Cayin

Cayin - RU6

Portable R-2R DAC & Amp With USB-C Connection

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    Tenure Interest% Installment Interest
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    Tenure Interest% Installment Interest
    3 14% ₹ 8,187 ₹ 562
    6 14% ₹ 4,165 ₹ 989
    9 14% ₹ 2,825 ₹ 1,422
    12 14% ₹ 2,155 ₹ 1,859
    18 14% ₹ 1,486 ₹ 2,747
    24 14% ₹ 1,152 ₹ 3,655
    Tenure Interest% Installment Interest
    3 13% ₹ 8,174 ₹ 522
    6 13% ₹ 4,153 ₹ 918
    9 14% ₹ 2,825 ₹ 1,422
    12 14% ₹ 2,155 ₹ 1,859
    18 15% ₹ 1,497 ₹ 2,950
    24 15% ₹ 1,164 ₹ 3,928
    Tenure Interest% Installment Interest
    3 13% ₹ 8,174 ₹ 522
    6 13% ₹ 4,153 ₹ 918
    9 13% ₹ 2,813 ₹ 1,319
    12 13% ₹ 2,144 ₹ 1,723
    18 15% ₹ 1,497 ₹ 2,950
    24 15% ₹ 1,164 ₹ 3,928
    Tenure Interest% Installment Interest
    3 13% ₹ 8,174 ₹ 522
    6 13% ₹ 4,153 ₹ 918
    9 15% ₹ 2,836 ₹ 1,525
    12 15% ₹ 2,166 ₹ 1,994
    18 15% ₹ 1,497 ₹ 2,950
    24 15% ₹ 1,164 ₹ 3,928
    Tenure Interest% Installment Interest
    3 15% ₹ 8,200 ₹ 602
    6 15% ₹ 4,177 ₹ 1,061
    9 15% ₹ 2,836 ₹ 1,525
    12 15% ₹ 2,166 ₹ 1,994
    18 15% ₹ 1,497 ₹ 2,950
    24 15% ₹ 1,164 ₹ 3,928
    Tenure Interest% Installment Interest
    3 12.50% ₹ 8,167 ₹ 502
    6 12.50% ₹ 4,147 ₹ 883
    9 13.50% ₹ 2,819 ₹ 1,370
    12 13.50% ₹ 2,149 ₹ 1,791
    18 13.50% ₹ 1,480 ₹ 2,646
    Tenure Interest% Installment Interest
    3 12.99% ₹ 8,173 ₹ 521
    6 13.99% ₹ 4,165 ₹ 989
    9 13.99% ₹ 2,824 ₹ 1,421
    12 13.99% ₹ 2,155 ₹ 1,857
    18 14.99% ₹ 1,497 ₹ 2,948
    24 14.99% ₹ 1,164 ₹ 3,925
    Tenure Interest% Installment Interest
    3 13% ₹ 8,174 ₹ 522
    6 13% ₹ 4,153 ₹ 918
    9 13% ₹ 2,813 ₹ 1,319
    12 12% ₹ 2,132 ₹ 1,588
    18 12% ₹ 1,464 ₹ 2,344
    24 12% ₹ 1,130 ₹ 3,114
    Tenure Interest% Installment Interest
    3 12% ₹ 8,160 ₹ 482
    6 12% ₹ 4,141 ₹ 847
    9 14% ₹ 2,825 ₹ 1,422
    12 14% ₹ 2,155 ₹ 1,859
    18 15% ₹ 1,497 ₹ 2,950
    24 15% ₹ 1,164 ₹ 3,928
    Tenure Interest% Installment Interest
    3 13% ₹ 8,174 ₹ 522
    6 14% ₹ 4,165 ₹ 989
    9 15% ₹ 2,836 ₹ 1,525
    12 15% ₹ 2,166 ₹ 1,994
    18 15% ₹ 1,497 ₹ 2,950
    24 15% ₹ 1,164 ₹ 3,928
    Tenure Interest% Installment Interest
    3 14% ₹ 8,187 ₹ 562
    6 14% ₹ 4,165 ₹ 989
    9 14% ₹ 2,825 ₹ 1,422
    12 14% ₹ 2,155 ₹ 1,859
    Tenure Interest% Installment Interest
    3 13% ₹ 8,174 ₹ 522
    6 13% ₹ 4,153 ₹ 918
    9 14% ₹ 2,825 ₹ 1,422
    12 14% ₹ 2,155 ₹ 1,859
    Tenure Interest% Installment Interest
    3 13% ₹ 8,174 ₹ 522
    6 13% ₹ 4,153 ₹ 918
    9 14% ₹ 2,825 ₹ 1,422
    12 14% ₹ 2,155 ₹ 1,859
    18 15% ₹ 1,497 ₹ 2,950
    24 15% ₹ 1,164 ₹ 3,928
  • Get GST invoice and save up to 18% on business purchases Info

