Cayin RU6 Portable USB DAC /Headphone-Amp Dongle featuring a 24-Bit Discrete R-2R Resistor Ladder DAC, user Selectable NOS/OS Digital to Analog Mode and High Precision Resistor Array Volume Control supporting DSD256 and up to PCM 384kHz.
Discrete 24-Bit R-2R Ladder Resistor Network Explained
Cayin RU6 USB DAC Headphone Amplifier has the basic idea of R-2R ladder is a matched pair of two resistors, the first is "R" and the other is "2R" which has twice the value of R.
To achieve 24bit R-2R decoding, Cayin need 48 pieces of resistors (23xR and 25x2R) for one channel, or 96 pieces of high precision resistors for stereo.
R-2R is famous for its natural and realistic sound signature, it'll offer a very different experience to music lovers.
NOS or OS Dual DA Mode
Non-Oversampling:
- Maintain the original sampling rate of the source bitstream.
- Digital filter-less, no post-processing, optimised in time domain, low phase distortion and jitter, no ringing artefact.
- Musical with vivid emotions, sounds natural, organic and coherent.
Oversampling:
- Increases sampling rate (upsampling) through interpolation before DA.
- Enhances resolution, reduces noise and improves anti-aliasing, optimised in frequency domain.
- Impressive details and frequency extension, clean and sharp presentation with darker background.
Discrete Volume Control
R-2R DAC circuit is very demanding on incoming data integrity, the digital volume of mobile phones will damage sound quality badly.
When off-the-shelf volume options cannot meet the high precision, low noise, low power consumption requirements of RU6, Cayin developed their own discrete resistor array volume control.
0-99 steps volume control through 9 segments of resistors and switching relays, meet all the RU6 requirements and transparent to maintain the natural sound signature of R-2R DAC.
Intuitive and Versatile
Hardware volume buttons for convenient control, doubled as menu selection when entering Mode settings.
1" OLED screen displays playback information with good visibility.
3.5mm and 4.4mm phono out to fit your earphone collection.
Ultimate Dual Main Boards Layout
To minimise interference, RU6 circuitry is split into TWO 6-layers PCB, with digital and analogue circuit installed in separate boards.
Safeguard signal integrity, make sure the noise from reference clock and DSP will not bleed into the amplification circuit.
Low Power Consumption Highly Compatible
Discrete R-2R is a low-power DAC circuit when compared to other highly integrated DAC chipset on the market, minimising power drain from mobile sources.
USB Audio with shielded USB-C connector, compatible with a wide range of mobile, consumer electronics and computers.
Cayin RU6 USB DAC Headphone Amplifier is compatible with the following digital audio sources:
- iOS and iPadOS
- macOS computers
- Windows 7/8/8.1/10 computers *
- Android mobiles and tablets
- Digital Audio Players (Requires USB Audio Output support from the DAP)
*Requires to install a proprietary USB Audio 2.0 Driver developed for RU6, free to download from Cayin’s official website.
High Resolution and High Fidelity
High-end digital audio compatibility.
- PCM: supports up to 384kHZ
- DSD: supports DSD64/128/256
Choice of High/Low gain to enhance performance with different IEM or portable friendly headphones.
Cayin RU6 USB DAC Headphone Amplifier
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- £189.99
- £189.99
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Cayin RU6 Portable USB DAC /Headphone-Amp Dongle featuring a 24-Bit Discrete R-2R Resistor Ladder DAC, user Selectable NOS/OS Digital to Analog Mode and High Precision Resistor Array Volume Control supporting DSD256 and up to PCM 384kHz.
Discrete 24-Bit R-2R Ladder Resistor Network Explained
Cayin RU6 USB DAC Headphone Amplifier has the basic idea of R-2R ladder is a matched pair of two resistors, the first is "R" and the other is "2R" which has twice the value of R.
To achieve 24bit R-2R decoding, Cayin need 48 pieces of resistors (23xR and 25x2R) for one channel, or 96 pieces of high precision resistors for stereo.
R-2R is famous for its natural and realistic sound signature, it'll offer a very different experience to music lovers.
NOS or OS Dual DA Mode
Non-Oversampling:
- Maintain the original sampling rate of the source bitstream.
- Digital filter-less, no post-processing, optimised in time domain, low phase distortion and jitter, no ringing artefact.
- Musical with vivid emotions, sounds natural, organic and coherent.
Oversampling:
- Increases sampling rate (upsampling) through interpolation before DA.
- Enhances resolution, reduces noise and improves anti-aliasing, optimised in frequency domain.
