Fosi Audio Mini Hi-Fi Amplifiers, DACs & Preamps: Affordable Desktop Audio Solutions – EMiUZEK

Fosi audio

33 products

  • Silver Fosi Audio BT30D white background image Product Details back interface diagram

    Fosi Audio Fosi Audio BT30D – 2.1 Channel Class-D Bluetooth Amplifier with Sub Out

    5 reviews

    Next day delivery

    1. Compact Powerhouse for 2.1 Audio The Fosi Audio BT30D is a versatile and compact 2.1 channel Bluetooth power amplifier designed to be the heart of your home entertainment system. It provides a simple yet powerful solution to drive two passive speakers and one passive subwoofer simultaneously, delivering a full-range audio experience with deep, punchy bass. 2. Key Features & Benefits Advanced 2.1 Channel Architecture Dual TPA3116 Chips: Powered by two high-efficiency Texas Instruments TPA3116 chips, the BT30D delivers 50W x2 for main channels and a dedicated 100W for the subwoofer. This setup ensures high-fidelity sound with minimal distortion. Dedicated Subwoofer Control: Take full command of your low-end. The BT30D features independent knobs for Subwoofer Volume and Subwoofer Frequency (40Hz-300Hz), allowing you to perfectly blend the bass with your bookshelf speakers. Seamless Wireless & Wired Integration Bluetooth 5.0: Stream music wirelessly from your smartphone, tablet, or laptop with a stable, high-speed connection up to 50ft (15m). Multiple Output Options: In addition to driving a passive subwoofer, it also features a Pre-out for an active subwoofer, making it compatible with almost any 2.1 configuration. Professional Sound Tuning Total Tone Control: Fine-tune your listening experience with independent Bass and Treble knobs for the main stereo channels. Whether you prefer a bright, crisp sound or a warmer tone, the BT30D adapts to your taste. 3. Technical Specifications Component Specification Amplifier Chip Dual Texas Instruments TPA3116D2 Power Output 50W x2 (Stereo) + 100W (Subwoofer) @4Ω Bluetooth Version Bluetooth 5.0 Input Options Bluetooth, RCA Output Options Passive Speakers, Passive Subwoofer, Active Sub Out Sub Frequency 40Hz - 300Hz THD / SNR ≤ 0.04% / ≥ 98dB 4. Why the BT30D is a Fan Favorite The Fosi Audio BT30D strikes the perfect balance between performance, size, and price. It eliminates the need for bulky AV receivers by providing everything you need for a high-quality 2.1 setup in a palm-sized aluminum chassis. It’s the go-to choice for upgrading TV audio, desktop gaming setups, or small living room Hi-Fi systems.

    Next day delivery

    $79.90

  • Sale -0.8% Fosi Audio V3 white background image Supports XLR Balanced And RCA lnputs

    Fosi Audio Fosi Audio V3 – Compact Class-D Stereo Amplifier with 300W×2 Output

    3 reviews

    Next day delivery

    Fosi Audio V3: High-Power TI TPA3255 Stereo Class D Amplifier The Fosi Audio V3 redefines the capabilities of a compact desktop amplifier. Utilizing the cutting-edge Texas Instruments TPA3255 Class D chip, the V3 delivers immense power, exceptional efficiency, and pristine audio quality, making it the perfect choice for driving demanding passive speakers in a desktop, bookshelf, or small room setup. Flagship Chipset for Immense Power The V3 is engineered around a powerful architecture to achieve clean, high-wattage output. TI TPA3255 High-Fidelity Chip The V3 employs the renowned Texas Instruments TPA3255 high-efficiency Class D amplifier chip. This core component enables the V3 to deliver substantial power while maintaining extremely low distortion across its operational range. Massive Output Capability With the capability to deliver up to 300 Watts of power per channel into a 4Ω load (when using a strong power supply), the Fosi Audio V3 can effortlessly drive large, low-sensitivity, or power-hungry passive speakers with excellent dynamic control and punch. Customization and High-End Design The V3 offers features typically found on more expensive audiophile equipment, allowing users to tailor the sound. Interchangeable Op-Amps (Rolling) A standout feature is the ability to easily swap or "roll" the operational amplifiers (Op-Amps). This allows enthusiasts to experiment with different Op-Amp chips to subtly adjust the amplifier's sonic signature and match their personal listening preferences. High-Quality Components The V3 is built with premium components, including Wurth inductors, Nichicon capacitors, and WIMA film capacitors, ensuring long-term reliability and contributing to its excellent sound reproduction quality. Simple and Robust Integration Compact Form Factor: The V3 maintains an incredibly small footprint, allowing it to integrate seamlessly onto a crowded desk or bookshelf without sacrificing performance. Volume and Tone Controls: Features a smooth, tactile volume control knob on the front panel for easy manual adjustment. Simple Analog Input: The amplifier provides a standard RCA analog input, allowing easy connection to any external DAC, preamp, or audio source.