    Get 18% GST input

    One of the reasons headphones and earphones in India are more expensive than overseas is because of the Goods & Services Tax in India. Don't let the GST input go to waste especially if you can avail an offset. All products sold on Headphone Zone carry a GST compliant invoice and all products sold include an 18% GST. Simply enter your GST number at the time of checkout.
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All products are covered by the Headphone Zone 7 Day Replacement Guarantee. This product is eligible for a free replacement in case you receive a damaged, defective or different item.

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1 Year Manufacturer's Warranty Info

Warranty & Service

This product is covered by Cayin's 1 Year Warranty against manufacturing defects. The Authorised service partner for all warranty claims in India is Headphone Zone.
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Chi-Fi
Excellence

1 Year of
Warranty

Ideal for
Audiophiles

Best Suited for
Portable Use

4.4mm
Balanced Output

Metal
Build

R-2R Resistor Ladder
DAC Chip

Pair with Laptop
via USB-C

Connect With
USB-C

Upto 213mW @ 32Ω
Power Output

Volume
Controls

Super Lightweight
Design

An R2R DAC, is pretty much the buzzword of the year. Everyone wants one. But most are incredibly expensive, and need a big fat setup. The Cayin RU6 is set to change that. Pocket-sized, on the go, R2R goodness for everyone.
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RAGHAV SOMANI

Headphone Guru Info

About Raghav Somani

Raghav Somani is the Founder & CEO of Headphone Zone. An avid audiophile and musician since 2008, his choice of headphones include STAX Electrostats, Audeze LCD 3, and for music on the go, the JH Audio Roxanne + Astell&Kern SP1000 is never too far away. On his playlist, you'll find A.R. Rahman, Michael Jackson, and the Eagles.


DESCRIPTION

INNOVATIVE 24BIT DISCREET R-2R RESISTOR LADDER DAC CIRCUIT

The Cayin RU6 features a self-developed 24bit discrete R-2R resistor ladder circuit that can decode up to 384kHz PCM audio. The basic idea of the R-2R ladder is a matched pair of resistors, the first is “R” and the other is “2R'' which has twice the value of R. To achieve 24 bit decoding, RU6 equips 48 units of resistors (23 x R and 25 x 2R), and that’s for one channel. So for a stereo 24 Bit R-2R decoder, RU6 features 96 units of resistors for life-like audio reproduction. With the advent of the R-2R circuit, Cayin RU6 establishes itself as master of the fully-discrete resistor DAC topology in portable audio.

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OFFERING OVERSAMPLING AND NON-OVERSAMPLING DA MODES

Cayin offers both Oversampling and Non-oversampling DA modes in RU6. For Oversampling mode, the Digital Audio Bridge will upsample the digital audio data to 384kHz through digital filters. This will enhance the resolution, reduce noise and improve the anti-aliasing of the digital signal. The Oversampling DA mode will offer a noticeable improvement on details and frequency extension. The playback is clean and sharp with a darker background. On the other hand, NOS DA mode maintains the sampling rate of the original bit-stream and playback will become very musical with a natural and organic presentation.

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EQUIPPED WITH FULLY ANALOGUE RESISTOR ARRAY VOLUME CONTROL

Most USB DAC/Amps will rely on the volume control of your mobile phone to control the volume of the headphone output. Technically this was not a viable solution to Cayin RU6. Understanding this issue, Cayin developed a fully analogue resistor array volume control circuit that provides 99 steps volume control through 9 segments of resistors and switching relays. Resistor Array volume control features a very high-quality volume control design, extremely transparent when implemented correctly and it is found in a lot of high-end preamps and integrated amplifiers.

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FEATURING DUAL CIRCUIT BOARD LAYOUT FOR DSD AND PCM PLAYBACK

To minimise audio signal interference, Cayin has split the RU6's circuit into two 6-layers PCB, with digital and analogue circuits installed on separate boards. This safeguards the audio signal integrity and ensures the noise from the reference clock and DSP do not bleed into the amplification circuit. This architecture in turn delivers artefact free audio every single time. This circuit design combined with the R-2R architecture enables the RU6 to support hi-resolution PCM and DSD audio formats with support for 384kHZ PCM and DSD 64/128/256 natively.

