
Fosi Audio K7 AKM DAC Audio Decoder
Key Features
- Premium AKM4493SEQ DAC and XMOS XU208 Processor
- High-Resolution Audio Format Support
- Hi-Res Bluetooth Connectivity with Qualcomm QCC3031
- Powerful Dual Headphone Amplifier System
- Comprehensive Input and Output Connectivity
- Intelligent Triple Protection System
Cash / Online Payment · EMI Available
Description
Fosi Audio K7 AKM DAC Audio Decoder – Compact Flagship HiFi Hub with Balanced Power and Precision Sound
The Fosi Audio K7 AKM DAC Audio Decoder is a compact yet highly powerful desktop HiFi audio solution designed for audiophiles, gamers, and professional listeners who demand high-resolution sound quality and versatile connectivity. Manufactured by Fosi Audio and distributed by Audio Phonic, the K7 integrates a premium AKM DAC, XMOS USB processor, high-power headphone amplifier, and advanced Bluetooth connectivity into a single all-in-one audio hub.
Built with fully balanced circuitry and ultra-low distortion architecture, the K7 delivers clean, precise, and dynamic sound reproduction. It supports multiple input sources including USB-C, optical, coaxial, Bluetooth, and microphone input, making it a complete desktop audio center for music, gaming, and multimedia applications.
With support for high-resolution PCM up to 384kHz and DSD256 playback, combined with powerful headphone amplification and intelligent protection systems, the Fosi Audio K7 is designed for users who want studio-level sound performance in a compact form factor.
Key Features of Fosi Audio K7 AKM DAC Audio Decoder
Premium AKM4493SEQ DAC and XMOS XU208 Processor
At the heart of the Fosi Audio K7 lies the AKM4493SEQ DAC chip combined with the XMOS XU208 USB audio processor.
This powerful combination delivers:
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High-resolution audio decoding
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Accurate digital-to-analog conversion
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Low distortion sound reproduction
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Natural and smooth tonal balance
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Stable and high-speed USB audio transmission
Together, these chips ensure detailed, transparent, and immersive sound performance suitable for audiophile-grade listening.
High-Resolution Audio Format Support
The K7 supports a wide range of high-resolution audio formats for superior listening quality.
Supported formats include:
USB input:
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PCM up to 32-bit / 384kHz
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DSD256
Optical input:
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PCM up to 24-bit / 192kHz
Coaxial input:
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PCM up to 24-bit / 192kHz
Bluetooth input:
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PCM up to 24-bit / 48kHz
This ensures compatibility with both modern digital music libraries and traditional audio sources.
Hi-Res Bluetooth Connectivity with Qualcomm QCC3031
The Fosi Audio K7 is equipped with the Qualcomm QCC3031 Bluetooth chip, offering stable wireless audio transmission.
Supported Bluetooth codecs include:
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aptX HD
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aptX Low Latency (LL)
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aptX
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AAC
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SBC
Benefits include:
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High-quality wireless audio streaming
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Low latency for gaming and video playback
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Stable connection up to 13 meters
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Easy smartphone pairing
This makes it ideal for both entertainment and productivity use cases.
Fully Balanced Circuit Design with Ultra-Low Distortion
The K7 uses a fully balanced audio architecture designed to minimize noise and distortion.
Performance highlights:
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THD+N: <0.0002% (balanced output)
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Noise floor: as low as 2.5μV
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Dynamic range: 121dB
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SNR: up to 122dB
Benefits include:
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Clean background audio
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Enhanced stereo separation
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Improved soundstage width
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Highly accurate sound reproduction
This ensures professional-grade audio clarity for all listening environments.
Powerful Dual Headphone Amplifier System
The Fosi Audio K7 features two dedicated headphone outputs designed for different listening needs.
4.4mm Balanced Output:
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2100mW + 2100mW @32Ω
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Extremely powerful output
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Wide dynamic range
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Enhanced soundstage and detail
3.5mm Single-Ended Output:
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600mW + 600mW @32Ω
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Clean and controlled sound
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Suitable for most headphones
This dual-output design ensures compatibility with both high-end audiophile headphones and everyday listening devices.
Comprehensive Input and Output Connectivity
The K7 is designed as a complete desktop audio hub with extensive connectivity options.
Inputs include:
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USB-C input
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Coaxial input
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Optical input
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Bluetooth input
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3.5mm microphone input
Outputs include:
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4.4mm balanced headphone output
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3.5mm single-ended output
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RCA line output
This allows seamless integration with:
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PCs and laptops
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Gaming consoles
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Smartphones
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Active speakers
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Headphones and amplifiers
Intelligent Triple Protection System
The K7 is equipped with advanced safety mechanisms to ensure stable and reliable performance.
Protection features include:
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Overheat protection
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Overload protection
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Overcurrent protection
These systems ensure:
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Safe long-term usage
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Protection for headphones and speakers
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Stable output performance during heavy use
User-Friendly Display and Control Interface
The Fosi Audio K7 features a 1.5-inch LCD display with an intuitive control system.