    Next day delivery

    $109.00 - $279.00

  • Fosi Audio Box X5 white background image B0XX5 High-Performance Phono Preamp

    Fosi Audio Fosi Audio Box X5 – High-Performance MM/MC Phono Preamplifier

    Next day delivery

    1. The Ultimate Bridge for Your Vinyl & Digital Audio The Fosi Audio Box X5 is a sophisticated vacuum tube phono preamplifier that brings the warm, organic sound of analog to the modern era. Designed specifically for Moving Magnet (MM) turntables, it also functions as a versatile digital hub with Bluetooth and multiple digital inputs, making it the perfect centerpiece for a high-fidelity hybrid audio system. 2. Key Features & Audiophile Benefits Exquisite Tube Warmth for Vinyl Jan GE5654 Vacuum Tubes: Equipped with premium GE5654 tubes, the Box X5 smooths out digital harshness and adds a rich, harmonic layer to your vinyl records. It delivers a wide soundstage and life-like vocals. Phono Preamp Excellence: Specifically engineered for MM (Moving Magnet) turntables, it features a low-noise circuit that amplifies delicate phono signals with absolute clarity and zero hum. All-in-One Digital Connectivity Bluetooth 5.0 & Digital Inputs: Beyond vinyl, the Box X5 supports Bluetooth 5.0, Optical, and USB inputs. This allows you to stream high-quality audio from your smartphone, TV, or PC through the same warm tube stage. Premium DAC Integration: The internal DAC ensures high-resolution decoding of your digital files, maintaining sonic integrity before it reaches the tube amplification stage. Precision Control & Build Bass & Treble Tuning: Fine-tune your listening experience with independent tone controls. Adjust the output to perfectly match your speakers or personal preference. Aluminum Shielding: The solid, CNC-machined aluminum chassis provides excellent protection against electromagnetic interference, ensuring a dark, quiet background for your music. 3. Technical Specifications Component Specification Input Modes Phono (MM), Bluetooth 5.0, Optical, USB Output Modes RCA (to Power Amp/Active Speakers), 3.5mm Headphone Vacuum Tubes Jan GE5654 x2 (Replaceable) THD / SNR ≤ 0.1% / ≥ 70dB (Phono), ≥ 98dB (Other) Frequency Response Standard RIAA Curve (Phono) Power Supply 12V/1.5A 4. Why the Box X5 is the Perfect Upgrade The Fosi Audio Box X5 is a rare find in the audio world—it honors the legacy of vinyl while embracing the convenience of digital. Whether you are rediscovering your record collection or streaming the latest high-res tracks, the Box X5 provides a consistent, warm, and engaging sound. Its compact design and glowing tubes make it a visual and acoustic highlight of any desktop or shelf.

