Product Description
Multifunctional & User-Friendly Design Fosi Audio K7 Desktop DAC Headphone Amp
The versatile solution for headphone HiFi and desktop audio.
Born for HiFi and Entertainment
The K7 is an all-in-one HiFi DAC and headphone amplifier, developed based on in-depth interviews with hundreds of headphone HiFi and gaming enthusiasts. It supports mainstream digital inputs including USB, optical, and coaxial, and features aptX HD/LL for high-quality Bluetooth audio streaming.
Input: Bluetooth, COAX, OPT, USBOutput: 3.5mm Single-ended/4.4mm Balanced Headphone Output, RCASNR: ≥ 121dB; THD+N: ≤ 0.0002%; Noise Floor: ≤6.5μVInput Voltage: DC 12V
The video showcases the product in use.The video guides you through product setup.The video compares multiple products.The video shows the product being unpacked. K7ĺ®ŁäĽ č§†é˘‘ Merchant Video
Desktop Audio Hub
Matches with HiFi headphones to meet the needs of audiophiles, building high-quality audio.
Audiophile-Grade Chipset Integrated
Delivers high-resolution and immersive audio excellence.
Comprehensive Connectivity Options
Multiple interfaces make connecting your devices effortless.
Your Headphone and Mic Needs Covered
Supports powerful balanced and single-ended outputs, plus crystal-clear mic input.
Hi-Res Bluetooth Codecs
Imperceptible Latency: Under 40msSampling Rate: PCM 24bit/48kHz
1 All-in-One
2 Audiophile-Grade Chips
3 Multiple Interfaces
4 Headphone & Mic Ports
5 Lossless Bluetooth
Excellent Combination of HiFi and Gaming
Delivers clear sound with minimal distortion, unlocking your headphones & speakers’ full potential.
0.0002% Ultra-low Distortion
Reduces noise and interference with gain and protection circuits for clear, authentic audio output.
Ensuring Clear Sound Quality
Low-noise LDOs ensure clean power delivery, boosting audio performance with strong, stable output.
1 Application Scenario
2 Control Layout
3 Connection Diagram
4 Fully Balanced Circuitry
5 Multiple LDO Regulators
Real-time Feedback on the Current Settings 
Multifunctional, Pressable, Infinitely Rotatable 
Effortless Operation with Tactile Feedback 
Optimized for Desktop Use 
CNC Integration Design
A compact and exquisite full-metal chassis with fine sandblasting, robust and durable.
1 1.5-in LCD Display
2 Large-sized Knobs
3 Tactile Buttons
4 Angled Ergonomic Design
5 All-Aluminum Alloy
Which input modes support the use of microphones?
The microphone can only be used in USB input 1.0 mode, not in Bluetooth, optical fiber, etc; The microphone is not supported in RCA output mode, only in headphone output mode.
Why can’t the microphone function be used in USB 2.0 mode?
Because 2.0 supports higher sampling rates, while the sampling rate of the microphone is only 16bit/48khz. When playing high sampling rates such as dsd or 384khz, if the microphone is turned on at the same time, the two will conflict.
Does the 3.5mm audio output interface on K7 support 4-section headphones inserted to use the microphone for calls?
Not supported.
Does the microphone have noise-reduction processing?
Yes, K7 has targeted the ambient noise frequency band and has processed it in an algorithm to make your call clearer.
Microphone mute function.
After turning on the microphone mute function with one click, the other party will not hear any of your voice.
Versatile DAC Amp: The K7 is designed for both HiFi headphone audiophiles and music lovers. It can serve as a powerful hub for building your desktop audio system. Whether your’re enjoying music, gaming or working, the K7 handles it all with ease
Audiophile-Grade Chipset: Equipped with the AK4493S DAC, XMOS XU208 USB processor, and TPA6120 headphone amps, the K7 supports high-resolution decoding up to PCM 384kHz/32bit and DSD256. With up to 2100mW output power, it easily drives demanding headphones
Comprehensive Connectivity: Supports USB-C, coaxial, optical, Bluetooth aptX HD/LL and 3.5mm microphone input. Outputs include 4.4mm balanced, 3.5mm single-ended, and RCA—easily connecting to headphones, powered speakers, or amplifiers for desktop setups
User-Centric Design: Compact yet user-friendly, the K7 features dual large control knobs, five shortcut buttons, and an angled chassis for ergonomic comfort. A high-resolution display shows real-time status, making operation easy and intuitive
Durable All-Metal Build: Crafted from solid aluminum alloy, the K7 features a rugged, wear-resistant chassis with a sleek metallic finish and enhanced electromagnetic interference shielding
