Cayin’s Magsafe-able tube dac-dongle of 2025 was the culmination of decades of expertise in sound topped by a team involved in making it relevant to today’s listening. Carefully designed with a Gen5 NuTube timbre circuit with refined three-stage amplification architecture, you can choose between three timbres: Classic tube(C), modern tube(M) and solid-state (icon).
Try the DC mode toggle to enable the Hyper Mode and hear a deeper rumble in the bass and what additional power can do. The RU9 is also designed with a custom anti-vibration module for the Nutube tube to eliminate microphonic interference and optimise your listening experience.
// SPECIFICATIONS – Tube: KORG Nutube 6P1 – DAC: 2x AK4493SEQ – Bluetooth version: 5.1 – Supported Codecs: LDAC, aptX HD, aptX LL, aptX, AAC, SBC – Fast Charge: QC3.0 / PD2.0 – Charging Time: 1.3 hrs – *Battery Life (3.5mm PO/LO): 4.7 hrs (SS), 3.5 hrs (Tube) – *Battery Life (4.4mm PO/LO): 4.3 hrs (SS), 3.1 hrs (Tube) *Battery life tested on pure battery mode, source playing 44.1kHz audio, 32 Ohms load, high gain and volume at level 30
// IN THE BOX – RU-9 – Blue leather case – L-shaped USB Type-C to Type-C interconnect – Magnetic adaptor ring (for Android compatibility) – Documentation
