FiiO K11 Desktop DAC and Headphone Amplifier [b-stock]


B-Stock product, (read below) in excellent condition with original packaging, 2 year warranty.

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100,82 €

This product is actually out-of-stock

Brand: FiiO


FiiO K11 Desktop DAC and Headphone Amplifier

  • Truly Balanced DAC & Amp Design
  • Strong Output Power with 1.4W Maximum Thrust
  • 3-Level Adjustable Gain
  • Specially Designed Audio Circuitry
  • CS43198 DAC Chipset
  • Supports 384kHz/32Bit PCM, Native DSD256 Signals
  • Specially-Crafted Low-Noise Power Supply
  • Custom VA Display
  • Adjustable RGB Logo Lightning
  • Multi-Function Knob
  • Driver-Free USB DAC Mode
  • Multiple Input/Output Options
  • Compact & Ergonomic Build Structure
  • Compatible With Gaming Consoles

FiiO K11 is a brand-new USB DAC/AMP with a truly balanced design. It comes with CS43198 high-performance 32-Bit DAC that provides exceptional high-resolution PCM and DSD signal decoding. It comes equipped with a bunch of input-output options including USB, Coaxial, and Optical inputs as well as 4.4mm, 6.35mm, and RCA output options. FiiO K11 is a pocket-friendly desktop DAC/AMP that can be used worry-free with a variety of devices including PC, Laptops, smartphones, and even gaming consoles including PS5 and Nintendo Switch.

 Premium Audio Circuitry

Over the years, FiiO has designed and released several successful USB DAC/AMP models, the latest K11 is designed with specially crafted audio circuitry that promises top-quality sound performance. The K11 is equipped with a high-performance CS43198 DAC chipset that delivers ultimate performance in decoding high-resolution 32-bit/384kHz PCM and Native DSD256 audio signals.

Variety Of Input-Output

FiiO K11 houses multiple input-output options. We have digital input via coaxial, optical, and USB input modes, and we have outputs via 4.4mm balanced, 6.35mm single-ended, and RCA analog line-out options. K11 easily meet your need and requirements for a capable audio setup at a pocket-friendly price tag.

USB Input

FiiO K11 USB DAC/AMP supports worry-free USB connection with a variety of devices. It can run without any driver installation. The K11 supports a variety of devices including PCs, Laptops, Smartphones, Tablets, and even gaming consoles(PS5, Nintendo Switch, etc.).

High-Power Amplification Section With Three-Level Gain

FiiO K11 is a highly capable USB DAC/AMP. The device is equipped with a powerful headphone amplifier section with three-level gain modes that produce a strong output delivering up to 1400mW of clear output at 32Ω of impedance load through the balanced connection output. It can easily drive most headphones and in-ear monitors with ease.

Low-Noise Power Supply

FiiO K11 is designed with a specially-developed low-noise power supply section. Using more than 16 low-noise LDOs for precise voltage stabilization and an external 12V power supply, the K11 achieves robust performance with stable power delivery to all sections of the audio circuitry.

Fully-Clear Display

FiiO K11 is equipped with a high-controast durable VA display screen. It displays the active sampling rate, volume level, gain level, and activate output mode.

Adjustable RGB Logo

FiiO Logo on the top of the K11 DAC/AMP has an RGB Illuminated design. It glows in different colours based on the active file bitrate. Its brightness, colour, and light patterns are all adjustable using the multi-function knob.

Multi-Function Knob Control

FiiO K11 has a minimalistic design with a multi-function knob. This knob can act as a power on/off button, volume adjustment, menu exploring, screen control, etc. Users can also switch between the Line-out and Phone-out modes by simply double-pressing the knob.




Hardware solution

SoC: GD32F303RE, DAC:CS43198

USB decoding: SA9312L

SPDIF decoding: MS8422N

AMP: SGM8262-2*2



Volume control

Volume knob


About 407g


147x133x32.3mm (Including feet)



Adaptive impedance

PO: 8~150Ω

Driver-free mode (switch mode)


BAL: 8~350Ω

Max supported sampling rate

384kHz-32bit/DSD256  Native 16/24/32bit (USB DAC)

Sampling rate indication

Show on display screen

192kHz-24bit (Coaxial)

LOGO indicator light shows as default: Cyan: 48KHz and below/Yellow: 48kHz and above/Green: DSD

96KHz-24bit (Optical)

Firmware upgrade

Supports upgrade through USB

FiiO Control




Buttons and Ports


Encoder knob (including volume

adjusting and menu confirming)


Type-C (data transmission)

Single-ended line-out

RCA port

Digital optical in

Optical port

Digital coaxial in

RCA port

Digital coaxial out

RCA port (only works in USB mode)

balanced output interface

standard 4.4mm socket

Headphone out

Standard 6.35mm port

Power Supply Parameters

Power Supply

DC 12V/2A

Battery capacity

No battery

Audio Parameters

Parts of performance and parameters of Line-out output (RCA)

THD+N & Noise

<0.00035% (1kHz/-0.3dB@10KΩ)


≥126dB (A-weighted)



Noise floor

<0.9uV (A-weighted)

Frequency response

20Hz~50kHz: damping<0.1dB

Line output level


20Hz~20KHz: damping<0.1dB

Parts of performance and parameters of headphone output (6.35mm)

Output power

L+R≥720mW +720mW (16Ω, THD+N<1%)

