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Introducing the all-new Cayin RU7
Introducing the all-new Cayin RU7, a portable USB DAC/AMP featuring a fully discrete 1-Bit R2R design. Experience pristine sound quality and natural tones when connecting the RU7 to your smartphone, tablet, or laptop/PC. With its fully-balanced resistors network discrete 1-bit DAC, the RU7 supports pure DSD decoding and even offers an All-to-DSD function for music upscaling. Enjoy dual-headphone outputs with 3.5mm single-ended and 4.4mm balanced connections, providing a powerful output of up to 400mW. The RU7 also features line-out support with fixed voltage output. Immerse yourself in captivating soundscapes and elevate your listening experience with this state-of-the-art DAC circuit.
Key Features
Fully Balanced Resistor Networks Discrete 1-Bit DAC for DSD Format
Experience audio excellence like never before with the RU7, Shanling's purpose-built micro-miniaturized 1-bit DAC circuit. Meticulously designed with discrete components, it effortlessly converts digital signals to immersive analog sound through a fully differentiated 4-channel architecture. Featuring a resistor network composed of 128 high precision thin film resistors, this circuit closely resembles the renowned discrete DAC of Shanling's N7 DAP. The output passes through a 3-level active LPF, ensuring pristine audio quality, and then seamlessly converts to a single-ended signal for convenient volume adjustment.
Low Power Consumption Compatible with Common Platforms
Compared to highly integrated DAC chipsets, the discrete resistor network in the RU7 is a low-power DAC circuit, effectively minimizing power drain from the mobile source. Through a redesigned amplification circuit, we have dramatically increased the output power while maintaining the overall power consumption at a range of 100-110mA. This low power consumption feature ensures compatibility of the RU7 with the following audio sources:
– Android based mobile devices
– iOS and iPad OS mobile devices
– macOS computers
– Windows 7/8/8.1/10 computers
– Digital Audio Players with USB
audio output
High Power Parallel Phone Amplifiers
The system features dual amplifiers connected in parallel, delivering a high-power balanced output across four channels. The second amplifier specifically functions as a parallel unity gain inverting phase amplifier. This notable enhancement significantly boosts your phone's output power, providing an impressive upgrade.
3.5mm SE, 160mW @32Ω
4.4mm BAL, 400mW @32Ω
Shared Line Out Conveniently Connected
The shared line-out function allows you to configure the 3.5mm or 4.4mm phone output, bypassing the volume control:
3.5mm Single-ended, 1.2 Vrms
4.4mm Balanced, 2.4 Vrms
The line-out voltage is carefully selected to preserve the intricate details and dynamic range of the 1-bit DAC, minimizing noise and distortion. This enables you to connect the RU7 to portable/desktop amplifiers or home audio systems, utilizing it as a miniature 1-bit DAC.
Discrete Volume Control
The discrete resistor network DAC circuit places high demands on the integrity of incoming data. To ensure the quality of the audio digital signal, we recommend users to keep the digital volume of their mobile phones at full output. In situations where off-the-shelf analog volume options fail to meet the high precision, low noise, and low power consumption requirements of the RU7, we have developed our own discrete resistor network volume control. This unique volume control solution features 100 steps, achieved through 3 segments of resistors and switching relays, providing precise control over a wide volume range, satisfying even the needs of the most sensitive IEM users.
Outstanding Digital Audio Capability with User Selectable All-to-DSD
The RU7 supports PCM up to 384kHz and native DSD from DSD64 to DSD256. Its audio bridge receives different audio formats and undergoes high precision signal enhancement. All digital audio signals are converted to a designated DSD format before being fed to the discrete 1-bit DAC circuit.
An All-Rounder
– The OLED screen on the RU7 boasts a resolution of 128x64 pixels, providing excellent visibility for displaying playback information.
– Featuring a hardware volume button that conveniently doubles as a menu selection button when entering Mode setting.
– Smaller and lighter, with chamfering to enhance its ergonomic feel for an even better and more comfortable grip.
– Boasting smoothly curved surfaces that enhance its aesthetic appeal and tactile experience.
Bundled Protective Case
Indulge in the soft and tender embrace of our handmade magnetic leather case, specifically designed for the RU7. This meticulously crafted case offers a precise cutout, ensuring a snug and protective fit while presenting an elegant aesthetic. Accompanying the case are two circular metal plates with adhesive tape pads for added convenience.
Included components
SuperNova
Reviewed in the United States on January 11, 2025
I compared it with DACs in the multi thousand dollar category. I needed a DAC for travel and it just replaced my desktop rigs.The SQ of this device is amazing. I'm using Audeze, Dan Clark Either 2, Beyer Dynamics Xelento headphones with it. I doubt you can beat the SQ for less than $2K.And yes, I'm a former reviewer for a major US audio magazine.The bottom line: I could not be more pleased. I cannot comment on the technology and engineering other than to say, it must be super!And balanced operation is a major boon.What is there not to like?
Javedan Family
Reviewed in the United States on August 29, 2024
Of note needs a special lightning cable if iPhone is not usb c. Once you get over that limitation. I listen to this with a balanced cable with Shure 535 iems on high gain dsd256 setting. Every time I am absorbed for hours.
