FiiO K7 Desktop USB DAC and Headphone Amplifier (Black)

BH #FIK7 • MFR #K7
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FiiO K7 Desktop USB DAC and Headphone Amplifier (Black)
Key Features
  • For Computers, Phones, Music Players
  • Dual High-Resolution AK4493S DACs
  • XMOS XUF208 USB Decoding Chip
  • Supports 384 kHz / 32-Bit, DSD256
Aimed at audiophiles and music enthusiasts, the high-fidelity FiiO K7, styled in black, is a compact desktop USB DAC and truly balanced headphone amplifier designed to faithfully reproduce your music when listening to audio from your computer, smartphone, tablet, or other digital music player. The K7 employs dual high-resolution AK4493S DACs to deliver rich audio details and a superior performance at up to a 384 kHz sampling rate supporting native DSD256. Dual THX AAA 788+ amp chips deliver powerful, nuanced sound.
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FiiO K7 Overview

Aimed at audiophiles and music enthusiasts, the high-fidelity FiiO K7, styled in black, is a compact desktop USB DAC and truly balanced headphone amplifier designed to faithfully reproduce your music when listening to audio from your computer, smartphone, tablet, or other digital music player. The K7 employs dual high-resolution AK4493S DACs to deliver rich audio details and a superior performance at up to a 384 kHz sampling rate supporting native DSD256. Dual THX AAA 788+ amp chips deliver powerful, nuanced sound.

Equipped with RCA analog line inputs, optical and coaxial digital inputs, a USB Type-B port, RCA analog line outputs, and two headphone jacks, the K7 acts as a bridge between your computer, phone, speakers, and headphones, allowing them to work together seamlessly. Switchable low- and high-gain levels are available, enabling you to use the amplifier with almost any headphones at comfortable volume levels. Constructed from durable aluminum alloy, the elegant design is just over 2" thick, allowing you to easily place it on modern desktops and workstations.

A New Baseline for Balanced Desktop Sound
  • The K7 has a six-stage audio circuit with truly balanced analog and digital sections, helping to reduce crosstalk and accurately reproduce your music for a more enjoyable listening experience.
  • Using the same THX AAA 788+ amplifiers as the K9 Pro, the K7 is capable of outputting 560mW into a 300-ohm load at 1% distortion. This ensures both low- and high-impedance headphones are powered properly.
Dual AK4493SEQ Chips for Precise DAC
The left and right channels are each equipped with an efficient high-performance AK4493SEQ digital to analog converter to provide nuanced and delicate reproduction of your favorite music.
Robust Decoding Capabilites
The XMOS XUF208 decoder chip uses dual clock management to handle various music formats with ease, allowing you listen to many audio formats.
Large Volume Knob + RGB Indicator Lights
  • The large volume dial provides precisely tuned gain control over a smooth 112 steps of adjustment.
  • The RGB indicator lights are capable of displaying single colors as well as mixed colors, with a unique light flow effect during powering on/off and input switching. Dazzling and vivid light effects add visual spice to your desktop.
  • The high- and low-hardware gain levels allow you to easily adjust the K7 to handle headphones of various impedances and sensitivities for rich and consistent listening.
A Variety of Inputs and Outputs in One Place
  • Two headphone outputs are provided, a 1/4" unbalanced jack and a 4.4mm balanced connector.
  • Unbalanced RCA line inputs and output connectors along with coaxial, optical, and USB digital connectors are on the rear panel
  • One key controls switching between the four different inputs, while a second key allows you to switch between three different output modes (for use with headphones, speakers, or as a DAC)
Robust External Power Supply
  • The K7 features a power design consisting of multiple independent stages, with a voltage of each regulated by low-noise LDOs.
  • Feeding this power design is an external 12V switching power supply engineered to provide plenty of clean power for your sonic enjoyment.

