SKU: 8668822720

Pre Order Cayin RU9 AK4493SEQ*2 Nutube 6P1 Portable DAC & AMP

Sale price$225.00 Regular price$250.00
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Ships within 48 hours · Estimated delivery Jul 18 - Jul 23

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Description

Pre Order Cayin RU9 AK4493SEQ*2 Nutube 6P1 Portable DAC & AMPFeatures: >NuTube 6P1 Tube Portable DAC & Headphone Amplifier. >Three Timbre Options(Classic Tube, Modern Tube, Solid State). >High Performance Dual DAC Setup(2xAK4493SEQ). >3rd Generation 16 Core XMOS XU316 USB Processor. >Support UAC2. 0 1. 0 Protocols. >PCM 32 Bit 768kHz, Native DSD512 Audio Signal Processing. >Four Channel Balanced Headphone Amplification Circuit. >Lag Free Bluetooth V5. 1 Connectivity. >High Definition Bluetooth Protocols

Features:-

>NuTube 6P1 Tube Portable DAC & Headphone Amplifier.

>Three Timbre Options(Classic Tube, Modern Tube, Solid State).

>High-Performance Dual DAC Setup(2xAK4493SEQ).

>3rd Generation 16-Core XMOS XU316 USB Processor.

>Support UAC2.0/1.0 Protocols.

>PCM 32-Bit/768kHz, Native DSD512 Audio Signal Processing.

>Four-Channel Balanced Headphone Amplification Circuit.

>Lag-Free Bluetooth V5.1 Connectivity.

>High-Definition Bluetooth Protocols Support(LDAC, AptX HD, AptX LL, etc.).

>Specially Developed Vibration Reduction System.

>DC Hyper Mode With 1W Output.

>3.5mm Single-Ended+4.4mm Balanced LO/PO Support.

>S/PDIF Digital Input/Output.

>Selected High-Quality Audiophile-Grade Precision Components.

>Four-Channel JRC NJW1195A Electronic Volume Control Chipset.

>Back-Panel Magnetic Design.

>Customised Magnetic Leather Case.

>L-Shaped USB Connector Cable.

>CNC-Machined Metallic Housing.

>0.96” OLED Display Screen.

>Lightweight Design(150g).

The wait for Cayin’s latest portable DAC/AMP with advanced Bluetooth V5.1 connectivity and built-in Korg NuTube6P1 Tube amplification section. It packs three timbre options: Classic Tube, Modern Tube, and Solid State. The DAC section is handled by a high-performance dual DAC setup featuring dual AK4493SEQ 32-bit DAC chips. It is supported by a 3rd-generation 16-core XMOS XU316 USB processor that enables smooth USB signal processing. With Korg 6P1 fifth-generation tube technology, the Cayin Ru9 promises fully analog output with 3.5mm and 4.4mm dual headphone ports. It features a four-channel fully balanced amplification section that delivers impressive output thrust, easily driving most IEMs and Headphones. Experience the rich, tubey flavour, or simply switch back to the traditional solid state sound, enjoy the best of both worlds with three timbre options available on the Cayin RU9!!

Fifth-Generation Korg NuTube Technology:-

Cayin RU9 incorporates the advanced Korg NuTube technology. It is one of the earliest portable DAC/AMP in the market to feature the fifth-generation Korg NuTube6P1 tubes. It provides a clean, analog sound with rich, melodious tubey flavor. Enjoy the magical, rich, tube sound in a portable form factor with the Cayin RU9.

Three-Timbre Options:-

Cayin RU9 has a very innovative audio circuitry that features both solid-state as well as tube amplification. The device has three timbre options: Classic Tube, Modern Tube, and Solid-Stage. Classic tube brings the rich, dense, tubey flavour that we are all aware of. Modern Tube timbre packs a cleaner and more refined version with a bit of brightness up top, all this while maintaining a smooth tube flavour. Thirdly, Solid State is achieved using OPAMPs, this section delivers a neutral tone with faster transients and natural sound reproduction. Users can experience three types of unique sound flavours with the Cayin RU9.

Pure High-Resolution Audio Signal Processing:-

Cayin RU9 offers true high-fidelity audio signal processing with its selected high-quality audiophile-grade precision components. Starting with the DAC section, we have a dual DAC setup featuring two AK4493SEQ DAC chips. This dual DAC arrangement is supported by a 3rd-generation XMOS XU316 16-core USB processor. It enables processing for high-resolution audio signals supporting 32-bit/768kHz PCM and native DSD512 audio signals.

