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FiiO New K3 (2021) Desktop Headphone Amplifier & USB DAC

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FiiO New K3 (2021) Desktop Headphone Amplifier & USB DAC

  • Two USB Audio modes

  • Flagship-grade PCM 384k/DSD256 decoding

  • Power supply via the USB port: Convenient and safe

  • High-performance discrete built-in ESS ES9038Q2M DAC chip with high SNR and low distortion

  • OPA926x2 as the headphone amplifier chip with low distortion and noise

  • TI OPA1612 as the LPF to drive the line output

  • Lineout, single-ended / balanced headphone output, coaxial, optical output connections

  • High-performance discrete headphone drive and circuit protection

  • Built-in power filtering and switching circuit for purer audio output

  • Gain and bass swtiches to meet different listening requirements

  • Dual headphone outs, dual digital audio outs

  • ADC volume control

Special Price $149.00

Regular Price: $189.00

Save 21 %



Elevate your computer with powerful decoding

Just connect the new K3 to your computer via USB to instantly upgrade to high-fidelity sound, and enjoy your music the way it was meant to be heard. Equipped with an XMOS USB receiver chip, the new K3 is capable of decoding up to 384kHz/32 bit PCM and native DSD256 – the same as many DACs costing much more. The new K3's dual crystal oscillators ensure that any digital audio signals being fed into the DAC are exactly correct for further enhanced sound quality.

Great "core" improvement

The new K3 employs the flagship portable ESS DAC, the ES9038Q2M. Compared to the AK4452, the signal-to-noise ratio has increased by 14dB and distortion has reduced by 13 dB. The circuit design implementing this DAC has been optimized for a low noise floor and clean sound.

  • SNR increased by 12%
  • Distortion (THD+N) reduced by 12%

High-performance low distortion op-amp

Compared to the last generation K3, FiiO has noticeably improved on various performance indicators and overall sound quality, so you can get immersed in your music even more easily.

Not obsolete with brand new tuning

Simply reliable USB power

The new K3 adopts the modern USB Type-C input interface for a more reliable and stable connection, including that of power. However, care to ensure an uncompromised power supply doesn't stop there – the new K3 implements overvoltage protection (OVP) and a double-filter circuit to ensure power supply stability, while the digital and analog audio circuits each get their own power supply to greatly reduce crosstalk.

Low and High gains ADC volume control

The switch for high and low gain meets your listening volume needs of delicacy and large dynamics. Plus an ADC volume control, the user is able to smoothly adjust the volume to a more accurate and finer degree, allowing the new K3 to be used with headphones of all kinds of sensitivity to really make your songs, games, and movies come to life.

Tiny round goodness in the palm of your hand

The all-aluminum black body has been painstakingly CNC-machined, anodized, and sandblasted to ensure that the new K3 feels robust yet perfectly textured for a great feel in your hands. Combined with its small size, you can easily take the new K3 wherever you need to.

Two modes of many situations

Sometimes, you may not have access to a device that can connect to the new K3 via USB Audio Class 2. In these situations, you can go to USB Audio Class 1 mode with just the flick of a switch.

*Using the 2.0 mode requires downloading and installing the FiiO USB driver

*After switching USB modes, you need to either turn the K3 off and on, or unplug and plug in the USB cable.

A distinctively cohesive tactile audiovisual experience

The volume knob, with 45° notches etched onto its surface and perfectly sized to allow easy one-finger operation, is designed to perfectly blend in with the curves of the new K3 body for a distinctive touch. Next to the volume knob is an RGB light that indicates what kind of digital audio is being input to the new K3, visually confirming what you are hearing in your music.

  • 48kHz sampling rate and below - Blue
  • Above 48kHz sampling rate - Yellow
  • DSD - Green

Different connection options for different scenarios

1. Connect it to a desktop computer
2. Use the driverless 1.0 mode for business trips
3. Make it a digital turntable connected to an external decoder
4. Connect it to a speaker, using the K3 as a DAC

Dual headphone jacks

Being optimized for indoor desktop use, the K3 is equipped with both 3.5mm single-ended and 2.5mm balanced headphone jacks. Both outputs have audio jack detection, which means that when headphones are inserted into the balanced out, balanced boost automatically kicks in resulting in about a 50% output power increase compared to the single-ended out.

Line out connector

The 3.5mm line out is driven directly by the OPA1612 op-amp, to ensure as little sound quality reduction as possible. The line out output is also adjustable with maximum power output up to 2Vrms, to ensure compatibility with a wide variety of active speakers and external amplifiers.

*When using the line out, please disconnect any headphones

Coaxial and Optical digital outs

The XMOS USB receiver chip in the new K3 directly converts any USB audio input to digital signals output via the coaxial and optical connectors, allowing you to connect to speaker systems, amplifiers, or other external decoders.

*The volume knob does not control digital output volume. The New K3 can output digital audio signals up to 192kHz and DSD64 over DoP. Please adjust the settings of the device you are connecting the NEW K3 to if the device does not support the digitally output format.

Technical Specifications

Additional Information

Colour Black
Warranty 1 year (local)
Product Weight (g) 82
Availability Available
Product Type Amplifier (Headphone), DAC (Digital-Analog Converter)
Style/Type Desktop
Features High-Res Audio Certified, Line-in, Line-out, Optical Output
DAC ESS Sabre ES9038Q2M
Sampling / Bitrate 384kHz-32bit/DSD256
Frequency Response (Hz) 192kHz-32bit/DSD64 (coaxial); 96kHz-32bit (optical)
Signal-to-Noise Ratio (SNR) ≥113dB
Total Harmonic Distortion (THD) ≤0.004%
Output Power 3.5mm headphone output: 220mW(16Ω), 120mW(32Ω); 2.5mm TRRS balanced headphone output: 320mW(16Ω), 200mW(32Ω)
Input Connectivity USB Type-C (USB-C)
Output Connectivity 3.5mm Stereo, 2.5mm Balanced / 4-Pole, TOSLINK Optical (SPDIF), Coaxial (SPDIF)
Microphone None
Additional Tech Specs View full Technical Specifications on official FiiO website
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