 sample-rate converter -- a combo that's seemingly popular amongst Hi-Fi connoisseurs and manufacturers. And to match that audio performance, BBK's also throwing in a pair of Beyerdynamic MMX 71 iE earphones (20Hz-22kHz, 12Ω, 104dB) as part of the ¥2,498 ($400) package; though you can also choose the AKG K420 or the Sennheiser CX215 instead when buying from BBK's official online store.