- Impressive details and frequency extension, clean and sharp presentation with darker background.
Discrete Volume Control
R-2R DAC circuit is very demanding on incoming data integrity, the digital volume of mobile phones will damage sound quality badly.
When off-the-shelf volume options cannot meet the high precision, low noise, low power consumption requirements of RU6, Cayin developed their own discrete resistor array volume control.
0-99 steps volume control through 9 segments of resistors and switching relays, meet all the RU6 requirements and transparent to maintain the natural sound signature of R-2R DAC.
Intuitive and Versatile
Hardware volume buttons for convenient control, doubled as menu selection when entering Mode settings.
1" OLED screen displays playback information with good visibility.
3.5mm and 4.4mm phono out to fit your earphone collection.
Ultimate Dual Main Boards Layout
To minimise interference, RU6 circuitry is split into TWO 6-layers PCB, with digital and analogue circuit installed in separate boards.
Safeguard signal integrity, make sure the noise from reference clock and DSP will not bleed into the amplification circuit.
Low Power Consumption Highly Compatible
Discrete R-2R is a low-power DAC circuit when compared to other highly integrated DAC chipset on the market, minimising power drain from mobile sources.
USB Audio with shielded USB-C connector, compatible with a wide range of mobile, consumer electronics and computers.
Cayin RU6 USB DAC Headphone Amplifier is compatible with the following digital audio sources:
- iOS and iPadOS
- macOS computers
- Windows 7/8/8.1/10 computers *
- Android mobiles and tablets
- Digital Audio Players (Requires USB Audio Output support from the DAP)
*Requires to install a proprietary USB Audio 2.0 Driver developed for RU6, free to download from Cayin’s official website.
High Resolution and High Fidelity
High-end digital audio compatibility.
- PCM: supports up to 384kHZ
- DSD: supports DSD64/128/256
Choice of High/Low gain to enhance performance with different IEM or portable friendly headphones.
| DAC | Discrete R-2R Resistor Ladder DAC |
| DAC Architecture | Single Ended Circuit Architecture |
| Resistor Specification | 96 PCS 0.1% 25ppm high precision thin Resistor |
| Signal Process | All To PCM |
| Phone Amplifier | Non-parallel 4-channel architecture |
| DAC Sampling | OS and NOS Modes. OS Fixed Sample Rate |
| PCB Design | Dual 6-layer PCB with Digital and Analog Circuit Installed on separate Boards. |
| Gain | Low Gain/High Gain |
| LO | No LO |
| PO | 3.5mm PO/4.4mm PO |
| USB IN Format Supported | Support up to PCM384,DSD256 |
| Display | OLED |
| Hardware and Digital Volume | Discrete Volume Control through 9 segments of resistors and switching Relay |
| PO Power Output | 3.5mm Single Ended 138mW@32Ω 4.4 mm Balanced 213mW@32Ω |
| THD | 3.5mm Single Ended 0.032% 4.4 mm Balanced 0.04% |
| S/N Ration | 3.5mm Single Ended 113dB 4.4 mm Balanced 114dB |
| Dynamic Range | 3.5mm Single Ended 109dB 4.4 mm Balanced 110dB |
| Output Impedance | 3.5mm Single Ended 0.5Ω 4.4 mm Balanced 1.0Ω |
| System Supported | Android Mobile and Tablet, iOS, iPadOS DAP macOS and Windows PC |
| Weight/Size | 28g / 65*25.4*13.7mm |
- Cayin RU6 R-2R USB DAC / Headphone Amplifier
- USB C to USB C Cable (Shielded)
- USB A to USB C Adapter
Item Ships from our UK Warehouse - Typical delivery is 3 - 5 business days for mainland UK.
OTIC can be contacted for updates.
UK ORDERS - Free shipping on all baskets over £250.
We offer a refund on any unused items, subject to our returns policy.
Click here to view all delivery & returns info - including shipping, tax and duty information for International Customers.
Products purchased from OTIC Audio are supplied with a manufacturer warranty that is specified on the product page on our website. Most products come with a 1Y manufacturer warranty (or 3 months for B-grade, open box, refurbished, ex-demo, and second-hand items).
The manufacturer's warranties are limited to physical defects in the materials, parts, and workmanship used in making the product. Abnormal conditions, deliberate abuse, and damage due to accidents, operator's error, or unauthorized service attempts are excluded from any warranty claims.
Faulty goods returned under the manufacturer's warranty are to be returned to OTIC Audio at the cost of the customer. OTIC Audio will cover the cost of shipping the repaired or replacement product back to the customer.
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