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

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

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1. The Ultimate Bridge for Your Vinyl & Digital Audio The Fosi Audio Box X5 is a sophisticated vacuum tube... Read more

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$109.90 Excl. VAT

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    Description

    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.

    Specifications

    • Weight: 200gr
    • Usage: Indoor & outdoor

    Pros and cons

    • Sustainably produced
    • Ideal for everyday use
    • May discolor in direct sunlight

    • MM&MC Cartridges Support

      Fosi Audio BOX X5

      Mini Phono Preamp

      It supports MM and MC cartridges, provides 4-level gain adjustment,

      andprovides RIAA equalization accuracy.

    Fosi Audio BOX X5 Mini Phono Preamp

      Embrace the Vintage Charm of Vinyl with Modern Precision

      Supporting MM/MC cartridges, BOX X5 is compatible with most turntables, along with 4 adjustable gain levels of 38/48/56/66 dB. It utilizes high-precision capacitors and resistors, ensuring minimal noise for audio purity. Intuitive RCA terminals achieve a plug-and-play experience.

      • Input: MM/MC RCA; Output: RCA
      • SNR≥92dB; THD≤0.009%
      • Frequency Response: 20Hz-20kHz(±0.015dB)
      • Power Adapter: AC 16V；Input voltage:120V
      Accurate RIAA Equalization

      Accurate RIAA Equalization

      Ensuring clarity and detail in every note for

      a rich listening experience.

      Audiophile-Grade Components

      Audiophile-Grade Components

      Carefully selected top-tier components are dedicated to

      crafting extraordinary sound quality.

      BOX_x5 back interface diagram
      Fosi Audio Box X5 Scene Map
      Replace with DIP8 dual discrete op-amps, meeting your pursuit of a personalized audio experience.

      Replace with DIP8 dual discrete op-amps,

      meeting your pursuit of a personalized audio experience.

      Fosi Audio Box X5 Structure Diagram
      Connection and Usage Diagram

      Connection and Usage Diagram

      Plug-and-play convenience, ensuring optimal performance for easy setup.

      Fosi Audio Box X5 Frequency Response Curve
      Front view of Fosi Audio Box X5


      back interface diagram
      Front view of Fosi Audio Box X5

      Side view of Fosi Audio Box X5

      Product detailas

      Description
      • High Performance: The BOX X5 phono preamp is compatible with both MM and MC cartridges, featuring 4 gain settings and an excellent precise RIAA equalization to provide a clean, direct pass-through of a signal when paired with your turntable

      • Audiophile-Grade Components: This preamp utilizes a variety of materials such as 2% Precision Polyester Film Capacitors, Green Sleeve Copper Lead Audio Capacitors, 0.1% High-Precision Film Resistors, OPA1612 Op-Amp, Gold-Plated RCA Jacks, and more. It picks up subtle and finite detail produced from it and delivers a truly warm and inviting sound

      • Multiple Gain Settings: With 4-Level gain adjustment Asettings of 38/48/56/66dB, the preamplifier accommodates both MM & MC cartridge types, meeting a variety of needs. This enhances your phono stage and helps in rebuilding the vintage stereo sound

      • Mini and Exquisite: It's built around a minimalist yet functional design featuring an all-aluminum alloy chassis. When paired with the V3 stereo amplifier, the BOX X5 can bring out the best in your vinyl playback, enhancing its frequency response and dynamic performance

      • User Friendly Design: It has an easy-to-use one-touch power button, gain control, and a convenient toggle switch to switch between MC and MM cartridges. In addition, the grounding port ensures that the connection is secure

      Specifications
      • Input Mode: MM+MC RCA
      • Output Mode: RCA
      • THD: ≤0.009%
      • SNR: ≥ 92dB
      • Device Dimension: 4.1 x 6.5 x 1.4 inches
      • Power Supply: 16V/1A
      What‘s in the box？

      Which Product is right for you?

      Compare products to find the best one for your needs.

      • BOX X1 MM Turntable Phono Preamp

        BOX X1 MM Turntable Phono Preamp

        Input:RCA

        Output:Active Speakers + Headphone

        Bass & Treble Control:No

        SNR:≥ 70dB

        THD+N:≤ 0.08%

        Power Supply:12V/1.5A




      • Box X2 MM Turntable Phono Preamp

        Box X2 MM Turntable Phono Preamp

        Input:RCA+3.5mm

        Output:Active Speakers

        Bass & Treble Control:No

        SNR:≥ 98dB

        THD+N:≤ 0.1%

        Power Supply:12V/1.5A


      • Box X3 Bluetooth Tube Phono Preamp

        Box X3 Bluetooth Tube Phono Preamp

        Input:Bluetooth + AUx+ RCA

        Output:Active speakers

        Bass & Treble Control:Yes

        SNR:≥ 70dB

        THD+N:≤ 0.1%

        Power Supply:12V/1.5A



      • Box X4 MM Turntable Phono Preamp

        Box X4 MM Turntable Phono Preamp

        Input:RCA+3.5mm AUNo

        Output:RCA+3.5mm AUNo

        Bass & Treble Control:Yes

        SNR:≥70dB

        THD+N:≤ 0.1%

        Power Supply:12V/1.5A

      FAQs

      Is it mandatory to connect the turntable’s ground wire to the BOX X5’s ground terminal?

      Grounding is recommended to avoid rattling during use.


      Can the BOX X5 be used as a regular preamp?

      The BOX X5 is a phono preamp with a higher amplification gain than a regular preamp, thus it is not suitable for use as a standard preamp.

      How to power on and off to prevent any thumping sounds that could damage the equipment?

      Power On: Turn on the turntable, then the BOX X5, followed by the amplifier.

      Power Off: Turn off the amplifier, then the BOX X5, and finally the amplifier.

      What power supply is used for the BOX X5？

      The BOX X5 is powered by its supplied AC adapter, not a DC power supply. DC power supply filters cannot be used for AC power supply.

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