High-Definition Bluetooth Connectivity:-

For the fans of wireless connections, Cayin RU9 supports wireless Bluetooth V5.1 connectivity for signal input. It supports high-definition wireless Bluetooth protocols, including LDAC, AptX HD, AptX LL, SBC, AAC, etc. Enjoy your music in its purest form, even in wireless Bluetooth connectivity with the Cayin RU9.

Astonishingly Powerful Hyper Mode:-

Cayin RU9 has a powerful, fully balanced amp section. It features advanced Hyper mode with DC connectivity that provides a strong output thrust of 1000mW at a 32Ω impedance load. For DC mode, the RU9 mode selector has to be on DC mode, and a power adapter needs to be connected.

3.5mm+4.4mm Headphone Outputs:-

Cayin RU9 is a perfect companion for your everyday carry. The DAC/AMP features dual headphone outputs, a 3.5mm single-ended and a 4.4mm balanced port. Users can connect their favourite IEMs and headphones with the RU9 with ease.

Exquisite CNC Machined Chassis With Magnetic Back Panel:-

Cayin RU9 features a robust metallic frame with lightweight aesthetics. The device is crafted using a CNC-machined metallic frame. It has a lightweight design, weighing in at just 150 grams. RU9 also features a magnetic back panel which seamlessly connects the device to smartphones, tablets, and other devices. Cayin also includes a magnetic leather case with the RU9.

 

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
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  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 8668822720

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Annette D
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Reviewed in the United States on December 7, 2025
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Three puppies voted paws up for taste and a little bit of longevity. Now as for value for money. I know how much better than rawhide treats. But I’d like to see the price come down and more chewy’s inside the bag
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Reviewed in the United States on December 9, 2025
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Gloria O.
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★★★★★ 5
Dog loved them
Great little treat
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Reviewed in the United States on August 10, 2025
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Natalia
Whiting, US
★★★★★ 2
So so small! Not worth $
The images in Amazon are nothing like what the product is. The pretzels and rings are minuscule. My two pit/lab mixes will eat one in about 30 seconds. So disappointment. Not worth the $ for what you’re getting. I tried to return items which are individually wrapped but they do not allow returns on these products. I have not opened any of them and still not able to return. If you have a dog under 15lbs these may work! If you have a large breed don’t bother. I’m so disappointed. Pictures above is the product next to a small milk bone biscuit (for reference).
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Reviewed in the United States on January 6, 2025
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Adrien Lamont
New York, US
★★★★★ 5
A Premium Magnesium Powder From A Brand I Actually Trust
Thorne has a strong reputation in the supplement world, and this Magnesium Citrate powder is a good example of why. Magnesium is one of those basic minerals that does more than people realize. It supports normal muscle and nerve function, helps with energy production, contributes to bone health, and plays a role in cardiovascular function. The NIH notes that magnesium is involved in hundreds of enzyme systems in the body, including processes tied to muscle and nerve function, blood glucose control, blood pressure regulation, and bone development. (Office of Dietary Supplements) Magnesium citrate in particular is a form many people use because it is generally well absorbed and can also help with occasional constipation. That is both a benefit and something to respect. If you take too much, it can move from “helpful” to “where is the nearest bathroom” fairly quickly. I would start modestly and see how your body responds. The citrus berry flavor is pleasant enough for a mineral powder. It is not candy, and it does not need to be. It mixes reasonably well and is easy to work into a nightly routine or use when you feel like your muscles are tight, your diet has been less than ideal, or you simply want magnesium without swallowing another capsule. The biggest selling point for me is the brand. Thorne is not some mystery-label supplement company with a pretty bottle and a warehouse address nobody wants to talk about. Thorne says its facility is NSF certified, it manufactures more than 40 NSF Certified for Sport products, and it is used by professional and national sports organizations. (Thorne) Their Magnesium Citrate product page also states that the product is third-party tested and certified to verify what is in the package. (Thorne) That matters with supplements. You are not just buying magnesium. You are buying confidence that the dosage, purity, and manufacturing standards are being taken seriously. Thorne usually costs more than bargain brands, but with supplements, cheap is not always the victory it looks like on the front end. Overall, this is a high-quality magnesium option from a brand with real credibility. I like it for muscle support, general wellness, bone and heart-health support, and occasional regularity. Just treat it like a supplement, not a snack, especially if you are sensitive to magnesium or already taking other products that contain it.
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Reviewed in the United States on May 1, 2026

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