{"product_id":"questyle-sigma-pro","title":"Questyle SIGMA Pro Portable DAC Amplifier","description":"\u003cp\u003eThe Questyle SIGMA Pro is a portable DAC and headphone amplifier built around four current-mode amplification circuits — Questyle's signature approach, and the thing that separates their gear from the voltage-feedback designs everyone else ships. XMOS XU316 handles USB, dual ES9069 chips handle conversion.\u003c\/p\u003e\u003cp\u003eFour amplification circuits in a portable is serious hardware, not a dongle with ambitions. This is for someone driving demanding headphones away from a desk, or who wants desktop-class amplification without a desktop's footprint and power brick. Pair it with planars or high-impedance dynamics where a standard dongle runs out of steam, and it will feel like a genuine upgrade rather than a sideways move.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eFour current-mode amplification circuits\u003c\/li\u003e\n\u003cli\u003eDual ES9069 DAC chips\u003c\/li\u003e\n\u003cli\u003eXMOS XU316 USB controller\u003c\/li\u003e\n\u003cli\u003eAuthorized Questyle retailer — 45-day returns\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Questyle","offers":[{"title":"Silver","offer_id":45377531412615,"sku":"Questyle SIGMA Pro-silver","price":892.99,"currency_code":"USD","in_stock":true},{"title":"Black","offer_id":45377531445383,"sku":"Questyle SIGMA Pro-black","price":892.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0756\/5833\/0247\/files\/9602701834.jpg?v=1785504947","url":"https:\/\/tonepier.com\/products\/questyle-sigma-pro","provider":"TonePier","version":"1.0","type":"link"}