CookieCurls
Reviewed in the United States on April 5, 2024
This really surprised me with how much it changes the sound. Usually DACs and amps have little to no differences in sound and are just good for adding extra power if you need it. That’s how it should be. But this really drastically changes the sound. I tried this with 3 different headphones. Sennheiser IE900 IEMs, 64 Audio U4S IEMs, and Meze Elite headphones.For the IE900, it made the sound much darker and added a lot of low end. Which is a bad thing in this case, because the IE900 is already a very bass heavy IEM. This cut out the treble frequencies and made the bass boomy. It was not a good sound.The Meze Elite had a similar affect. But it’s not a bass heavy headphone, quite the opposite actually. Even so, it reduced the treble frequencies and made the headphones sound dead.The 64 Audio U4S however handled the RU7 very differently, and I’m not sure why. The U4S is another extremely bass heavy IEM, and in my opinion sound muffled in the mid highs. The Cayin RU7 actually opened up the treble here. It made the U4S sound much more balanced. Still bass heavy, but the treble was much better, it added crispness and detail. It’s quite a good combo actually.That leaves me unsure of how to review this. Having a DAC / amp that is only good with one of my headphones is not exactly what I was looking for. I’m also not sure how I feel about a DAC coloring the sound so much.
SBF
Reviewed in the United States on September 30, 2023
This Cayin RU7 DAC has absolutely transformed the listening experience of my SE846 IEMs. These IEMs have always sounded good for the 4 years I've owned them, but I had no idea how much better they could have sounded all this time. This DAC drives like a beast and the sound quality is so rich and warm, with a really wide sound stage that I also hear a lot of front to back on good tracks. I always chuckled when I read people say they picked up details they'd never heard before - well, with the same IEMs I've had for years listening to some of the same music, I can now say I hear details I've never heard before. I personally like how the IEMs respond to the balanced vs. single ended output. While either output doesn't seem to change battery life, my only gripe is how thirsty the DAC is - it can pull on the battery on my iPhone 13 at a pretty good clip. I can feel the DAC get a bit warm as I listen to it, and it might just be me, but I actually think the DAC's sound quality improves as it warms up (maybe an ode to this DACs design vs. delta sigma DACs?). With that said, this is an outstanding DAC that's well worth the investment.
Jack
Reviewed in the United States on August 29, 2023
Went through two units, did a replacement after the first unit had noise issues. Second unit, noise issues still present. Listening to "The Night King" on high gain, there was unacceptable levels of hiss and also crackling and EMI noise galore. Quality Control check Cayin? Had such high hopes for this device as I bought it mainly to use as a line-out DAC. Forget about that. Still produced noise even just plugging my IEMs into the device using supplied USB C cable into my iPad Pro. Tried my iPhone and PC as well, other cables. Same story. NOISE! Unreal....
Francisco
Reviewed in Mexico on August 11, 2023
Estoy sin palabras, no esperaba que este pequeño dispositivo cumpliera y superara mis expectativas en cuanto a DACs se refiere (y amplificación). Tengo varios DACs, tanto de escritorio como portátiles y el RU7 les dice quítense que ahí les voy. No necesito nada más para poder disfrutar de todos mis audífonos, no tengo que batallar con frecuencias sibilantes y los bajos que genera son súper placenteros. No busquen más, esto es lo que necesitan tanto para sonido portátil como de escritorio. La salida balanceada es particularmente interesante con mis Sennheiser HD660s y la no balanceada hizo que me enamorara de mis 7Hz Timeless que ya estaban en un cajón porque mis otros dacs no los hacían sonar tan bien como el Cayin RU7. No lo duden, este es el Dongle DAC que los enamorará y los hará querer estar escuchando su música por horas.
luis manuela
Reviewed in the United States on July 8, 2023
Amazing sound! But when you increase and decrease from 49 to 50, 79 to 80 and 99 to 100, the sound goes away for half second.
B. Lee
Reviewed in the United States on June 24, 2023
I went to the MusicTeck store after I ordered W4. Andrew, the owner of MusicTeck, suggested testing the sounds. So, I want to hear the sound before W4 arrives and try RU7 too.The RU7 sound was good as W4 but had a different sound color. I am not an audiophile, so I cannot tell what is exactly different. Both are pleasantly good.I could not get the sound of RU7 out of my year after testing. I ended up ordered RU7 last night.I strongly suggest contact Andrew if you have any questions.
maxi
Reviewed in the United States on December 21, 2023
After a month of daily use with my MacBook Pro & iPhone, I am enjoying this dongle DAC a lot. I tried 2 other less expensive brands that had. very little impact on the music. The RU7 has a volume control and choice of Hz setting. My headphones sound better on the highest setting.The single most important aspect I was interested in, is how this DAC affects low res mp3 files. Surprisingly, it makes mp3s more airy & spacious. Bass is flat, I don't hear a boost, and the treble is very smooth. It took much of the sibilance out of my headphones.All In all, this DAC is worth the extra expense over it's less effective competition.
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