Cayin - RU7 (Unboxed)

Portable Discrete 1-Bit DAC & Amp

Sale price₹ 22,999 Regular priceMRP: ₹ 28,999
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Chi-Fi
Excellence

1 Year of
Warranty

Ideal for Audiophiles

These DAC & Amps are designed for discerning music lovers. If audio quality is important to you, a set of DAC & Amps like these would be ideal.


You can expect these DAC & Amps to present you with a refined listening experience. The audio quality exhibited by these DAC & Amps is a beautiful mix of musicality, technical brilliance and high precision.


These DAC & Amps deliver a spacious & open soundstage that makes you feel you are sitting at a live concert. Experience the magic and delve into pure sonic tranquility!


Best Suited for Portable Use

For those who value them, being able to carry their favourite DAC & Amp equipment when they are on the move is invaluable.


These DAC & Amps offer the ultimate portability experience without sacrificing sound quality. If you’re someone who appreciates cutting-edge engineering, quality sound and portability, then look no further.


Designed to be trusty companions, these DAC & Amps are cleverly engineered with the latest technology to offer the ultimate combination of portability & Hi-Fidelity!


4.4mm
Balanced Output

Discrete 1-Bit DSD
DAC

Pair with Laptop via USB

A majority of people use a laptop as the primary source device to listen to music or watch movies. Since the laptop is an essential part of the audio chain there are headphones and devices designed to work a laptop or computer system flawlessly. With the availability of USB connectivity, it becomes easier to pair various devices like an Amp, DAC or even headphones without worrying about drivers or any additional piece of software.


Upto 400mW @32Ω
Power Output

Connect With
USB-C

Metal
Build

Volume Controls

If your DAC & Amps include volume controls or volume rockers, you can easily change the volume with a button press or volume knob turn.


DAC & Amps that have volume controls make its operation incredibly simple; turn up the volume on your smartphone or your source devices and then change the volume on DAC & Amps to the desired level.


This design feature allows you to have complete control over the desired volume according to your listening preferences.


Headphone Zone Certified Unboxed Units

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.

Customer Returns

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%

Since you won't get the original packaging, we give you a good discount compared to a new headphone.

Professionally Inspected

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

Original Warranty

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

Unbiased Customer Service

We have the same Headphone Zone customer support experience for Unboxed Products or new products.

Unchanged Replacement Policy

Received a defective Unboxed unit? Return it under our Replacement Policy.

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.

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.

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.

OLED Screen Display & Hardware Volume Controls

All surfaces are smoothly curved to enhance the look and feel of the RU7. The small and lighter chamfering is done for better handling. The 128*64 pixel OLED screen displays playback information with good visibility displaying all relevant information. The hardware volume button conveniently controls volume and acts as a menu selection button when entering the mode setting.

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.

OLED Screen Display & Hardware Volume Controls

All surfaces are smoothly curved to enhance the look and feel of the RU7. The small and lighter chamfering is done for better handling. The 128*64 pixel OLED screen displays playback information with good visibility displaying all relevant information. The hardware volume button conveniently controls volume and acts as a menu selection button when entering the mode setting.

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 C adapter

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

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

Founder, Headphone Zone

All You Need To Know About The Cayin RU7

Box Contents

WHAT YOU WILL GET
1. Cayin RU7 Dongle DAC
2. Type-C Cable
3. USB A to C Adapter
4. User Manual
5. RU7 Protective Case
WHAT YOU WILL NOT GET
1.Original Packaging of Cayin RU7

DAC

Fully Balanced Resistor Networks
Discrete 1-Bit DSD DAC

Phone Out
Line Out

3.5mm Single-Ended (Shared)
4.4mm Balanced (Shared)

USB

Type C: USB Audio Input

Digital Decoding

In: PCM 44.1kHz ~ 384kHz
DSD64/128/256
Native



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.

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