    Next day delivery

    $109.90

  • Fosi Audio GR40 Tube Preamp/Headphone Amp with DAC

    Fosi Audio Fosi Audio GR40

    2 reviews

    Next day delivery

    1. The Ultimate Desktop Audio Command Center The Fosi Audio GR40 is a sophisticated 2.1 channel integrated amplifier designed to be the definitive hub for your desktop Hi-Fi system. Combining the nostalgic charm of a classic VU meter with the precision of modern digital-to-analog conversion, the GR40 provides a high-power, low-noise solution for driving both passive speakers and active subwoofers. 2. Key Features & Audiophile Highlights Vintage Aesthetics Meets Modern Tech Active VU Meter: The front panel features a large, precision-calibrated VU meter that provides a warm, analog visual to your digital music, making your desktop setup look as good as it sounds. All-in-One Connectivity: With Bluetooth 5.0, Optical, Coaxial, and USB inputs, the GR40 connects seamlessly to your smartphone, TV, PC, or gaming console. High-Resolution Decoding & Amplification Built-in High-End DAC: The internal decoding stage supports high-resolution audio files, ensuring every detail is preserved from the digital source to your ears. Authoritative Power: Driven by the high-efficiency TPA3255 core, it delivers a clean 100W x2 (@4Ω), providing effortless dynamics for bookshelf or floor-standing speakers. Versatile 2.1 System Expansion Subwoofer Pre-out: Designed for deep-bass lovers, the GR40 includes a dedicated active subwoofer output. Easily build a powerful 2.1 channel system for an immersive home theater or gaming experience. Precision Tone Tuning: Use the tactile Bass and Treble knobs to customize the frequency response, ensuring the perfect sound signature for any room or genre. 3. Technical Specifications Component Specification Amplifier Chip Texas Instruments TPA3255 Power Output 100W x2 @4Ω Digital Inputs Bluetooth 5.0, Optical, Coaxial, USB Analog Inputs RCA Outputs Passive Speakers + Active Subwoofer Out SNR / THD ≥ 105dB / ≤ 0.01% Chassis CNC Machined Aluminum 4. Why the GR40 is the Centerpiece of Your Setup The Fosi Audio GR40 (Note: ID used for illustrative purposes) represents the perfect balance of style and substance. It eliminates the need for multiple stacks of gear by combining a DAC, a preamp, and a power amp into one elegant unit. Whether you're an audiophile looking for a clean desktop solution or a movie enthusiast wanting to upgrade TV audio, the GR40 delivers a premium, immersive experience.

    Next day delivery

    $119.90

  • Fosi Audio MC331 white background image MC331 Mini Retro Integrated Amplifier

    Fosi Audio Fosi Audio MC331 – Hybrid Tube Integrated Amplifier & DAC with VU Meter

    2 reviews

    Next day delivery

    1. Professional Power with a Vintage Pulse The Fosi Audio MC331 is a high-performance 2.1-channel Bluetooth power amplifier that blends the golden age of analog audio with modern Class D efficiency. Featuring a signature warm-lit VU meter, this amplifier is designed to drive massive floor-standing speakers or desktop monitors while providing dedicated control for your subwoofer. 2. Key Features & Audiophile Innovation Authoritative TPA3255 Performance Massive Power Output: Driven by the flagship Texas Instruments TPA3255 chip, the MC331 delivers up to 100W x2 (@4Ω) for main channels and a robust 200W dedicated to a passive subwoofer. Pure Sonic Clarity: With a high SNR (≥100dB) and ultra-low distortion, it ensures that your music remains transparent and dynamic, even at high volume levels. Classic VU Meter & Aesthetic Build Visual Soundscapes: The center-mounted VU meter provides a rhythmic visual representation of your music's signal, adding a glowing, nostalgic ambiance to your listening room or office. All-Aluminum Craftsmanship: The CNC-machined chassis not only offers a premium look but also serves as an effective heatsink for the internal high-power circuitry. Precision 2.1 Channel Management Independent Subwoofer Controls: Perfect your low-end with dedicated knobs for Subwoofer Volume and Sub Frequency (60Hz-150Hz). This allows for a seamless crossover between your bookshelf speakers and your sub. Bluetooth 5.0 Wireless Freedom: Stream high-quality audio from your smartphone or tablet with a stable, long-range connection of up to 50ft (15m). 3. Technical Specifications Component Specification Amplifier Chip Texas Instruments TPA3255 Max Power Output 100W x2 (Stereo) + 200W (Subwoofer) @4Ω Bluetooth Version Bluetooth 5.0 Input Mode Bluetooth, RCA Output Mode Passive Speakers, Passive Subwoofer, Active Sub Out Sub Frequency Range 60Hz - 150Hz THD / SNR ≤ 0.03% / ≥ 100dB 4. Why the MC331 is the Ultimate 2.1 Hub The Fosi Audio MC331 is the perfect solution for audiophiles who want "Big Speaker" sound in a desktop-sized footprint. It solves the common problem of weak bass by providing a dedicated high-power channel for a subwoofer. Whether you are building a high-end gaming station or a living room Hi-Fi setup, the MC331 offers a tactile, visual, and acoustic experience that traditional amps can't match.

