Cayin RU9 Portable USB DAC & Headphone Amplifier, Dual ROHM BD34301EKV DACs, Fully Balanced Design, DSD512, PCM 768kHz, OLED Display, CNC Aluminum Body, Black | RU9

Cayin The Cayin RU9 is the latest addition to the RU series. It is a compact, portable DAC and amp that brings the classic tube sound to your mobile audio experience. Featuring the Korg NuTube 6P1 vacuum tube, the RU9 offers audiophiles a unique blend of classic and modern sound signatures. Specification Tube KORG Nutube 6P1 DAC Chip AK4493SEQ ×2 Charge Port USB Type-C (QC3.0 / PD2.0) USB Processor XMOS XU316 Bluetooth Processor QCC5125 Battery 2000mAh, 3.85V, 7.7Wh Lithium Polymer Dimension 100 × 70 × 15 mm Weight 150g (±5g) 3.5mm PO/LO Battery Life (Solid-State) 4.7 hrs 3.5mm PO/LO Battery Life (Vacuum Tube) 3.5 hrs 4.4mm PO/LO Battery Life (Solid-State) 4.3 hrs 4.4mm PO/LO Battery Life (Vacuum Tube) 3.1 hrs Charging Condition QC3.0 / PD2.0 Charging Time 1.3 hrs 3.5mm PO Output (Solid-State Timbre) Output Power: 310mW+310mW (BAT), 420mW+420mW (DC), 440mW+440mW (BAT, RL=16Ω), 610mW+610mW (DC, RL=16Ω); Frequency Response: 20Hz–32kHz; THD+N: ≤0.008%; Dynamic Range: ≥119dB; SNR: ≥118dB; Channel Separation: ≥76dB; Gain: H 0dB / M -6dB / L -12dB; Output Impedance: 0.5Ω 3.5mm PO Output (Classic Tube Timbre) Output Power: 310mW+310mW (BAT), 420mW+420mW (DC), 440mW+440mW (BAT, RL=16Ω), 610mW+610mW (DC, RL=16Ω); Frequency Response: 20Hz–22kHz; THD+N: ≤3.0%; Dynamic Range: ≥105dB; SNR: ≥104dB; Channel Separation: ≥68dB 3.5mm PO Output (Modern Tube Timbre) Output Power: 310mW+310mW (BAT), 420mW+420mW (DC), 440mW+440mW (BAT, RL=16Ω), 610mW+610mW (DC, RL=16Ω); Frequency Response: 20Hz–32kHz; THD+N: ≤0.6%; Dynamic Range: ≥115dB; SNR: ≥114dB; Channel Separation: ≥76dB 4.4mm PO Output (Solid-State Timbre) Output Power: 620mW+620mW (BAT), 1000mW+1000mW (DC), 730mW+730mW (BAT, RL=16Ω), 1170mW+1170mW (DC, RL=16Ω); Frequency Response: 20Hz–32kHz; THD+N: ≤0.008%; Dynamic Range: ≥119dB; SNR: ≥118dB; Channel Separation: ≥103dB; Gain: H 0dB / M -6dB / L -12dB; Output Impedance: 1.0Ω 4.4mm PO Output (Classic Tube Timbre) Output Power: 620mW+620mW (BAT), 1000mW+1000mW (DC), 730mW+730mW (BAT, RL=16Ω), 1170mW+1170mW (DC, RL=16Ω); Frequency Response: 20Hz–22kHz; THD+N: ≤3.0%; Dynamic Range: ≥105dB; SNR: ≥104dB; Channel Separation: ≥93dB 4.4mm PO Output (Modern Tube Timbre) Output Power: 620mW+620mW (BAT), 1000mW+1000mW (DC), 730mW+730mW (BAT, RL=16Ω), 1170mW+1170mW (DC, RL=16Ω); Frequency Response: 20Hz–32kHz; THD+N: ≤0.6%; Dynamic Range: ≥115dB; SNR: ≥114dB; Channel Separation: ≥103dB USB Mode UAC2.0 / 1.0 (Selectable) Windows Compatibility Windows 10 or later (Cayin USB Audio Driver may be required) Mac OS X Compatibility Driver-free Android Compatibility Driver-free iOS Compatibility Driver-free USB Audio Format PCM: 16–32Bit, 44.1kHz–768kHz (UAC2.0); DSD: Native DSD64–512, DoP64–256 (UAC2.0) Bluetooth Codec Support LDAC, aptX HD, aptX LL, aptX, AAC, SBC Bluetooth Version BT v5.1 Bluetooth Audio Format PCM: 16–24Bit, 44.1kHz–192kHz S/PDIF In Input Connector: 3.5mm Port (shared with S/PDIF Out) S/PDIF Out Audio Format: PCM: 16–24Bit, 44.1kHz–192kHz Note Specifications ba