{"product_id":"boulder-812-headphone-amplifier-pre-amp-dac-and-streamer","title":"Boulder 812 Headphone Amplifier, Pre-Amp, DAC, and Streamer","description":"\u003ch2\u003eDescription\u003c\/h2\u003e\n\u003cp\u003eThrough the worldwide success of the 866, Boulder has expanded the 800 series with the 812 DAC, Preamplifier, headphone amp.\u003c\/p\u003e\n\u003cp\u003eBy applying the design philosophy from the 866, and over 35 years of experience designing DAC’s, preamps, and amplifier circuits, you get a device that has precision, top of the line performance. Plus the quality and reliability you would expect from a Boulder product, in a refined package.\u003c\/p\u003e\n\u003cp\u003eThe 812 is Boulder’s first headphone amp, and we didn’t hold back. It has a separate sophisticated headphone amplifier circuit, four types of connections, and headphone sensitivity settings within the Boulder Controller app. With 4 W into 8 ohms and 1 W into 32 ohms, the amplifier section in the 812 will drive any headphones or multiple headphones at once. It is a headphone enthusiast’s dream come true.\u003c\/p\u003e\n\u003cp\u003eIt can be used just as a preamp, a DAC, a headphone amp or any combination of the three. With all the features and its versatility, the 812 is perhaps the highest value product Boulder has ever produced.\u003c\/p\u003e\n\u003cp\u003eThe 812 is something for long-term Boulder fans, headphone enthusiasts, or for someone starting their first Boulder system. We wanted to create something accessible and multifunctional that could fit into any sound system or become the system itself. The 812 accomplishes that.\u003c\/p\u003e\n\n\u003ch2\u003eFeatures\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eSophisticated headphone amplifier. Allows for 1\/8\" mini, 1\/4\", 4-pin balanced and Pentaconn headphones.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eStreaming capabilities, Roon endpoint, UPnP playback and Air-Play functionality.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eA software-enabled fixed DAC out option.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eA dedicated Boulder app controls the 812 and makes custom setup adjustments, like headphone sensitivity. Optional RF remote for volume control and switching inputs also available.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eTwo pairs of balanced analog inputs. One pair of balanced analog outputs. Two Toslink optical inputs, one coaxial input and one USB-B input.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eAlong with assembly and testing, every circuit board and piece of metalwork is produced in-house at Boulder's dedicated facility for unparalleled quality assurance.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eIn-house manufacturing efficiency improvements have made the 812 an incredible value in comparison to previous preamplifiers and DACs.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eStylish headphone bay cover to keep dust out of headphone jacks.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eEasily switch between headphone and preamp mode with the output exchange button.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003e\u003cspan\u003eSpecs\u003c\/span\u003e\u003c\/h2\u003e\n\n\u003c!-- HEADPHONE SPECS --\u003e\n\u003cdiv class=\"spec-row clearfix\"\u003e\n  \u003cdiv class=\"spec-left\"\u003e\u003cp\u003e\u003cstrong\u003eHeadphone Outputs\u003c\/strong\u003e\u003c\/p\u003e\u003c\/div\u003e\n  \u003cdiv class=\"spec-right\"\u003e\n    \u003cp\u003e\n      • 4.4mm Pentacon Balanced\u003cbr\u003e\n      • 4-Pin XLR Balanced\u003cbr\u003e\n      • 6.35mm (1\/4”) Single-Ended\u003cbr\u003e\n      • 3.5mm (1\/8”) Single-Ended\n    \u003c\/p\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"spec-row clearfix\"\u003e\n  \u003cdiv class=\"spec-left\"\u003e\u003cp\u003e\u003cstrong\u003eHeadphone Output Voltage\u003c\/strong\u003e\u003c\/p\u003e\u003c\/div\u003e\n  \u003cdiv class=\"spec-right\"\u003e\u003cp\u003e• 16 V p-p\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"spec-row clearfix\"\u003e\n  \u003cdiv class=\"spec-left\"\u003e\u003cp\u003e\u003cstrong\u003eHeadphone Output Power\u003c\/strong\u003e\u003c\/p\u003e\u003c\/div\u003e\n  \u003cdiv class=\"spec-right\"\u003e\n    \u003cp\u003e\n      • 4 W @ 8 Ω\u003cbr\u003e\n      • 2 W @ 16 Ω\u003cbr\u003e\n      • 1 W @ 32 Ω\n    \u003c\/p\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003c!