13.The difference between K11 and K11 R2R

Outlooking differences: K11 R2R comes with R2R logo while K11 does not have. The other appearances are same,

Internal circuitry differences: K11 uses CS43198 as the DAC chip, while the K11 R2R uses sign-magnitude R2R as the DAC chip. Some of the corresponding circuits are slightly different.

Parameters differences: The THD+N & Noise and noise floor of K11 and K11 R2R are nearly the same.

Software settings function differences: K11 uses the CS43198 as DAC chip so it comes with a filter setting function. The K11 R2R uses sign-magnitude R2R as the DAC chip, so it has no filter function and the filter setting option is removed. But the oversampling mode and smart idlefunction are added for K11 R2R.

In terms of sound, as the first R2R product of FIIO, consumers are certainly more interested in the product's sound performance. After a number of inner comparisons, as well as the exhibition listening, the general feedback is that the K11 R2R has better flexibility in low frequency, thicker vocals and richer feelings, while the K11 is better in resolution!