    Next day delivery

    $129.90

  • Fosi Audio Q6 white background image Fosi Audio Q6 Mini Desktop DAC

    Fosi Audio Fosi Audio Q6 – Mini Hi-Res DAC with AKM AK4493S, USB-C & Sub-Out

    Next day delivery

    1. Master Your Digital Audio The Fosi Audio Q6 is a high-performance Digital-to-Analog Converter (DAC) and preamplifier designed to be the ultimate bridge between your computer and your sound system. Unlike standard DACs, the Q6 features a sophisticated LED display and cutting-edge processing to deliver studio-quality sound with absolute precision. 2. Key Features & Audiophile Highlights Studio-Grade Decoding Power 32-Bit / 768kHz & DSD512 Support: Equipped with an advanced DAC architecture and XMOS USB interface, the Q6 handles the highest resolution audio formats available today. Experience your music with zero compression and breathtaking detail. Low Jitter Performance: The high-precision clock system ensures that digital timing remains perfect, eliminating "jitter" and providing a clean, stable soundstage. Intuitive LED Display & Control Real-Time Status Monitoring: The sleek front-panel LED display shows your current sampling rate, input source, and volume level at a glance. No more guessing if you are getting the "Hi-Res" signal you paid for. Seamless Preamp Function: Use the Q6 as a digital volume controller for your active speakers or power amplifiers. The smooth, stepped volume adjustment provides fine-grained control over your output. Premium Connectivity & Build Versatile Digital Inputs: Features USB, Optical, and Coaxial inputs, allowing you to connect your PC, Mac, PS5, or CD player simultaneously. Gold-Plated Outputs: The high-quality RCA outputs ensure a lossless signal transfer to your downstream equipment. 3. Technical Specifications Component Specification Decoding Rate Up to 32-Bit / 768kHz DSD Support Up to DSD512 Input Options USB, Optical, Coaxial Output Options RCA Line Out USB Interface XMOS XU208 (or equivalent high-perf) SNR / THD+N ≥ 115dB / ≤ 0.0002% Display High-Contrast LED 4. Why the Q6 is the Pro Choice The Fosi Audio Q6 is designed for the user who values information and performance. While the Q4 is for beginners, the Q6 is for those who want to see their 768kHz bitrate confirmed on a screen. Its ultra-low distortion and high-bitrate support make it a future-proof investment for any high-fidelity desktop setup.

    Next day delivery

    $85.00

  • Fosi Audio BT20A PRO white background image TPA3255 600W Power Amp

    Fosi Audio Fosi Audio BT20A PRO Bluetooth Stereo Power Amp

    51 reviews

    Next day delivery

    The Evolution of a Legend: BT20A Pro The Fosi Audio BT20A Pro is the high-performance successor to the world-renowned BT20A. Re-engineered from the ground up, the Pro version takes everything you loved about the original and pushes it further—more power, cleaner sound, and professional-grade customization. It is the definitive choice for audiophiles who want a compact yet monstrously powerful stereo amplifier. Key Features & Pro-Grade Upgrades Unmatched Power with TPA3255 Massive 300W x2 Output: By upgrading to the flagship Texas Instruments TPA3255 chip, the BT20A Pro delivers a staggering 300W x2 (@4Ω). It effortlessly drives large floor-standing speakers with authority and precision. Premium Audio Components: Featuring high-end inductors and capacitors, the Pro version provides a much lower noise floor and higher signal-to-noise ratio than standard mini amps. Designed for Audiophile Customization Swappable Op-Amps: The BT20A Pro features internal DIP8 sockets, allowing you to swap the stock NE5532 Op-Amps for high-end alternatives (like Muses02 or OPA2134) to "roll" your own signature sound. Linear Tone Control: The Bass and Treble knobs now feature a center-detent, allowing you to easily reset to a "Flat" response for pure, uncolored sound. Refined Connectivity Advanced Bluetooth 5.0: Enjoy stable wireless streaming with a wide range. The BT20A Pro also includes an all-new Bluetooth reset button—simply long-press the volume knob to clear all pairings instantly. Technical Specifications Component Specification Amp Chip Texas Instruments TPA3255 Power Output 300W x2 @4Ω (with 48V Power Supply) Input Mode Bluetooth 5.0 + RCA Output Mode Passive Speakers + 3.5mm Pre-out THD / SNR ≤ 0.005% / ≥ 108dB Op-Amps NE5532 (Replaceable) Why the BT20A Pro is the Best Choice The Fosi Audio BT20A Pro is designed for the listener who wants "no compromises." While the original BT20A remains a great entry-level value, the Pro model provides the power headroom needed for high-fidelity transients and the flexibility to upgrade your system over time.

