Fiio K7 BT Desktop DAC / Headphone Amplifier

Upgraded with Bluetooth input - the Fiio K7 BT amp / DAC is a desktop champion.

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A new baseline for balanced sound - Upgraded with bluetooth input!

The K7 BT has a six-stage audio circuit with truly balanced analog and digital sections, which helps to reduce crosstalk and reproduce music faithfully and noiselessly.

The K7 BT offers a new bluetooth input compared to the original K7, with a Qualcomm QCC5124 5.1 bluetooth chip which supports LDAC, AptX HD and AptX Adaptive input -  so you can easily enjoy high quality, low latency wireless input from devices like your phone or gaming console.

Bluetooth input also supports EQ and other features using the Fiio Control app!


Balanced amplification couldn’t sound better

Using the same THX AAA 788+ amplifiers as the K9 Pro, the K7 BT is capable of outputting 560mW into a 300Ω load at 1% distortion, and 200mW into a 32Ω load at 1% distortion. This ensures both low and high impedance headphones are fully powered with optimal musicality.


Dual AK4493SEQ D/A chips

The left and right channels are each equipped with an efficient high-performance AK4493SEQ D/A chip. These 32-bit D/A chips support 768kHz PCM and DSD512, ideal for high-resolution audio source playback.


RGB indicator lights

The RGB indicator lights are capable of displaying single colors as well as mixed colors, with a unique light flow effect during power on/off or input switching. 


Worry-free listening

Overheating, overload, and DC protection systems ensure that the K7 always operates at its best, so you can always enjoy a worry-free listening experience.


Multiple independent power stages

The K7 BT features a power design consisting of multiple independent stages, with the voltage of each stage regulated by low-noise LDOs. Feeding this power design is an external 12V switching power supply. All in all, the K7 BT’s power design supplies plentiful, clean power for an extraordinary listening experience.


Smooth operator

The K7 BT features an all-aluminum alloy construction, carefully finished with CNC and other processes. Its elegant black color is perfectly complemented by the gold accents of the THX and Hi-Res Audio badges and the splashes of color from the RGB lights.


Precisely-tuned volume

Thanks to its ADC curve reconstruction, the volume potentiometer features 112 smooth steps of adjustable volume free of channel imbalances and noise.


Space-conscious design 

The K7 BT features a space-conscious design that only measures 2.1 inches thick and with a footprint smaller than ⅓ of an A4 sized sheet of paper–allowing it to fit snugly on even small desks.

  • THX AAA &88+ x2 amplifiers
  • Dual AK4493SEW D/A chips
  • Truly balanced DAC/Amp
  • Multiple intelligent protection systems
  • RGB status indicators
  • 2 gain levels
  • 3 output modes
  • Variety of inputs and outputs
  • Bluetooth 5.1 input with LDAC/AptX HD/AptX Adaptive Support
  • All-aluminum alloy body
  • Classic knobs
  • Lightweight, all-in-one device
  • FiiO K7 BT
  • Power cable x1
  • Power adapter x1
  • Bluetooth Antenna x1
  • USB cable x1
  • Quick start guide x1
  • Warranty card x1

General Specifications

Model K7 BT
Weight 610g
Gain Switch Low / High
Maximum supported sampling rate

PCM 384kHz-32bit/DSD256(USB DAC)

PCM 192kHz-24bit(COAX)

PCM 96KHz-24bit(OPT)

Recommended headphone impedance 16~300Ω
Hardware solution 

DAC: AK4493S*2


Voume IC:NJU72315 * 2

AMP:THX AAA 788+ * 2

Volume Scroll Potentiometer + ADC Sampling
FiiO Control Unsupported
Firmware upgrade XMOS can be upgraded via USB 
Sampling rate indication


Yellow: 88.2/96/176.4/192/352.8/384KHz



Buttons and Interfaces


input button

gain switch

output switch

LINE IN RCA sockets
SE Headphone Out Standard 6.35 mm port
BAL Headphone Out Standard 4.4mm port
USB USB B(data)
LINE OUT RCA sockets
COAX IN RCA socket


Audio Specifications - Line Out

Frequency Response:  
USB 20Hz~20KHz:±<0.4dB
SPDIF IN 20Hz~20kHz:±<0.8d
THD+N <0.0005%(1kHz/10kΩ/dbA)
Crosstalk ≥102dB (1kHz/10kΩ)
Noise floor <3μV(dbA)
SNR ≥116dB (dbA,USB)
Output level          ≥2Vrms


Audio Specifications - 6.35mm SE Headphone Out

Output power @ 32 ohms L+R≥1220mW+1220mW(32Ω /THD+N<1%)
Output power @ 300 ohms L+R≥140mW+140mW(300Ω / THD+N<1%)
Frequency response:  
USB 20Hz~20KHz:±<0.3dB
SPDIF IN 20Hz~20kHz:±<0.7dB
THD+N <0.0003% (1 kHz/32Ω/dbA)
Output impedance <1Ω(32Ω) 
Crosstalk ≥77dB (1 kHz/32Ω)
Noise floor <3.1μV(dbA,AUX  IN)

≥128dB (dbA,AUX IN)

≥120dB (dbA, USB)

Peak output voltage ≥18.9Vpp


Audio Specifications - 4.4mm BAL Headphone Out

Output power @ 32 ohms L+R≥2000mW+2000mW(32Ω /THD+N<1%)
Output power @ 300 ohms L+R≥560mW+560mW(300Ω / THD+N<1%)
Frequency response:  
USB 20Hz~20KHz:±<0.3dB
SPDIF IN 20Hz~20kHz:±<0.7dB
THD+N <0.0003% (1 kHz/32Ω/dbA)
Output impedance <1Ω(32Ω) 
Crosstalk ≥124dB(1 kHz/32Ω)
Noise floor <5.1μV(dbA,AUX  IN)

≥128dB (dbA,AUX IN)

≥120dB (dbA, USB)

Peak output voltage ≥37.7Vpp



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