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Cayin

Cayin - RU7 (Unboxed)

Portable Discrete 1-Bit DAC & Amp
Sale price₹ 19,999 Regular priceMRP: ₹ 28,999
Sold out
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Unboxed units are as good as new products with the product's packaging being unavailable. These products give you the same satisfaction of new products - but at down-to-earth prices. Usually, the product's packaging may have gotten damaged in transit. Customers use a product once or twice and then return it with opened up packaging.

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Returned headphones are fully functional products that have left the warehouse and therefore can no longer be sold as new as their packaging has been opened. The product may have been used once or twice by the customer who returned it.

Transit Damages

Sometimes we receive headphones in damaged packaging due to shipping accidents. These are brand new headphones with cosmetic flaws on the packaging.



Save Upto 15%

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Professionally Inspected

A thorough inspection means you receive a 100% working headphone with no sound output issues.

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All unboxed headphones carry the same warranty period as a brand new headphone would.

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All Original Accessories

The unboxed headphones itself comes with all original accessories.

Sets A New Benchmark For An Ultra-Portable DAC & Amp

Cayin is committed to creating the best audio gear and distributing Hi-Fi products. Cayin's audio devices have distinct cultural overtones and fall within a broad pricing range. One such product that was well ahead of its time, the RU6, now gets an upgrade in the form of RU7. It is a USB-powered ultra-portable 1-Bit Resistive Ladder DAC and amplifier.

Discrete 1-Bit DAC With Fully Balanced Resistor Networks

Cayin designed a micro-miniaturized 1-Bit DAC circuit from discrete components to convert digital signal to analogue signal through a fully differentiated 4-ch DAC architecture. A resistor network composed of 128 pieces (4 x 32) of high-precision thin film resistors makes up the 1-Bit DAC circuit. Cayin's well-liked N7 Digital Audio Player has the same design architecture. After going through a 3-level active LPF, the resistor network's output will be changed to a single-ended signal for volume adjustment. The film resistor offers 0.1% high precision and the Temperature coefficient of resistance is 25 ppm/°C.

Discrete 1-Bit DAC With Fully Balanced Resistor Networks

Cayin designed a micro-miniaturized 1-Bit DAC circuit from discrete components to convert digital signal to analogue signal through a fully differentiated 4-ch DAC architecture. A resistor network composed of 128 pieces (4 x 32) of high-precision thin film resistors makes up the 1-Bit DAC circuit. Cayin's well-liked N7 Digital Audio Player has the same design architecture. After going through a 3-level active LPF, the resistor network's output will be changed to a single-ended signal for volume adjustment. The film resistor offers 0.1% high precision and the Temperature coefficient of resistance is 25 ppm/°C.

High Precision Signal Enhancement

It has excellent digital audio capabilities with user-selectable All-to-DSD available with the Cayin RU7. It supports native DSD from DSD64 to DSD256 (Direct Stream Digital) and PCM (Pulse Code Modulation) up to 384kHz. Its Audio Bridge will receive various audio formats and undergo highly accurate signal amplification. Before being fed to the discrete 1-Bit DAC circuit, all-digital audio signals are converted to the specified DSD format (DSD64, DSD128 or DSD256).

High Power Dual Parallel Amplifiers

Cayin has designed the amplification circuitry with dual amplifiers in parallel, providing 4-CH high power Balanced driven output. The second phone amplifier is a parallel unity gain inverting phase amplifier. You get an impressive upgrade in phone output power with 3.5mm SE, 160mW @32 Ohms, 4.4mm BAL, 400mW @32 Ohms.

Shared Line-Out Functionality

The shared line-out function will configure the 3.5mm or 4.4mm phone output into fixed voltage output (bypassing volume control): 3.5mm SE, 160mW @32 Ohms, 4.4mm BAL, 400mW @32 Ohms. The line out voltage is carefully selected to retain as much detail and dynamic of the 1-Bit DAC with minimum noise and distortion. This functionality enables you to connect the RU7 to a portable/desktop amplifier or home audio system and use it as a miniature 1-Bit DAC.

Discrete Volume Control For Precise Adjustment

Discrete Resistor Network DAC circuit is very demanding on incoming data integrity Cayin recommends keeping the digital volume of mobile phones at maximum output to safeguard the quality of the digital audio signal. Cayin has developed its discrete resistor network volume control with 100 steps volume control. This design is done through 3 segments of resistors and switching relays, offering precise control over a volume range, satisfying even the need of the most sensitive IEM users. The segment ranges from Segment 1: 1-49, Segment 2: 50-79, and Segment 3: 80-100.

Dual 6-Layer PCBs Minimise Interference

RU7's circuitry is split into dual 6-layer PCB, with digital and analogue circuits installed in separate boards to minimise interference. This design architecture safeguards signal integrity, making sure the noise from the reference clock and DSP will not bleed into the amplification circuit.

Compatible with Common Platforms & Devices

A discrete resistor network is a low-power DAC circuit when compared to other highly integrated DAC chipsets, minimises power drain from a mobile source. Redesigned amplification circuit increases output power dramatically while maintaining the overall power drain at 100-110mA. Low power consumption allows RU7 to be compatible with the following digital audio sources: Android-based mobile devices, iOS and iPad OS mobile devices, macOS computers, Windows 7/8/8.1/10 computers, and Digital Audio Players with USB Audio output.

High Precision Signal Enhancement

It has excellent digital audio capabilities with user-selectable All-to-DSD available with the Cayin RU7. It supports native DSD from DSD64 to DSD256 (Direct Stream Digital) and PCM (Pulse Code Modulation) up to 384kHz. Its Audio Bridge will receive various audio formats and undergo highly accurate signal amplification. Before being fed to the discrete 1-Bit DAC circuit, all-digital audio signals are converted to the specified DSD format (DSD64, DSD128 or DSD256).