FiiO K7 Specs

Key Specs
Form Factor
Desktop
Converter Type
D/A Converter
Number of Channels
2
Maximum Sampling Rate
384 kHz / 32-Bit
Number of Microphone Inputs
No
Analog Audio I/O
1x Stereo RCA Line Input
1x 1/4" TRS Headphone Output
1x Stereo RCA Line Output
1x 4.4 mm TRRRS Headphone Output
Digital Audio I/O
TOSLINK Optical S/PDIF Input
RCA Coaxial S/PDIF Input
General
Form Factor
Desktop
Converter Type
D/A Converter
Number of Channels
2
Converter Circuitry
D/A Chipset:
2x AKM AK4499
Display
No
Maximum Sampling Rate
384 kHz / 32-Bit
Number of Microphone Inputs
No
Connectivity
Analog Audio I/O
1x Stereo RCA Line Input
1x 1/4" TRS Unbalanced Headphone Output
1x Stereo RCA Line Output
1x 4.4 mm TRRRS Balanced Headphone Output
Phantom Power
No
Digital Audio I/O
1x TOSLINK Optical S/PDIF Input
1x RCA Coaxial S/PDIF Input
Host Connection / USB
No
Host Connection Protocol
USB 2.0
USB (Non-Host)
1x USB-B (Digital Input)
Sync I/O
No
Network I/O
No
MIDI I/O
No
Expansion Slots
No
Wireless
No
Performance
Frequency Response
RCA Line Outputs:
20 Hz to 20 kHz ±0.4 dB (USB IN)
20 Hz to 20 kHz ±0.8 dB (SPDIF IN)

1/4" Headphone Outputs:
20 Hz to 20 kHz ±0.3 dB (USB IN)
20 Hz to 20 kHz ±0.7 dB (SPDIF IN)

4.4 mm Balanced Headphone Outputs:
20 Hz to 20 kHz ±0.3 dB (USB IN)
20 Hz to 20 kHz ±0.7 dB (SPDIF IN)
Maximum Output Level
RCA Line Outputs:
2 Vrms

1/4" Headphone Outputs:
18.9 V p-p

4.4 mm Balanced Headphone Outputs:
37.7 V p-p
Headphone Output Power
1/4":
1220 mW into 32 Ohms
140 mW into 300 Ohms

4.4 mm:
2000 mW into 32 Ohms
560 mW into 300 Ohms
Impedance
16 to 300 Ohms
SNR
RCA Line Outputs:
116 dBA

1/4" Headphone Outputs:
≥ 128 dBA (AUX IN)
≥ 120 dBA (UAC)

4.4 mm Balanced Headphone Outputs:
≥ 128 dBA (AUX IN)
120 dBA (UAC)
THD+N
RCA Line Outputs:
0.0005%

1/4" Headphone Outputs:
0.0003%

4.4 mm Balanced Headphone Outputs:
0.0003%
Crosstalk
RCA Line Outputs:
≥ 102 dB

1/4" Headphone Outputs:
≥ 77 dB

4.4 mm Balanced Headphone Outputs:
≥ 124 dB
Digital Audio
Sample Rates
44.1 to 384 kHz
Bit Depths
24 / 32-Bit
Sync Sources
No
Compatibility
OS Compatibility
Windows / macOS
Mobile Device Compatibility
No
Required Hardware
USB 2.0 Port
Power
Power Requirements
AC/DC Power Adapter (Included)
AC/DC Power Adapter
12 VDC at 2 A (Included)
Physical
Weight
21.5 oz / 610.0 g
Packaging Info
Package Weight
2.56 lb
Box Dimensions (LxWxH)
9.1 x 8 x 3.2"

FiiO K7 Reviews

Good Product

By Andrew
Rated 5 out of 5
Date: 2025-04-06

Bought this for my HifiMan Edition XS’s, does everything I need it to do, sounds great, and is easy to use. Not much more I could ask for. Will be using this until I need a new one.

I hate doing this

By Stephen
Rated 1 out of 5
Date: 2023-05-10

What a major disappointment, after reading multiple reviews and listening to youtube influencers, what a let down. THIS IS NOT A DAC.,, no definitive definition in mid or highs , 45 degree sound stage. Muffle bass no thud in the beat, and this is at max volume. No better than a typical sound card eg motu 828es. Compared to my fiio btr5 and also ifi Zen one sound signature , korg ds dac 10r . I did not play mqa songs from tidal in comparing only hifi song from tidal, but against all 3 dac's its a big No go. I returned the unit.

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