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Cayin RU9 Portable 6P1 Electronic Tube Headphone Amplifier Bluetooth5.1 Magnetic Rear Panel Audio Decoder AK4493SEQ DAC
Key Features:
For Nutube 6P1 Application:
- Supports both single-ended 3.5mm and balanced 4.4mm PO/LO outputs.
- Each output can toggle between tube and solid-state modes.
Classic:
- No global negative feedback; each stage uses local feedback.
- Tube amplification introduces higher total harmonic distortion (THD).
- Rich harmonic texture delivers a warm, nostalgic sonic flavor — classic “tube sound.”
Modern:
- Introduces global negative feedback to define total gain.
- THD is significantly reduced.
- Harmonically cleaner, quieter background while preserving the warmth of tubes.
- Yields a sweet, clear, and delicate modern tube audio signature.
Solid-state:
- Based on precision-tuned op-amp ICs and peripheral circuits.
- Offers neutral tonality, fast transients, and highly accurate audio reproduction.
- Ideal for listening to music with its original, uncolored character.
Dual AK4493SEQ DAC:
- Equipped with dual AK4493SEQ DACs, each operating in mono mode.
- Left and right channels are decoded separately for lower crosstalk and better channel separation.
16-Core for XMOS XU316 Processor:
- Employs the latest generation XMOS XU316 USB Audio solution for high-performance digital processing.
Triple Power Supply Modes:
- Built-in 2000mAh lithium battery provides up to 4.7 hours of battery-powered use. Also supports USB power from the external device (without charging the battery), as well as external DC power supply for increased output power.
- Compatible with QC/PD fast charging.
Hyper Mode:
- A specialized feature designed for headphone usage under DC power supply. Increases static operating current and voltage for enhanced audio performance.
- Balanced: 1000mW + 1000mW at 32Ω; 1170mW + 1170mW at 16Ω
- Single-ended: 420mW + 420mW at 32Ω; 610mW + 610mW at 16Ω
Magnetic Back Design:
- Magnetic rear panel allows seamless attachment to smartphones.
- Includes a custom Cayin leather case - hand-stitched, supple leather, precise cutouts, and magnetic back for secure attachment.
- Comes with a L-shaped USB cable, ergonomically angled to avoid hand obstruction.
Vibration Isolation:
- Custom-designed anti-vibration system for the Nutube vacuum tube.
- Features a custom-built silicon housing on an FPC flexible PCB and a pin-supported vertical suspension system to eliminate microphonics.
Elegant and Compact:
- CNC-machined unibody metal chassis.
- Weighs only 150g, and measures 15mm thick.
Thoughtful Details:
- 0.96" color display with adjustable brightness.
- Knurled volume knob with refined tactile resistance.
- Side-mounted multi-color indicator light for charging and sample rate/format display.
Versatile Use Scenarios:
- USB Audio DAC:
Supports UAC1.0 (driverless) and UAC2.0 modes.
Compatible with smartphones, computers, digital audio players, tablets, and gaming consoles.
- S/PDIF Input/Output:
Uses for Qualcomm QCC5125 for high-definition Bluetooth transmission.
Supports LDAC and other HD Bluetooth codecs.
Specification:
- Product size: 100 x 70 x 15mm
- Net weight: 150g
Package Included:
- 1 x Host