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INTUITIVE AND VERSATILE OPERATION WITH LOW POWER CONSUMPTION

Discreet R-2R circuitry is a low power DAC circuit when compared to other highly integrated DAC chipsets. This architecture minimises power drain from the mobile source allowing you to enjoy music without the need to worry about battery drain. USB-C connection offers compatibility with a wide range of phones, consumer electronics and computers. The hardware has been designed in an intuitive manner, where the volume buttons double as menu selectors and the OLED screen displays playback information accurately. The Cayin RU6 also offers two gain settings to enhance performance with various IEMs and headphones. All this is wrapped in a 28g package.

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SPECS

PRODUCT INFORMATION
DAC 24bit Discrete R-2R
HEADPHONE 3.5mm + 4.4mm Balanced
USB Type C USB Audio Input
DISPLAY 0.96 inch 128x64 OLED
DIGITAL DECODING PCM: 44.1kHz ~ 384kHz
DSD: DSD64/128/256
CONTROL Volume +/-, Mode
DIMENSION 65mm x 25.4mm x 13.7mm
CHASSIS CNC Aluminum
NET WEIGHT ~28g
RU6 HEADPHONE OUTPUT (OS MODE)- 3.5MM
POWER RATING 138mW @ 32Ω
FREQUENCY RESPONSE 20Hz-20kHz (±0.5dB)
THD+N 0.032% (1kHz, Output: 0.5V)
DYNAMIC RANGE 109dB (20Hz-20kHz, A-Weighted)
SNR 113dB (20HZ-20kHz, A-Weighted)
OUTPUT IMPEDANCE 0.5Ω
RU6 HEADPHONE OUTPUT (OS MODE)- 4.4MM
POWER RATING 213mW @ 32Ω
FREQUENCY RESPONSE 20Hz-20kHz (±0.5dB)
THD+N 0.04% (1kHz, Output: 1V)
DYNAMIC RANGE 110dB (20Hz-20kHz, A-Weighted)
SNR 114dB (20HZ-20kHz, A-Weighted)
OUTPUT IMPEDANCE 1.0Ω
IN THE BOX
BOX CONTENTS 1. Cayin RU6
2. USB C to C cable (shielded)
3. USB A to C adapter

FAQs

Warranty & MEDIA REVIEWS

1 Year Warranty

Don't sweat it, this Cayin RU6 comes with a 1 year warranty from Cayin that covers manufacturing defects. All products featured on Headphone Zone are backed by an original manufacturer's warranty.

Read more about Cayin's warranty in India.

YouTube Reviews

Watch the most popular YouTube reviews for the Cayin - RU6

Customer Reviews

Based on 6 reviews
67%
(4)
33%
(2)
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0%
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S
Samrat Ganguly (Baharampur)
Design and Comfort:
Sound Quality:
Value for Money:
One of the best dongle dac

Hi all
I bought cayin RU6 because I wanted to test the R2R technology.
The dongle is very well built. The type C poty, the chasis, the SE and balanced ports look premium. The matte finish of sides and back, glass front, the metallic line along the sides - all look very good. This is a sturdy device. The buttons are kept at horizontal orientation to the sides rather than conventional parallel orientation. They work perfectly.

Connection was easy. Just plug and play.

Setting- three settings. Gain - high/ low, sampling - OS/ NOS. OS is oversampling, which makes the sound slightly warm and add more flavor to it. NOS is slightly boring but detailed. Last is screen backlight timing. These can be changed just like looto paw.

Sound- Accurate and lively. Details- its NOT one of the most detailed dongle DAC. That accolade belongs to Looto paw s1 and L&P W2.
Soundstage- definitely one of the largest, if not the largest among dongle dacs.
Localisation- average. Sound notes mix together and less separation among instruments. So pin point accuracy of instruments on soundstage not possible.
Highs- they are well represented.
Mids- Lush and full vocals. Both male and female vocals feel very good. Its not mid-forward presentation but gives perfect representation.
Bass- very good, solid bass with good sub-bass and reverbs. Not the fastest like A&K dongle. But still very well regulated. Slight bass bleed to the mids.
Power- good for iems. Not for power hungry cans but its understandable.

Tonality- here W2 and DAPs like ibasso dx160 and m11 plus are slightly ahead. Overall very good DAP like tonality compared to many other dongle dacs available in market.
Timbre of instruments- its accurate and lifelike

Competition- L&P W2 is priced similarly. Both are good. W2 slightly ahead in SQ but background noise in W2 is more while streaming.
Its ahead of looto paw S1 and A&K dongle in terms of tonality and presentation.

