{"product_id":"questyle-sigma","title":"Questyle SIGMA Portable DAC Amplifier","description":"\u003cp\u003eThe Questyle SIGMA is a portable headphone amplifier with DAC on board, handling PCM up to 768kHz and DSD512, with Bluetooth 5.4 and a 4300mAh battery. That battery is the number worth pausing on — it means the SIGMA runs on its own supply rather than draining the phone it's attached to, which is the quiet failure of most dongle DACs.\u003c\/p\u003e\u003cp\u003eBluetooth 5.4 makes it a wireless receiver too, so it can sit between a phone in your pocket and the headphones on your head with no cable running between them. Good match for demanding IEMs and efficient full-size headphones when you want more than a dongle but aren't carrying a desktop stack. Pairs naturally with a phone-first listening setup.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003ePCM768 and DSD512 support\u003c\/li\u003e\n\u003cli\u003eBluetooth 5.4\u003c\/li\u003e\n\u003cli\u003e4300mAh internal battery\u003c\/li\u003e\n\u003cli\u003eAuthorized Questyle retailer — 45-day returns, 1-year warranty\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Questyle","offers":[{"title":"Black","offer_id":45377537179783,"sku":"Questyle SIGMA -black","price":595.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0756\/5833\/0247\/files\/9602482416.jpg?v=1785504997","url":"https:\/\/tonepier.com\/products\/questyle-sigma","provider":"TonePier","version":"1.0","type":"link"}