High Power Dual Parallel Amplifiers

Cayin has designed the amplification circuitry with dual amplifiers in parallel, providing 4-CH high power Balanced driven output. The second phone amplifier is a parallel unity gain inverting phase amplifier. You get an impressive upgrade in phone output power with 3.5mm SE, 160mW @32 Ohms, 4.4mm BAL, 400mW @32 Ohms.

Shared Line-Out Functionality

The shared line-out function will configure the 3.5mm or 4.4mm phone output into fixed voltage output (bypassing volume control): 3.5mm SE, 160mW @32 Ohms, 4.4mm BAL, 400mW @32 Ohms. The line out voltage is carefully selected to retain as much detail and dynamic of the 1-Bit DAC with minimum noise and distortion. This functionality enables you to connect the RU7 to a portable/desktop amplifier or home audio system and use it as a miniature 1-Bit DAC.

Discrete Volume Control For Precise Adjustment

Discrete Resistor Network DAC circuit is very demanding on incoming data integrity Cayin recommends keeping the digital volume of mobile phones at maximum output to safeguard the quality of the digital audio signal. Cayin has developed its discrete resistor network volume control with 100 steps volume control. This design is done through 3 segments of resistors and switching relays, offering precise control over a volume range, satisfying even the need of the most sensitive IEM users. The segment ranges from Segment 1: 1-49, Segment 2: 50-79, and Segment 3: 80-100.

Dual 6-Layer PCBs Minimise Interference

RU7's circuitry is split into dual 6-layer PCB, with digital and analogue circuits installed in separate boards to minimise interference. This design architecture safeguards signal integrity, making sure the noise from the reference clock and DSP will not bleed into the amplification circuit.

Compatible with Common Platforms & Devices

A discrete resistor network is a low-power DAC circuit when compared to other highly integrated DAC chipsets, minimises power drain from a mobile source. Redesigned amplification circuit increases output power dramatically while maintaining the overall power drain at 100-110mA. Low power consumption allows RU7 to be compatible with the following digital audio sources: Android-based mobile devices, iOS and iPad OS mobile devices, macOS computers, Windows 7/8/8.1/10 computers, and Digital Audio Players with USB Audio output.

Bespoke Protective Case

The RU7 comes with a handmade magnetic leather case made of soft leather. A tight-fitting protective cutout specifically made for RU7 provides an elegant presentation. Additionally, two spherical metal plates with adhesive tape pads are included in the package.

Type-C Cable

This high-quality cable can be used to connect it to your mobile devices. It is made of high-purity materials enabling lossless signal transmission.

USB-A to USB-C Adapter

This adapter allows you to use the included Type-C cable to connect to your PCs and other sources.

All You Need To Know About The Cayin RU7

DAC
Fully Balanced Resistor Networks
Discrete 1-Bit DSD DAC
Headphone Output
3.5mm Single-Ended
4.4mm Balanced
Microphone Passthrough
Not Supported
Digital Decoding
In: PCM 44.1kHz ~ 384kHz
DSD64/128/256
Native
Display
Chassis
0.96 inch 128x64 OLED
CNC Aluminum
HO Power Rating
3.5mm (SE): 160mW @32Ω
4.4mm (Bal): 400mW @32Ω


Other Details

Generic Name Headphone Amplifier
Country Of Origin China
Importer Details Importers Name: Ferrari Video
Address: 63/18, 1st Main Road, Gandhi Nagar, Chennai - 600020
Contact No: 044-24420733
Net Quantity 1


1 Year Warranty

Don't sweat it, this Cayin - RU7 (Unboxed) 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.

Elevating Hi-Fi Experiences Since 1993

Founded in 1993, Zhuhai Spark Electronic Equipment Co., Ltd. has been dedicated to perfecting audio equipment under the brand name Cayin. With a commitment to delivering top-notch Hi-Fi products, Cayin embeds cultural richness into its audio range, catering to diverse budgets to make premium music experiences accessible. From tube amplifiers and CD players to speakers, Cayin maintains a consistent benchmark of quality, ensuring a compelling price-to-performance ratio across its offerings.

In 2013, Cayin expanded its horizons into personal audio, unveiling a line of Digital Audio Players (DAP) and desktop audio products. The brand further diversifies its portfolio with portable audio products, including amplifiers and in-ear monitors, empowering users with a broad spectrum of audio choices.

Explore Collection
Discrete 1-Bit DAC architecture is typically found on heavy-duty setups. RU7 packs all these in a compact form factor and has seen improvements when compared to its predecessor, the RU6. It's an incredible DAC if you are someone who prefers pure analogue sound.

RAGHAV SOMANI

HFN Recommended
Headfonia
July, 2023
The additional balanced output power, the technical capability, and several All-To-DSD modes are just some of the key features that elevate and differentiate the RU7 from its peers and the competition.
The Cayin RU7 has a tuning which is more to the neutral side, but with its full body and powerful, controlled bass impact, it is a very musical and engaging DAC/AMP dongle. Cayin has certainly set the bar very high.
With a smooth, rich and musical tonality, RU7 is also the most versatile dongle I've used with the selection of high-end IEMs in my collection. Highly recommended.
With these additional features, extra power, and excellent sound quality, a dongle like RU7 can be a real competitor to most of the entry level and some mid-fi level DAPs.
Having listened to at least 40 with a wide range of IEMs and headphones over the past 4 years, the Cayin RU7 makes a very strong case for itself and especially at its asking price.
Cayin’s RU7 continues the company’s hot streak of breaking new ground in DAC design for the dongle format, the all-new 1-bit DAC in the RU7 is even more impressive than the R2R DAC in its predecessor.

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