Posted 20 hours ago

Cayin RU6 USB DAC Headphone Amplifier

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It's impressive how Fiio has considered the upgrade path for E7 DAC owners by integrating an iPod-style dock connector into the E9. On the front of RU6 you will find 1” OLED screen display to view playback info, such as sampling rate, volume level, gain setting, and NOS or OS oversampling mode. Within, the user has the option to toggle screen timeout and brightness in addition to toggling NOS/OS modes and low/high gain.

Playing Daft Punk’s “Prime Time Of Your Life” the harmonics and synthesized instruments are very lively presented. This safeguards the audio signal integrity and ensures the noise from the reference clock and DSP do not bleed into the amplification circuit.This circuit design combined with the R-2R architecture enables the RU6 to support hi-resolution PCM and DSD audio formats with support for 384kHZ PCM and DSD 64/128/256 natively.

Cayin is using only resistors that can deliver extreme precision and remain stable during temperature changes. Included were a short, properly shielded usb-c to usb-c OTG interconnect cable and a cool usb-c to usb-A adapter to use RU6 with devices that have standard usb port.It’s almost impossible to follow up on all of them, but in all honesty, I don’t think that’s needed either. Digital filter-less, no post-processing, optimised in time domain, low phase distortion and jitter, no ringing artefact. After spending 2 months of testing RU6, plus a ton of posts I made and questions I answered on Head-fi about it, it’s time to summarize everything in my full review. Audio U18t (v28, HG) – slightly mid-forward signature due to more neutral bass quantity of U18t, still with a good extension and punch, just closer to neutral in quantity. Unfortunately, Cayin can’t afford to use the same high precision resistors, so they went down one step and adopted high precision low TCR Thin Film Resistors rated at ±0.

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