{"product_id":"fosi-audio-gr40","title":"Fosi Audio GR40 Tube DAC, Preamp \u0026 Headphone Amp — ES9028Q2M, aptX HD","description":"\u003cp class=\"tp-summary\"\u003eThe Fosi Audio GR40 combines an ESS ES9028Q2M DAC, a two-tube preamp stage and a 3.5mm headphone amp, with Bluetooth 5.1 (aptX HD, aptX LL), USB, optical and coaxial inputs. It suits desktop setups that feed powered speakers or a power amp, with headphones on the side.\u003c\/p\u003e\n\u003ch2\u003eWho the Fosi Audio GR40 is for\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePowered speakers on a desk:\u003c\/strong\u003e The RCA output feeds powered speakers, or a power amp for passive speakers, from Bluetooth, USB, optical or coaxial sources.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeadphone listening:\u003c\/strong\u003e The 3.5mm jack is rated 250mW @ 32Ω, and the RCA output mutes while headphones are plugged in.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHi-res files from a computer:\u003c\/strong\u003e Over USB, the ES9028Q2M DAC decodes PCM up to 32-bit\/384kHz and DSD256.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWireless streaming:\u003c\/strong\u003e A Qualcomm QCC3031 Bluetooth 5.1 module supports SBC, AAC, aptX, aptX HD and aptX LL.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTube rolling:\u003c\/strong\u003e The two tubes are user-replaceable; Fosi lists EF95, 6AK5, 6J1 and similar types as compatible.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSkip it if:\u003c\/strong\u003e You need an analog input or balanced outputs; the GR40 has no RCA input and outputs on RCA and 3.5mm only.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eFosi Audio GR40 key specs\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDAC chip:\u003c\/strong\u003e ESS ES9028Q2M\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFormats:\u003c\/strong\u003e PCM up to 32-bit\/384kHz, DSD256 (USB)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInputs:\u003c\/strong\u003e Bluetooth 5.1, USB, optical, coaxial\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBluetooth:\u003c\/strong\u003e Qualcomm QCC3031; SBC, AAC, aptX, aptX HD, aptX LL; ≥10m range\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutputs:\u003c\/strong\u003e RCA line out, 3.5mm headphone (headphones take priority over RCA)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeadphone power:\u003c\/strong\u003e 300mW @ 16Ω, 250mW @ 32Ω, 50mW @ 250Ω, 40mW @ 300Ω\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSNR, dynamic range, response:\u003c\/strong\u003e ≥103dB, 104dB, 20Hz–20kHz (±1dB)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTubes:\u003c\/strong\u003e 2 × 5654W, user-replaceable (Fosi notes the tube type may vary by batch)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePower:\u003c\/strong\u003e 12V DC adapter included\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIn the box:\u003c\/strong\u003e GR40, 2 vacuum tubes, 2 decorative rings, Bluetooth antenna, power adapter, user manual\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"tp-trust\"\u003eGenuine Fosi Audio stock. Free shipping on every order, 45-day returns.\u003c\/p\u003e","brand":"Fosi Audio","offers":[{"title":"Default Title","offer_id":46347585060999,"sku":"Fosi Audio GR40-","price":140.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0756\/5833\/0247\/files\/12919466868.jpg?v=1793194059","url":"https:\/\/tonepier.com\/products\/fosi-audio-gr40","provider":"TonePier","version":"1.0","type":"link"}