$329.95
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Estimated free shipping transit time
- Greater Toronto Area: 1-2 business days
- Rest of Ontario: 2-3 business days
- Quebec: 2-3 business days
- Maritimes, Manitoba: 3-4 business days
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- British Columbia: 5-6 business days
- Territories: 6-10 business days
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Find our entrance on Bay Street, near Charles Street West. We also have a pickup area in the Manulife Centre parking garage. Click here for directions. Before coming to the store, please wait for a confirmation email indicating your order is ready for pickup.
⚠️ No Returns on Headphones Once Opened
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For hygienic reasons, there are no returns on headphones and earphones once opened.
All in-stock headphones are available for personal demonstration in-store. We encourage you to try before buying to ensure satisfactory sound, fit, and functionality.
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Description
Cayin RU9
Portable Nutube DAC & AMP
Tube Warmth On the Go
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.
- Dual AK4493SEQ DACs with upgraded VELVET SOUND technology
- Korg NuTube 6P1 for warm analog tube sound
- Three Timbre Modes: Classic Tube, Modern Tube, Solid State
- PCM up to 32bit/768kHz, Native DSD512 decoding
- Bluetooth 5.1 with LDAC, AptX HD, AptX LL
- USB DAC with XMOS XU316 16-core processor
- Balanced and single-ended headphone output (4.4mm + 3.5mm)
- 1W output in Hyper Mode
- Four-channel JRC NJW1195A electronic volume control
- Magnetic back panel + leather case included
Classic. Modern. Solid-State.
The RU9 offers users three distinct timbre options: Classic, Modern and Solid-State. As the name implies, the Classic tube mode delivers a warm, nostalgic sonic flavour — the classic tube sound.
The Modern tube timbre yields a sweet, clear and delicate modern tube sound signature. It's harmonically cleaner, offering a quieter background while preserving the warmth of tubes.
The Solid-State mode is ideal for listening to music with its original, uncoloured character. It delivers neutral tonality, fast transients and highly accurate audio reproduction.
NuTube 6P1 Application
The tube circuit adopts a three-stage amplification architecture, consisting of 6 Toshiba 2SK209 audio-specific junction field effect transistors (JFETs) and a manually tested paired KORG Nature 6P1 dual triode tube. Both the single-ended and balanced ports on the RU9 can output rich tube sound.
Premium Components
With years of experience crafting high-end audio equipment, Cayin has applied their expertise to engineer the RU9 with exceptional components. RU9 is equipped with dual Equipped with dual AK4493SEQ DACs, each operating in mono mode. The Left and right channels are decoded separately for lower crosstalk and better channel separation.
Employing the latest generation XMOS XU316 USB processor, RU9 supports native DSD512 and 32bit/768kHz PCM signals. The processed signal is then amplified by a four-channel balanced headphone amplifier circuit. It uses dual ultra-low noise and ultra-low distortion OPA1662 OPAMPs with four Nexperia audio power tubes.
Triple Power Supply Modes
The built-in 2000mAh lithium battery offers up to 4.7 hours of playback on a single charge. The RU9 also supports USB power directly from connected devices (bypassing the battery), as well as an external DC power supply for enhanced output performance. It is fully compatible with QC and PD fast charging standards.
Hyper Mode
A specialized feature designed for headphone usage under DC power supply. It increases static operating current and voltage for enhanced audio performance. Producing a strong output, it reaches 1000mW at 32Ω impedance load.
Versatile Use Scenarios
The RU9 is compatible with smartphones, computers, digital audio players, tablets and gaming consoles. A magnetic rear panel allows seamless attachment to smartphones. RU9 supports UAC1.0 (driverless) and UAC2.0 modes.
Vibration Isolation
A custom anti-vibration system was designed for the NuTube vacuum tube. It features silicon housing on a FPC flexible PCB and a pin-supported vertical suspension system to eliminate microphonics.
Thoughtful Details
RU9 features a 0.96" color display with adjustable brightness, knurled volume knob and side-mounted indicator light for charging + sample rate/format display.
Specs
Dimensions
About Cayin
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