The warranty period of the Cayin RU7 is of 1 year. In order to claim warranty, please visit our Cayin Warranty Page here. We are very helpful guys, just saying.

Our smartphones have become our default source of music. The only problem here is they are very convenient for music listening, but smartphones aren't made to sound great. A digital-to-analogue converter or DAC chip converts digital music files to an analogue signal output from your phone. All phones, laptops, and really any device with a 3.5mm output would have an inbuilt DAC. Unfortunately, most smartphone DACs are woefully inadequate in giving you a good-quality sound output. A dedicated portable DAC is a powerful device that connects to your smartphone through Bluetooth, USB-C, or Lightning cable and bypasses the phone's built-in DAC. The DAC can decode high-resolution audio up to the highest formats and can have a profound effect on the sound, making your listening experience on your headphones more engaging.

Most smartphones and laptops with a 3.5mm output would have an inbuilt DAC. But they usually sound basic and can make listening to music on nice pair of headphones boring. They are also, simply put, not capable of playing high-resolution audio formats. A dedicated DAC will decode the audio format you are listening to, reproducing minute details accurately to be played back on your headphones or speakers. Good DACs can make music sound more detailed, lifelike and accurate, even if you may be streaming music over Spotify or other streaming services. If you pair your headphones with a decent DAC, you'll get the finest results from a high-resolution streaming service like Apple Music or Tidal. Using a dedicated DAC is a great way to start if you have high-quality headphones and want them to sound their best.

If you're using an Android phone, Android phones usually offer a Type-C port for charging and data transmission. DACs in general come with USB Type-C male connectors, which can be paired easily to your smartphone. If you're using an iOS device with a lightning port, iOS devices like Apple smartphones have a Lightning port for charging and data transmission. DAC manufacturers in general provide a Lightning cable or a Lightning connector, which terminates to female Type-C. If not, it is simple to buy the connector or the Type-C to lightning cable separately. If you're using a Laptop with Windows Laptops have a USB-A port, and DACs feature Type-C to USB-A connectors that make it easy to connect the two devices. For some DACs to function flawlessly, drivers may need to be installed. If you're using a Mac, A Mac usually has a USB-A port, and DACs feature Type-C to USB-A connectors/cables that make it easy to connect the two devices. For some DACs to function flawlessly, drivers may need to be installed. If your DAC supports Bluetooth, Some DACs also support Bluetooth, so you may stream music wirelessly while listening to music by simply pairing your phone with the DAC and connecting your preferred earphones or IEMs. Moreover, Bluetooth DACs offer app support, giving you access to a variety of filters, EQ settings, and much more.

The Cayin RU7 DAC & Amp is a portable DAC ideally meant to be used along with IEMs when listening to music on the go or with easy-to-drive headphones. In general, these are not the best suited to use along with high-impedance headphones or full-sized open-back headphones, and we’d recommend getting something with a higher output power, like a dedicated desktop amplifier.

Portable DACs usually give you a simple 3.5mm single-ended output wherein you can plug your IEMs into them. But nicer DACs also feature a Balanced output, usually through a 2.5mm or 4.4mm port. IEM manufacturers have started including Balanced cables with a 2.5mm or 4.4mm plug to take advantage of the balanced output. And several upgrade cables are now available for virtually all IEMs having detachable cables that also feature the 2.5mm or 4.4mm plugs. A balanced output on your DAC, in general, minimises crosstalk between the left and the right channel and can make your music sound open with added depth and layering. It also offers more power and less distortion at higher volumes and can make the bass sound tighter and more deliberate.