It gets harder every time it gets smaller, so RU6 Cayin marks itself as a master showing how they can make it work. The chain of 48 resistors from RU6, derived from R01, gives mobile audio an unprecedented sound fidelity.

Your music is decoded up and down on the RU6 ladder from individual resistors packed into two separate six-layer circuit boards in the thumb-sized case.

We pay attention when Cayin RU6 implements typical R2R – with a NOS (Non-Oversampling) mode. That's double because the required precision increases. Amid minimal digital filtering, the analog quality of R2R is delivered undisturbed to your ears.

However, reference sound lovers don't have to worry, as RU6 can switch from NOS to Oversampling mode for the cleanest result. This removes every last distortion and artifacts beyond the audible human hearing range, allowing you to simply enjoy your music naturally through another Cayin innovation.