Output impedance


L+R≥520mW +520mW (32Ω, THD+N<1%)



L+R≥60mW+60mW (300Ω, THD+N<1%)

Peak output voltage



≥123dB (A-weighted)

THD+N & Noise

<0.00059% (1kHz/-8.1dB@32Ω)

Frequency response

20Hz~50kHz: damping<0.2dB

Noise floor

<2.8uV (A-weighted)

20Hz~20KHz: damping<0.1dB

Parts of performance and parameters of headphone output (4.4mm)

Output power

L+R≥570mW+570mW (16Ω, THD+N<1%)

Output impedance


L+R≥1400mW+1400mW (32Ω, THD+N<1%)



L+R≥250mW+250mW (300Ω, THD+N<1%)

Peak output voltage



≥123dB (A-weighted)

THD+N & Noise

<0.0010% (1kHz/-14.5dB@32Ω)

Frequency response

20Hz~50kHz: damping<0.2dB

Noise floor

<4.9uV (A-weighted)

20Hz~20KHz: damping<0.1dB

A ´B-Stock´ is a product which has been returned by a customer within their 14/30 Day Money Back Guarantee.
These items are offered at a special, reduced price. Please note, that occasionally the packaging is no longer in pristine condition.
B-Stock products are in full working order and are checked by specialists before releasing them as B-Stock. They come with the full 2 year warranty as any other new product.
Any special comments about a B-Stock product will be noted at the beginning of the article description.


FiiO logo

About FiiO Electronics Technology Co., Ltd.

01 Brand Introduction - HiFi+Fashion

FiiO Electronics Technology Co., Ltd. was established in 2007.  It is a high-tech enterprise that combines research, development, production and sales, and its sales are mainly based on its own FiiO brand as opposed to OEM/ODM.  It focuses on digital audio, with current mainstay products being portable headphone amplifiers, DAC / amps and portable digital audio players.

FiiO: It is composed of Fi (Fidelity) from HiFi and iO (represents number 1 and 0) which indicates the sincerer feeling and more convenient life the digital tech has brought to us.

飞傲: The Chinese transliteration of FiiO, as well as representing youthful vigor and the active & innovative spirit of the company.

Audio products are meant to fulfill the spiritual pleasure of users.

  1. FiiO provides products and service related to music.
  2. We also hope to bring happiness to our users with the provided products and service, which is also the key value of FiiO.

Customer Service

  1. Good after-sales service, more reliable
  2. Great user experience, more pleasure
  3. Variety of activities, more involved

About products

  1. Affordable: FiiO products are well-known for its feature of high cost-performance. Lowering the entry level to make more customers can afford.
  2. Easy to use: FiiO pays great attention to the user experience. We are not only provide products with high quality, but also easy to use and with long lasting durability.
  3. More accessories bring more fun: Enable to play in a variety way and use under more possible environments.
  4. Updates available: Equipped with a variety of ports, it makes the music players can still connect to external amp/DAC for upgraded enjoyment.
  5. Endless transformability available: With replaceable amp module and expandable storage, the X7 can bring more playability.

02 Company Profile

Research & Development Team

  • Twenty years of R&D experience in audio products
  • Former core R&D team for audio products from OPPO
  • A team of 20 professional R&D engineers in software, hardware, industrial design, structure and electro-acoustic.

Research & Development Investment

FiiO keeps bringing in advanced equipments and high-tech talents so as to ensure the stable growth and long term competitive edge. Up till now, the team size has expanded three times than that of 2007 when we established.

Team Composition

The R&D team is made up of development dep, engineering dep and QC dep, with 60+engineers in total.

Authorized certifications

FC, CE, KC, CCC and ISO9001:2008 ensure the safety and quality of the products.

Production management

FiiO has strict requirements to production with almost “zero tolerance” even to small problems, which is strictly in compliance with the International Quality Management System ISO9001. 

QC Equipment 

  • a. AP audio analyzer (valued at 200,000RMB).
  • b. Life-span test platform against high & low temperature, swing and plug & unplug trial.
  • Aging test carriage towards mass production.
  • Aging test machine under high & low temperature.

Customer oriented

Driven by customers’ needs, we innovate constantly and response promptly to the market changes. We develop new products based on customers’ needs and compete for more market shares.

Company culture - Our Vision

Present the world a better “Made in China”.

Brand Spirit

  • Innovation

the earliest company that designed the minimum volume headphone amplifier. First dockable amp & DAC product. First amp specially designed for iPod/iPhone. First amp with adjustable power supply and power supplied by mobile phone battery. First multifunctional headphone amp & DAC for Android smarphone. First Hi-Res music player at a price lower than 1000RMB supporting 192K music. First Android-based Hi-res music player. 

  • Quality

Repair Rate < 1%. Sound Quality Control system. Original components imported from TI, Wolfson, Maxim. Company-wide quality control. +20 quality engineers and inspectors. Complete testing facilities. 

  • Service

CEO at the frontline of customer service. 100% response to enquiries. The most popular headphone amplifier brand on Head-Fi. First class website and contents in the audio industry. Interaction with and support to customers on Facebook and Microblog (twitter-like social website).

Brand Mission

FiiO designs, produces and sells high-quality products at favorable prices to those who love music and style.

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FiiO K11 Desktop DAC and Headphone Amplifier [b-stock]

B-Stock product, (read below) in excellent condition with original packaging, 2 year warranty.

Write a review


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