FiiO K5 Pro ESS


% €199.00* (10.05% saved)

Instant delivery, delivery time: 1-3 days

Product number: HL01801
Product information "FiiO K5 Pro ESS"

K5 Pro Desktop DAC and Amplifier

The classic lives on with stronger decoding





1High-performance DAC: ESS9038Q2m

2USB decoding chipXMOS XUF208

3Specially-designed audio architecture: second-order LPF+analog volume adjustment + voltage amplification +current drive

4Variety of inputs: coaxial/optical/RCAline-in

5Variety of outputs6.35mm (1/4 in.) headphone out/RCAline-out

6Gain control: low, medium, and high gain

7USB DAC768K/32Bitand DSD decoding

8RGB sampling rate indicator: blue/green/yellow

9Extremely powerful, easily powers any full-size headphones



1.    Product Architecture


A concert right at your desktop

With the K5 Pro you can truly experience eerily realistic details and a roller-coaster of emotions from your music. The K5 Pro acts as a bridge, allowing your computer, speakers, and headphones to work together and transport you to a stunning concert hall right from your desktop.?


Naturally gifted at decoding

In the K5 Pro, clock management is improved and overall decoding performance is excellent. This is due to the XMOS XUF208 USB decoding chipwith an all-new clock matching management system, with unprecedent capabilities that supports decoding up to a sample rate of 768kHz and hardware native DSD decoding.


Get truly faithful reproduction of music with coaxial/digital inputs

No matter what audio equipment you use, digital audio inherently has advantages in integrity and fidelity of signals transmitted. The K5 Pro allows you to take advantage of digital audio with optical and coaxial inputs supporting up to 192kHz inputs, convenient for connecting various music players and digital interfaces.


Next-generation DAC for unrivalled sound quality

The K5 Pro achieves new heights in sound quality, thanks to the high-performance ESS ES9038Q2M DAC with 32-bit processing and VELVET SOUND technology, along with the XMOS USB decoding chip with 768kHz and DSD inputs. With the left and right audio channels being independently handled and fully differential audio output, the K5 Pro has such a high level of resolution you will be hearing details you never noticed before.


Specially-designed audio architecture for true high-fidelity sound

When it comes to amplification, the K5 Pro is no slouch. The K5 Pro has generous space to fit and package the necessary components for exceptionalanalog amplification, and packs a four-level audio circuit capable of providing extraordinary audio fidelity in its class: second-order LPF + analog volume adjustment + voltage amplification + current drive. Each part of the amplification circuit works perfectly together in harmony for excellent dynamic range and high resolution of sound.



Utterly precise volume control

The NJRC NW1195A analog volume adjustment chip features an ultra-low output noise of -118dB and is able to adjust volume by 0.5dB per step. And when this is paired with the combination of the flagship TI TPA6120 op-amp and the OPA1642 JFET op-amp, the K5 Pro provides wonderfully smooth, yet high resolution sound.牋


Safe, secure, and robust external power supply

The K5 Pro uses a DC 15V power supply designed to specifically minimize noise. The incoming DC power is filtered with a secondary power supply, which then independently supplies power to the amplification part of the audio circuit and the rest of the circuit. This effectively suppresses power supply ripple and minimizes power supply crosstalk between the two major sections of the circuit, for a more stable and less noisy power that is crucial for outstanding sound for such a precisely-designed high performance audio architecture.


Musical perfection with ADC volume adjustment

Through reconstruction of the ADC curve, the K5 Pro抯 volume control allows you to smoothly adjust volume at extremely fine increments without any undesirable noise nor with any channel imbalances. With the K5 Pro, you can comfortably use various headphones with all kinds of sensitivities.


Gain control with toggle switches for precise sound

Both the input selection and gain are controlled by tactile toggle switches, which are clearly labelled allowing you to easily control your music. Low, medium, and high gain levels are available allowing you to use the K5 Pro with almost any headphone at comfortable volume levels. A purely hardware gain circuit is used at low gain, with unaffected and uncompromised dynamic range and overall music fidelity.


3 gain levels

Low 0dB


High +10dB

3 input modes


SPDIF INcoaxial and optical, but with priority for coaxial




2. Exterior appearance


Finely-textured all-aluminum body

The all-aluminum body is repeatedly polished with CNC and is then carefully finished with anodizing and fine sandblasting, for a smooth yet finely-textured shell. The K5 Pro is a compact, robust unit that doesn抰 take up much space, perfect for your desk.


Minimalist yet full of personality

The one-piece all-metal oversized volume knob is seamlessly integrated within the aluminum front panel, allowing you to easily and comfortably control volume. The RGB light indicator that surrounds the volume knob lights up with different colors according to the current sample rate, giving a lively splash of color that perfectly complements the minimalism of the rest of the K5 Pro.

48kHz and below 棗Blue light

48kHz and above 棗Yellow light

DSD棗Green light


Getting precise with toggle switches

Both the input selection and gain are controlled by tactile toggle switches, which are clearly labelled allowing you to easily control your music.

3 gain levels

Low 0dB


High +10dB

3 input modes


SPDIF INcoaxial and optical, but with priority for coaxial





3. Useful in many scenarios


Highly useful beyond imaginationWide variety of inputs and outputs

1.       Desktop DAC and amplifier ?like a USB sound card + full-sized headphones

2.       DAC for external sources -like a USBsound card +active speakers

3.       Powerful amplifier for mobile devices?Connect your phone via USB OTGor connect your player via coaxial


?Extremely powerful headphone amplification

The carefully-tuned feedforward amplifier circuit design increases the power output of the TPA6120 op-amp by more than 60%, for a total power output of up to 1.5 W under a 32Ω load, and up to 20Vpp at 300Ω. The K5 Pro easily handles any low or high impedance headphone.


?RCA line-out for high quality output to other sources

Besides the wide variety of digital inputs, the K5 Pro also features a traditional analog RCA line-in. RCA line-in is not only more robust and less prone to breakage than 3.5mm line-in, it also has better resolution. The RCA line-out line signal is adjustable up to a maximum of 2Vrms, so the K5 Pro can be used with a variety of active speakers and external amplifiers.

*When using the line out, please disconnect your headphones


?Coaxial, Optical, and Line-in inputs

Most phones and portable music players cannot push full-sized headphones to their full potential, since they cannot provide high-voltage or high-current headphone amplification due to their limited power supplies. However, connect your portable device to the K5 Pro through USB or coaxial input and listen to your music the way it was meant to be listened on your headphones with proper powerful amplification!

Note: K5 Pro is powered by external DC power; the USB port consumes almost no power.




Functionality Comparison


K5 Pro







USB Decoding

Up to 768kHz/32bit

Not supported (requires docking with a FiiO player)

Up to 384kHz/32bit



Not supported



Line in/USB/Coaxial/Optical

Line in/Dock in


Mobile phone connectivity


Not supported

Not supported

Indicator Lights


Red and blue



Specs Comparison

Signal-to-Noise RatioAUX)



>113 dB(A-weighted)





Noise floorAUX)




Channel SeparationAUX)

70 dB

70 dB

70 dB




Color: Black