Design highlights:
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High-definition display for real-time information
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Tactile shortcut buttons
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Multi-functional rotary knob
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Ergonomic angled design
This allows easy navigation and control of all audio settings.
Premium CNC Aluminum Alloy Build
The K7 is built with a full-metal aluminum chassis using CNC machining technology.
Design features:
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Sandblasted aluminum finish
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Compact desktop-friendly design
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Durable and heat-resistant structure
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Premium aesthetic appearance
This ensures both durability and modern HiFi styling.
Low Noise Floor and High Audio Purity
The K7 achieves extremely low noise levels for clean audio reproduction.
Key performance:
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Noise floor: ≤2.5μV
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THD+N: ultra-low distortion levels
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Clean signal processing
This ensures silent backgrounds and detailed music playback.
Technical Specifications of Fosi Audio K7
Chipset Configuration
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DAC Chip: AKM4493SEQ
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USB Processor: XMOS XU208
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Bluetooth Chip: QCC3031
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Headphone Amplifier: TPA6120
Input Options
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USB-C input
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Optical input
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Coaxial input
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Bluetooth input
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3.5mm microphone input
Output Options
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4.4mm balanced headphone output
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3.5mm single-ended headphone output
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RCA output
Audio Resolution Support
USB:
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PCM up to 32-bit / 384kHz
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DSD256
Optical/Coaxial:
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PCM up to 24-bit / 192kHz
Bluetooth:
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PCM up to 24-bit / 48kHz
Bluetooth Specifications
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Bluetooth version: 5.0
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Connection distance: ≤13 meters
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Supported codecs:
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aptX HD
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aptX LL
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aptX
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AAC
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SBC
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Headphone Output Performance
4.4mm Balanced:
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2100mW × 2 @32Ω
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SNR: 121dB
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THD+N: <0.0002%
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Noise floor: ≤6.5μV
3.5mm Single-Ended:
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600mW × 2 @32Ω
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SNR: 122dB
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THD+N: 0.0005%
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Noise floor: ≤2.5μV
RCA Output Performance
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Output level: ≥2Vrms
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Dynamic range: 121dB
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THD+N: 0.0005%
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Noise floor: ≤3μV
Power Requirements
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DC 12V / 2A
Physical Specifications
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Dimensions: 155 × 95 × 55 mm
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Weight: 530g
Sound Performance and Listening Experience
Clean and Transparent Audio Output
The AKM DAC architecture ensures accurate and natural sound reproduction with minimal coloration.
Powerful and Dynamic Headphone Driving
High-power balanced output delivers strong bass control and dynamic impact.
Wide Soundstage and Precise Imaging
Fully balanced design enhances stereo separation and spatial accuracy.
Low-Latency Bluetooth Experience
aptX LL support ensures smooth audio synchronization for gaming and video.
Studio-Grade Audio Clarity
Ultra-low distortion and high SNR provide professional-level sound performance.
Why Choose Fosi Audio K7 from Audio Phonic
Audio Phonic offers authentic HiFi products designed for users who demand performance and reliability. The Fosi Audio K7 is a complete desktop audio solution combining DAC, amplifier, and preamp functionality in one compact device.
Choosing this product ensures:
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Genuine Fosi Audio engineering quality
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High-resolution AKM DAC performance
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Powerful balanced headphone output
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Advanced Bluetooth connectivity
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Compact all-in-one desktop design
It is an ideal choice for audiophiles, gamers, and desktop audio users.
Ideal Applications of Fosi Audio K7
The K7 is suitable for:
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Desktop HiFi audio systems
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Gaming setups
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Studio monitoring environments
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Music production listening stations
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Active speaker systems
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Movie and entertainment setups
Its versatility makes it a powerful all-in-one audio solution.
Setup Guide for Fosi Audio K7
Connect your preferred input source via USB-C, optical, coaxial, Bluetooth, or microphone input. Then connect headphones or speakers using balanced or RCA outputs.
For best performance:
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Use balanced 4.4mm output for high-end headphones
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Enable aptX HD or LDAC for Bluetooth devices
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Adjust gain level based on headphone impedance
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Use high-resolution audio files for best clarity
Setup is simple and plug-and-play.
Maintenance and Usage Tips
To maintain optimal performance:
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Keep device in ventilated area
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Avoid moisture and heat exposure
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Use stable DC 12V power supply
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Clean with soft dry cloth
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Use quality audio cables
Proper care ensures long-term stability and sound quality.
Frequently Asked Questions
Does the Fosi Audio K7 support high-resolution audio?
Yes, it supports PCM up to 384kHz and DSD256.
What DAC chip does it use?
It uses the AKM4493SEQ high-performance DAC chip.
Does it support Bluetooth?
Yes, it supports aptX HD, aptX LL, AAC, and SBC codecs.
Can it drive high-impedance headphones?
Yes, it supports headphones from 16Ω to 300Ω.
Does it have balanced output?
Yes, it includes a 4.4mm balanced output.
Is it suitable for gaming?
Yes, aptX LL and low latency design make it ideal for gaming.
Does it support microphone input?
Yes, it includes a 3.5mm microphone input




