    Next day delivery

    $99.90 - $119.90

  • Fosi Audio ZD3 white background image Comprehensive Connectivity

    Fosi Audio Fosi Audio ZD3 – Fully-Balanced Desktop DAC/Preamp with HDMI ARC

    Next day delivery

    1. The Heart of Your Balanced Audio Stack The Fosi Audio ZD3 is a high-performance, fully Balanced Digital-to-Analog Converter (DAC) designed for audiophiles who refuse to compromise on signal purity. Acting as the ultimate bridge between your digital sources and your amplifier, the ZD3 delivers studio-grade resolution, a silent background, and a stunning aesthetic that complements any high-end desktop setup. 2. Key Features & Master-Class Engineering Fully Balanced Architecture XLR & RCA Outputs: The ZD3 features true Balanced XLR outputs alongside standard RCA, significantly reducing electromagnetic interference and noise floor. It provides a cleaner, wider soundstage for high-end amplifiers like the Fosi Audio ZA3. Premium ESS Sabre DAC: Powered by the acclaimed ES9038Q2M DAC chip, it offers industry-leading dynamic range and ultra-low distortion, bringing every nuance of your high-res files to life. High-Resolution Powerhouse 32-Bit/768kHz & DSD512: Utilizing a high-performance XMOS USB interface, the ZD3 handles the most demanding digital formats without breaking a sweat, ensuring future-proof compatibility with MQA and high-res streaming services. Low-Jitter Clock System: Advanced internal oscillators ensure that digital timing is perfectly preserved, eliminating harshness and delivering a smooth, analog-like sound. Modern Wireless & Intuitive Control Bluetooth 5.0 with High-Res Support: Enjoy the convenience of wireless streaming without sacrificing quality, thanks to support for advanced codecs that maintain sonic integrity. Visual Status Display: The sleek front panel display provides instant feedback on your input source, sampling rate, and volume level, giving you total control over your audio chain. 3. Technical Specifications Component Specification DAC Chip ESS Sabre ES9038Q2M Decoding Rate Up to 32-Bit / 768kHz DSD Support Up to DSD512 Inputs USB, Optical, Coaxial, Bluetooth 5.0 Outputs Balanced XLR, Unbalanced RCA SNR / THD+N ≥ 120dB / ≤ 0.0001% USB Interface XMOS XU208/XU316 Series 4. Why the ZD3 Belongs in Your System The Fosi Audio ZD3 (ID for illustrative purposes) is more than just a converter; it is a professional-grade preamplifier. With its variable output mode, it can drive power amplifiers or active monitors directly. Its precision build and "Black Background" performance make it the perfect partner for those who have invested in high-quality headphones or speakers and want to hear them at their absolute best.

