Cayin RU9 Mobiler USB DAC Dongle

Cayin RU9 Mobiler USB DAC Dongle

The Cayin RU9 is a USB DAC and headphone amplifier in one. Designed to offer a powerful alternative to the typically weak headphone outputs of mobile devices, this tiny device utilizes proven tube technology, known for its warm, natural sound.

Nutube 6P1 tube for superior sound

Experience the future of audiophile listening with the Cayin RU9, a state-of-the-art portable USB DAC that combines the best of classic tube technology with modern craftsmanship.

The Cayin RU9 is equipped with the Nutube 6P1 tube. The small DAC supports both unbalanced 3.5 mm and balanced 4.4 mm PO/LO outputs. This flexibility allows you to optimally drive your favorite headphones or speakers. A special highlight is the ability to switch between tube and solid-state operation. This ensures an individual sound experience that adapts perfectly to your listening habits.

Three sound profiles to choose from: Classic, Modern, and Solid State

• Classic: This profile eliminates global negative feedback and uses local negative feedback instead. This technique results in higher total harmonic distortion (THD), creating a warm, nostalgic sound—the classic "tube sound" that music lovers appreciate.
• Modern: This profile integrates global negative feedback to define the overall gain. THD is significantly reduced, resulting in a harmonically cleaner and quieter background. Despite this clarity, the warmth of the tubes is retained, creating a sweet, clear, and delicate modern tube audio signature.
• Solid State: The RU9 relies on precisely tuned operational amplifier ICs and associated circuitry. This ensures a neutral tonality with fast transients and highly accurate audio reproduction. Ideal for those who want to enjoy music in its original, unadulterated character.

Versatile Uses

Whether at home, in the office, or on the go, the Cayin RU9 adapts effortlessly to a variety of usage scenarios. It offers support for a wide range of devices such as smartphones, computers, digital audio players, tablets, and even game consoles. This makes it a perfect choice for anyone looking to take their audio experience to the next level.

Dual AKM DAC & 16-core XMOS Processor

The Cayin RU9 is equipped with two AKM AK4493SEQ DACs operating in mono mode. This configuration ensures outstanding channel separation and minimizes crosstalk between channels – a crucial advantage for an immersive listening experience.

In addition, the RU9 utilizes the powerful 16-core XMOS XU316 processor, which represents the latest generation of USB audio solutions. This processor guarantees impressive digital signal processing and optimizes audio quality to the highest level.

Modern Bluetooth Codec

The RU9 utilizes advanced Qualcomm QCC5125 technology, enabling high-resolution Bluetooth transmission. It supports modern Bluetooth codecs such as LDAC and other HD streaming formats, meaning you can enjoy your music in the best possible quality – without the hassle of cables. Support for UAC1.0 (driverless) and UAC2.0 modes also ensures compatibility with most devices.

S/PDIF Input/Output

Another highlight of the Cayin RU9 is the integrated S/PDIF input/output. This allows for easy connection to other digital audio devices and ensures you can fully utilize your audio source. Whether streaming music or playing video games, the RU9 delivers clear, detailed sound. In terms of technical specifications, the Cayin RU9 impresses with its compact dimensions of 100 x 70 x 15 mm and a weight of just 150 g.

Your perfect companion for audiophile moments

The Cayin RU9 is not only a technical masterpiece, but also a statement for every music lover who values ​​sound quality. With its unique combination of classic tube technology and state-of-the-art digital processing, it elevates your listening experience to a new level. Whether at home or on the go – be inspired by the sonic diversity of the Cayin RU9 and experience music in its purest form.