Overall verdict- if you wamt to experience R2R technology, this thing doesn't disappoint. Good organic warm sound with good technical capabilities. It'll be among top 5 dongle DACs definitely.

Hi Samrat,
We are so happy you took out time & elaborately reviewed the product with a comparison. We are sure this will help our customers to make an even better & informed decision.

V
VENKATA (Mumbai)
Design and Comfort:
Sound Quality:
Value for Money:
Excellent USB DAC

Tried with both IOS ( iphone 11) and android LG G8x.
Initial impressions: no regrets
Probably the best usb dac in market right now.

Currently using - Earmen sparrow and LP W2. This is definitely a good addition to them

Using to drive primarily IER Z1R , UM MEST MKii , IMR EDP+

Excellent tonality and bass. Widest sound stage you can get through a USB DAC till now.

Really impressed. As many say it requires some burn in, hope it may open up better and settle on treble.

H
Harisankar (Ernakulam)
Design and Comfort:
Sound Quality:
Value for Money:
Immersive, Natural and Detailed

Pros
1) Natural sound signature that is forgiving of even low resolution mp3 files but scales well with hires files.
2) Quite holographic soundstage and good imaging capabilities
3) Very dynamic sound signature with great bass thump and impact
4) Treble is detailed but not sibilant or overly sharp
5) The least expensive R2R Dac out there in the market
6) Powerful enough for almost any iem in the market

Cons
1) Not a truly balanced circuit despite the 4.4mm port
2) Rare instances of EMI interference noises
3) Volume changes can sometimes be a bit slowdue to the switching relay resistor volume control

My Setup
Smartphone: Oneplus7Pro
Apps used: USB Audio Player Pro (bit-perfect playback with Tidal and Qobuz integration), YouTube vanced, Apple Music
Iem used: 7hz Timeless through the 4.4mm port

First of all thanks to Headphonezone for bringing this unique product to the Indian market. The USP of this product is that this is the world’s first R-2R Dac in dongle format. R-2R Dacs are generally known for their more natural sound signature and huge difficulty involved in engineering one correctly as precise resistors have to be hand selected and arranged in ladder format. This Cayin RU6 uses 96 precise resistors in ladder form for 2 channel audio.

The combo of Cayin RU6 plus 7hz Timeless produces a highly dynamic, engaging, and wide sound signature. The naturalism of the R-2R Dac especially helps in adding more midrange lushness to the sound signature of the 7hz Timeless compared to my Hiby R3 Pro Sabre Delta Sigma-based DAP which I used earlier. The soundstage also gained a more holographic nature with the Cayin RU6 compared to the Hiby. Songs such as ‘Thriller’by Michael Jackson, ‘Jack Sparrow’ by Royal Philharmonics Orchestra as well as ‘Doors and Distance’ by Antonio Sanchez illustrate the soundstage capabilities of the RU6. ‘Chali Kahani’ from Tamasha gives a clear illustration of the great dynamics of RU6.

A note on value for money: This is priced at the Summit Fi range of dongle dacs at the moment and encroaches upon the price category of a Mid-Fi Dap such as Shanling M3X. I would say that for anyone ok with carrying a dongle with their smartphone, RU6 is a great value for money product especially when you consider the high-end and niche tech inside as well as the highly natural and engaging replay of music offered by the RU6.

S
Salil Mohammad
Pocket-sized but packed with a punch

So, let me start by saying that Cayin is a pioneer in making audiophile geeky sorta gear. This little guy lets you switch between 2 modes making it super convenient. The screen is super clear, conveys information perfectly fine.

Hey Salil, thank you for the great review. Absolutely delighted to read you are loving this!

G
Gajendra Bhatt
Absolutely hooked

The Cayin RU6 is equipped with an R-2R DAC that is in producing a really natural sound. It’s extremely small & easy to use so no complaints there. The player also lets you switch from (NOS) to oversampling mode easily scrubbing any last bit of distortion. A cherry on the cake is that this dongle is backed up by a low power volume control solution. Thank you headphone zone for the fast delivery!!

Happy to know you are loving the RU6 Gajendra. Hope it was a comfortable shopping experience. Cheers!

Y
Yash Shah
Awesome

R2R DAC in such a small form factor is insane. It sounds incredible. In the space of compact dongle DAC the RU6 definitely shines and provides insane value for money.

Thank you for the awesome reviews & ratings Yash!

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