    Next day delivery

    $179.90

  • Fosi Audio K7 white background image Fosi Audio K7 DAC Headphone Amp

    Fosi Audio Fosi Audio K7 – Hi-Res DAC & Headphone Amplifier with Mic Input

    Next day delivery

    1. Professional Audio Performance for Your Desktop The Fosi Audio K7 is a high-fidelity USB DAC and Headphone Amplifier designed for those who demand more from their computer audio. Whether you are a gamer seeking pin-point spatial accuracy or an audiophile listening to high-resolution master tracks, the K7 provides the power and precision needed to drive everything from sensitive IEMs to demanding studio headphones. 2. Key Features & Performance Highlights High-Resolution Decoding Architecture 32-Bit / 384kHz & DSD256: Equipped with a premium DAC chipset and high-speed USB interface, the K7 delivers studio-quality audio. It captures the subtle nuances in your music and the critical directional cues in competitive gaming. Ultra-Low Noise Floor: The circuit is engineered to eliminate the "hiss" and electromagnetic interference often found in standard PC soundcards, providing a "black" background for your audio. Powerful Dual-Output Headphone Amp Dual Output Jacks: Features both 3.5mm and 6.35mm (1/4") headphone outputs, allowing you to connect any headset without needing cumbersome adapters. High-Power Delivery: The K7 can drive high-impedance headphones up to 300Ω with ease, providing the dynamic headroom required for a truly immersive listening experience. Versatile Connectivity & Control Multiple Inputs: Supports USB, Optical, and Coaxial inputs. It is fully compatible with Windows, Mac, PS5, and even mobile devices (via OTG). Tactile Volume Knob: A large, smooth-action volume knob on the front panel gives you precise, physical control over your sound levels without needing to navigate software menus. 3. Technical Specifications Component Specification Decoding Support Up to 32-Bit / 384kHz DSD Support DSD256 Headphone Outputs 3.5mm + 6.35mm Inputs USB Type-C, Optical, Coaxial Outputs Headphone Out + RCA Line Out Headphone Impedance 16Ω - 300Ω SNR / THD+N ≥ 110dB / ≤ 0.001% 4. Why the K7 is the Ultimate PC Upgrade The Fosi Audio K7 (ID for illustrative purposes) bridges the gap between gaming gear and professional Hi-Fi. Its RCA outputs allow you to connect it to active speakers or a power amplifier, turning it into a dedicated preamplifier for your entire desk. If you are looking for one device to handle your gaming, music, and movies with zero compromise, the K7 is the answer.

    Next day delivery

    $199.90

You have seen 33 out of 33 products

Fosi Audio: Powering Your Desktop Hi-Fi Experience

Fosi Audio is a dedicated innovator in the field of compact, high-fidelity audio equipment. Our mission is to make premium sound quality accessible to everyone, specializing in small, powerful, and highly efficient Mini Amplifiers and versatile Desktop Audio Components. Fosi Audio products are the perfect solution for upgrading your desktop, office, or small living room setup without breaking the bank.

⭐ The Core of Compact Power: Mini Amplifiers

The backbone of the Fosi Audio lineup is our selection of ultra-compact integrated amplifiers, built around efficiency and sound clarity.

  • High-Efficiency Class D Technology: Our amplifiers utilize cutting-edge Class D amplification to deliver substantial power output in a small footprint while maintaining minimal heat generation. This ensures clean, dynamic sound to drive passive bookshelf speakers.

  • Affordable Hi-Fi Performance: We focus on optimizing the audio signal path using quality components to achieve true high-fidelity sound, making audiophile performance accessible to entry-level users.

  • Plug-and-Play Simplicity: Designed for ease of use, our amplifiers and components require minimal setup, allowing users to quickly connect their PC, smartphone, or streamer to passive speakers.

🎧 Specialized Components for Sound Customization

Fosi Audio extends its product range beyond basic amplification to offer components that allow users to fine-tune their listening experience.

  • Tube Preamplifiers: Our popular line of Tube (Vacuum Tube) Preamps allows users to introduce the classic warmth, smoothness, and rich harmonics of tube audio into their digital systems, perfect for enthusiasts seeking a classic sound signature.

  • Headphone Amplifiers and DACs: We offer dedicated Headphone Amplifiers for driving high-impedance headphones and versatile DACs (Digital-to-Analog Converters) to bypass computer sound cards and improve digital source quality.

💡 Built for Modern Desktop Systems

Fosi Audio products excel in environments where space is limited but performance cannot be compromised.

  • Compact Footprint: The small, industrial metal chassis of our devices takes up minimal desk space, maintaining a clean and modern aesthetic.

  • Versatile Inputs: Products often feature a variety of inputs, including Bluetooth (AptX supported), RCA, and Optical/Coaxial, ensuring compatibility with almost any source, from turntables to smart TVs.

Choose Fosi Audio for reliable, powerful, and clean sound that proves great things—and great sound—come in small packages.

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