{"product_id":"fosi-audio-sk01-headphone-amplifier-preamplifier","title":"Fosi Audio SK01 Headphone Amplifier \u0026 Preamplifier","description":"\u003ch4\u003eThe Fosi Audio SK01 combines headphone amplification and analog preamplification in a single portable device, delivering 2400mW RMS at 32 ohms across impedances spanning 16 to 300 ohms. Three-band tone control—treble, midrange, and bass—with center-detent positioning enables precise acoustic customization, while the PURE button defeats all EQ for transparent signal path operation. Dual 3.5mm connectors accommodate line-level inputs and outputs, with additional 3.5mm and 6.35mm headphone jacks providing universal compatibility across consumer and professional headphones. The isolated power architecture eliminates ground-loop interference, ensuring clean signal reproduction during extended listening sessions. An integrated high-capacity battery delivers up to six hours of continuous operation, establishing the SK01 as an ideal companion for desktop audio work or portable use. The precision-engineered aluminum alloy chassis reflects meticulous craftsmanship while maintaining a compact footprint. Whether functioning as a dedicated headphone amplifier, customizable preamp, or parametric equalizer, the SK01 adapts to diverse audio applications with exceptional versatility and sonic performance.\u003c\/h4\u003e","brand":"Fosi","offers":[{"title":"Default Title","offer_id":47826645942324,"sku":"SK01","price":79.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0729\/7030\/5588\/files\/001_54f7ccfb-73dc-458c-871d-9b08fc31f2d5.webp?v=1779394113","url":"https:\/\/www.theheadphoneshop.com\/products\/fosi-audio-sk01-headphone-amplifier-preamplifier","provider":"The Headphone Shop","version":"1.0","type":"link"}