SKU: 79822358704

FiiO K11 R2R High-Performance Desktop DAC / Headphone AMP

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Description

FiiO K11 R2R High-Performance Desktop DAC / Headphone AMPFeatures: >High Performance Desktop R2R DAC AMP. >Fully Differential 24 Bit R2R Resistor Array. >NOS OS Dual Mode Free Switching. >Professionally Designed Electronic Volume Control Chipset(NJW1195A). >Supports 32 Bit 384kHz PCM and Native DSD256 Audio Signal Processing. >Professional Audio Amp Circuit. >1300mW+1300mW Strong Output. >Three Levels Adjustable Gain. >Specially Designed Low Noise Power Supply. >6. 35mm+4. 4mm Dual Headphone Output Options.

Features:-

>High-Performance Desktop R2R DAC/AMP.

>Fully Differential 24-Bit R2R Resistor Array.

>NOS/OS Dual-Mode Free Switching.

>Professionally Designed Electronic Volume Control Chipset(NJW1195A).

>Supports 32-Bit/384kHz PCM and Native DSD256 Audio Signal Processing.

>Professional Audio Amp Circuit.

>1300mW+1300mW Strong Output.

>Three-Levels Adjustable Gain.

>Specially Designed Low-Noise Power Supply.

>6.35mm+4.4mm Dual Headphone Output Options.

>High-Quality Emerald Solid-State Capacitors.

>Customized LCD Display Screen.

>Global RGB Logo Light.

FiiO has released a new R2R variant for its highly acclaimed K11 desktop DAC/AMP. With a self-developed fully differential 24-Bit R2R Resistor Array, the K11 R2R brings a smooth and rich sound to its listeners. The K11 R2R has NOS/OS dual operating modes, each having its own sound characteristics. The DAC/AMP houses dual headphone output options, one 6.35mm single-ended and another 4.4mm balanced port. Equipped with a powerful amp section with three-level adjustable gain and high-quality emerald solid-state capacitors, the K11 R2R delivers a strong output of 1300mW per channel. Experience a rich, smooth, organic R2R sound with the FiiO K11 R2R, available now!!

Fully-Differential 24-Bit R2R DAC Array:-

FiiO has featured its newly developed four-channel fully differential 24-bit R2R resistor array on the K11 R2R. It consists of 48 resistors per channel, a total of 192 high-precision ultra-thin film resistors with 0.1% accuracy and low-temperature drift between the four channels. It promises clean and crisp output with dark background thanks to the specially developed audio circuit architecture.

NOS/OS Dual Operating Modes:-

FiiO K11 R2R has NOS(Non-Oversampling) and OS(Oversampling) dual operating modes. These are freely switchable and offer dual sound characteristics with the device. The NOS mode maintains the original sampling rate while signal processing while the OS mode oversamples all the signals to 384kHz for processing. NOS mode results in more musical presentation while the OS mode delivers more details and clarity.

Powerful Amp Section:-

FiiO has equipped the K11 R2R with professionally designed amp circuitry. It consists of Ti OPA1642 as Low-Pass filters and then dual SGM8262 Professional-grade operational amplifiers. The K11 R2R has an output power rating of up to 1300mWx2, which is adequate enough to drive demanding headphones with ease. It has three-level gain modes for easy pairing with sensitive as well as high-power requiring gear. The K11 R2R also adopts NJW1195A precise digital volume chipset for precise volume adjustment with low distortion between the channels.

Dual Headphone Output Ports:-

FiiO K11 R2R houses dual headphone output ports. It consists of a single-ended 6.35mm port and a balanced 4.4mm output port. You can easily pair different IEMs and headphones with the K11 R2R and enjoy high-resolution music to all its glory.

True High-Resolution Audio Signal Processing:-

FiiO K11 R2R supports decoding for high-resolution audio signals. It has full support for PCM and DSD signal processing supporting up to 32-bit/384kHz PCM and DSD256 audio signals. DSD256 requires the DSD output mode to be set to native. It is internally converted into PCM for R2R signal processing.

Professionally Designed Low-Noise Power Supply:-

FiiO K11 R2R features a professionally designed low-noise power supply. It consists of 17 Low-Noise LDO precision voltage regulator ICs and 2 DC-DCs providing a multi-channel power supply. It further benefits from the external 12V power supply ensuring a clean output with low noise and distortion issues. K11 R2R delivers quality sound for its users.

 

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SKU: 79822358704

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Gita Anjali
Houston, US
★★★★★ 5
great for beginners
Format: Paperback
simple to understand, good examples
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Reviewed in the United States on May 3, 2026
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Atiyah Ellerbee
Charlottesville, US
★★★★★ 5
Great book!
Format: Paperback
Great book! I really like how the instructions are explained in the book and how it encourages you to both use the terminal / python interpreter and make files in vscode. This book can be used for intermediate python programmers and brand new programs. for the intermediate people, its a good refresher of the basics, and by the end you will definitely KNOW, KNOW them. I got this book in prep for new grad job applications, code assessments, game jams, and general practice. So I think you would do good to get this book at any level if you really want to get the basics down and know them!
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Reviewed in the United States on January 2, 2026
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Pete
Lake Worth, US
★★★★★ 5
One of the best Python books
Format: Paperback
I bought 5 Python books as I needed to learn the language quickly for an upcoming project. Of all the books that I purchased, I found this one to be the best. It starts out with the basics and works its way through more complicated areas. Each chapter builds well upon the other. There is very little redundancy, and I was able to get through the book in about a week. I have a background in software development, so this book was able to show me how Python implements different concepts that I already knew, but I think a beginner would also be comfortable with the material.
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Reviewed in the United States on March 22, 2026
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LinckG
Fort Morgan, US
★★★★★ 4
Easy to follow
Format: Paperback
Good book and easy to follow. Progression is well paced
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Reviewed in the United States on January 6, 2026
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J.
Port Orchard, US
★★★★★ 5
Honestly, I never thought I would enjoy studying this much!
Format: Paperback, Format: Paperback
I was so grateful for this book's excellence that I opened the Amazon website during my break to write a review. I wanted to brush up on my skills before taking my first Python class in the fall, so I was looking for a beginner's book I could study on my own over the summer. Since I had no coding experience, I needed a book that explained even the smallest details step-by-step. I've been studying with the goal of completing two chapters a week since August. I'm currently on Chapter 8, and it's been so much fun! Honestly, I never thought I would enjoy studying this much. I spent two days on practice problem 8-8 (though I spent most of the time lying on the couch screaming, "Why can't I do this?" than actually solving the problem). However, after some time, I reconsidered and re-tested the problem, and today, on the third day, I finally figured out what the issue was! I resisted the urge to ask AI or look at the GitHub code the author had posted. Instead, I solely relied on the book to solve the problem. The information in the book was more than enough. I'm proud of myself! If you're a beginner like me and just starting out with Python, I highly recommend this book! It seems unlikely I'll be able to finish all the remaining chapters and projects before the fall semester, but I'd like to take the time over the weekend to finish this book if possible. I have no doubt that the detailed, helpful explanations and systematic practice problems will help me solidify my fundamental Python coding skills.
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Reviewed in the United States on August 29, 2025

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