{"product_id":"fosi-audio-box-x1-mm-phono-preamp-with-rca-3-5mm","title":"Fosi Audio BOX X1 MM Phono Preamp with RCA \u0026 3.5mm","description":"\u003cb\u003eThe Fosi Audio BOX X1 is a compact MM phono preamplifier that converts your turntable's phono signal to clean line-level audio with RCA and 3.5mm outputs.\u003c\/b\u003e\n\n\u003cp\u003eIf you want to plug a moving-magnet turntable into powered speakers, an amplifier, or headphones without rewiring your setup, the BOX X1 provides low-noise amplification and accurate RIAA equalization in a durable metal enclosure. It includes a DC12V adapter, a grounding post to reduce hum, and the ability to use the RCA line output and 3.5mm headphone output at the same time, making it a flexible addition to home vinyl rigs.\u003c\/p\u003e\n\n\u003ch3\u003eHow does the BOX X1 improve turntable playback quality?\u003c\/h3\u003e\n\u003cp\u003eThe BOX X1 raises the phono cartridge's tiny signal to standard line level while applying RIAA-equalization, restoring the original tonal balance intended by the record mastering. Its low-noise circuitry and measured distortion figures help keep surface noise and coloration to a minimum so your speakers hear more of the music and less of the electronics.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eUltra-low-noise MM preamp circuitry for clearer signal amplification\u003c\/li\u003e\n  \u003cli\u003ePrecise compliance with RIAA frequency response for faithful tonality\u003c\/li\u003e\n  \u003cli\u003eTHD ≤0.08% @ 1 kHz (3 mV) to limit audible distortion\u003c\/li\u003e\n  \u003cli\u003eSNR around 70dB for improved dynamic clarity\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhich connections does it offer and how flexible are they?\u003c\/h3\u003e\n\u003cp\u003eThe BOX X1 includes an MM phono input, stereo RCA line outputs for powered speakers or an amplifier, and a 3.5mm headphone jack for private listening. Both the RCA and AUX headphone outputs can be used simultaneously, letting you share playback or route sound to different devices without swapping cables.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eMM phono input compatible with most cartridges\u003c\/li\u003e\n  \u003cli\u003eStereo RCA line output at up to 2 Vp-p into 10K ohms\u003c\/li\u003e\n  \u003cli\u003e3.5mm headphone output for direct monitoring\u003c\/li\u003e\n  \u003cli\u003eSimultaneous RCA and headphone operation for multi-device use\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat about power, grounding, and build quality?\u003c\/h3\u003e\n\u003cp\u003eThe BOX X1 runs from the supplied DC12V adapter for steady, low-noise operation and includes a dedicated grounding post to help eliminate turntable hum. It ships in a compact black anodized steel case that resists interference and holds up to daily use next to turntables and audio gear.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eIncluded DC12V power adapter for consistent performance\u003c\/li\u003e\n  \u003cli\u003eGrounding post to reduce hum and protect the turntable return path\u003c\/li\u003e\n  \u003cli\u003eSturdy black anodized steel housing for EMI shielding and durability\u003c\/li\u003e\n  \u003cli\u003eCompact footprint fits desktop or shelf-mounted systems\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWill it match my system and what are the measurable specs?\u003c\/h3\u003e\n\u003cp\u003eThe BOX X1 is tuned for moving-magnet cartridges and will integrate with most consumer receivers, active speakers, and headphone setups thanks to its standard RCA and 3.5mm outputs. Its electrical specs give a clear expectation of performance so you can compare it to other preamps.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eOutput voltage: up to 2 V (P-P) into 10K ohms\u003c\/li\u003e\n  \u003cli\u003eSignal-to-noise ratio: approximately 70 dB\u003c\/li\u003e\n  \u003cli\u003eTotal harmonic distortion: ≤0.08% at 1 kHz, 3 mV input\u003c\/li\u003e\n  \u003cli\u003eAccurate RIAA equalization for balanced playback\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: The Fosi Audio BOX X1 is ideal for vinyl enthusiasts who need an affordable, reliable MM phono preamp to connect a turntable to powered speakers, a home stereo, or headphones. It's a good fit for hobbyists upgrading from integrated amps without built-in phono stages, small apartment systems where space and silence matter, and anyone who wants straightforward, RIAA-correct amplification in a rugged, compact package. The package includes the BOX X1 unit, a 12V power adapter, and a user manual so you can set up quickly and start listening.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Is the BOX X1 compatible with MM and MC cartridges?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: The BOX X1 is designed for moving-magnet (MM) cartridges and is not optimized for low-output moving-coil (MC) cartridges.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Can I use headphones and speakers at the same time?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes — the BOX X1 supports simultaneous use of the RCA line outputs and the 3.5mm headphone output.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Fosi Audio","offers":[{"title":"Default Title","offer_id":48413460922525,"sku":"B08TLRPMDC","price":56.41,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0766\/9596\/1757\/files\/fosi-audio-box-x1-front-panel.jpg?v=1781267284","url":"https:\/\/nexoltic.com\/products\/fosi-audio-box-x1-mm-phono-preamp-with-rca-3-5mm","provider":"Nexoltic","version":"1.0","type":"link"}