-- GENERAL SPECS --\u003e\n\u003ch3 style=\"margin-top: 25px;\"\u003eGeneral Specifications\u003c\/h3\u003e\n\n\u003cdiv class=\"spec-row clearfix\"\u003e\n  \u003cdiv class=\"spec-left\"\u003e\u003cp\u003e\u003cstrong\u003eConnections (Back)\u003c\/strong\u003e\u003c\/p\u003e\u003c\/div\u003e\n  \u003cdiv class=\"spec-right\"\u003e\n    \u003cp\u003e\n      • 2 Pair XLR Analog Inputs\u003cbr\u003e\n      • 1 Pair XLR Preamplifier Output\u003cbr\u003e\n      • 4× USB Host\u003cbr\u003e\n      • Ethernet\u003cbr\u003e\n      • USB-B\u003cbr\u003e\n      • 2 Optical Digital Inputs\u003cbr\u003e\n      • Coaxial (RCA, SPDIF) Digital Input\n    \u003c\/p\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"spec-row clearfix\"\u003e\n  \u003cdiv class=\"spec-left\"\u003e\u003cp\u003e\u003cstrong\u003eSoftware Features\u003c\/strong\u003e\u003c\/p\u003e\u003c\/div\u003e\n  \u003cdiv class=\"spec-right\"\u003e\n    \u003cp\u003e\n      • Based on 866 DSP Filter \u0026amp; DAC topology\u003cbr\u003e\n      • Configurable Headphone Sensitivity\u003cbr\u003e\n      • Available Fixed DAC Output\u003cbr\u003e\n      • HTML Programming\u003cbr\u003e\n      • Control via Boulder Controller App\u003cbr\u003e\n      • Input Trim\n    \u003c\/p\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"spec-row clearfix\"\u003e\n  \u003cdiv class=\"spec-left\"\u003e\u003cp\u003e\u003cstrong\u003eHardware Features\u003c\/strong\u003e\u003c\/p\u003e\u003c\/div\u003e\n  \u003cdiv class=\"spec-right\"\u003e\n    \u003cp\u003e\n      • Switch Between Headphone \u0026amp; Preamp Outputs\u003cbr\u003e\n      • Volume Knob \u0026amp; Chassis Machined In-House\u003cbr\u003e\n      • 100 dB Optically-Encoded Volume Control\u003cbr\u003e\n      • Innovative Protection Circuits\n    \u003c\/p\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"spec-row clearfix\"\u003e\n  \u003cdiv class=\"spec-left\"\u003e\u003cp\u003e\u003cstrong\u003eMaximum Input Level\u003c\/strong\u003e\u003c\/p\u003e\u003c\/div\u003e\n  \u003cdiv class=\"spec-right\"\u003e\u003cp\u003e• 6.0 Vrms\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"spec-row clearfix\"\u003e\n  \u003cdiv class=\"spec-left\"\u003e\u003cp\u003e\u003cstrong\u003ePower Requirements\u003c\/strong\u003e\u003c\/p\u003e\u003c\/div\u003e\n  \u003cdiv class=\"spec-right\"\u003e\u003cp\u003e• 90–240V\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"spec-row clearfix\"\u003e\n  \u003cdiv class=\"spec-left\"\u003e\u003cp\u003e\u003cstrong\u003ePower Consumption\u003c\/strong\u003e\u003c\/p\u003e\u003c\/div\u003e\n  \u003cdiv class=\"spec-right\"\u003e\u003cp\u003e• 50W Max\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"spec-row clearfix\"\u003e\n  \u003cdiv class=\"spec-left\"\u003e\u003cp\u003e\u003cstrong\u003eDimensions\u003c\/strong\u003e\u003c\/p\u003e\u003c\/div\u003e\n  \u003cdiv class=\"spec-right\"\u003e\u003cp\u003e• 12” × 12” × 3.5”\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"spec-row clearfix\"\u003e\n  \u003cdiv class=\"spec-left\"\u003e\u003cp\u003e\u003cstrong\u003eWeight\u003c\/strong\u003e\u003c\/p\u003e\u003c\/div\u003e\n  \u003cdiv class=\"spec-right\"\u003e\u003cp\u003e• 14 lbs\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003c!-- PREAMP SPECS --\u003e\n\u003ch3 style=\"margin-top: 25px;\"\u003ePreamplifier Specifications\u003c\/h3\u003e\n\n\u003cdiv class=\"spec-row clearfix\"\u003e\n  \u003cdiv class=\"spec-left\"\u003e\u003cp\u003e\u003cstrong\u003eMaximum Output Level\u003c\/strong\u003e\u003c\/p\u003e\u003c\/div\u003e\n  \u003cdiv class=\"spec-right\"\u003e\u003cp\u003e• 14.0 Vrms\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"spec-row clearfix\"\u003e\n  \u003cdiv class=\"spec-left\"\u003e\u003cp\u003e\u003cstrong\u003eTHD+N (2V Output, 2 kHz)\u003c\/strong\u003e\u003c\/p\u003e\u003c\/div\u003e\n  \u003cdiv class=\"spec-right\"\u003e\u003cp\u003e• 0.0017% (−95.5 dB)\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"spec-row clearfix\"\u003e\n  \u003cdiv class=\"spec-left\"\u003e\u003cp\u003e\u003cstrong\u003eMaximum Voltage Gain\u003c\/strong\u003e\u003c\/p\u003e\u003c\/div\u003e\n  \u003cdiv class=\"spec-right\"\u003e\u003cp\u003e• 19.4 dB\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"spec-row clearfix\"\u003e\n  \u003cdiv class=\"spec-left\"\u003e\u003cp\u003e\u003cstrong\u003eVolume Range\u003c\/strong\u003e\u003c\/p\u003e\u003c\/div\u003e\n  \u003cdiv class=\"spec-right\"\u003e\u003cp\u003e• 100 dB\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"spec-row clearfix\"\u003e\n  \u003cdiv class=\"spec-left\"\u003e\u003cp\u003e\u003cstrong\u003eVolume Steps\u003c\/strong\u003e\u003c\/p\u003e\u003c\/div\u003e\n  \u003cdiv class=\"spec-right\"\u003e\u003cp\u003e• 1.0 dB\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"spec-row clearfix\"\u003e\n  \u003cdiv class=\"spec-left\"\u003e\u003cp\u003e\u003cstrong\u003eFrequency Response\u003c\/strong\u003e\u003c\/p\u003e\u003c\/div\u003e\n  \u003cdiv class=\"spec-right\"\u003e\n    \u003cp\u003e\n      • 20 Hz – 50 kHz: +0.00 \/ −0.03 dB\u003cbr\u003e\n      −3 dB points: 0.02 Hz \u0026amp; 250 kHz\n    \u003c\/p\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"spec-row clearfix\"\u003e\n  \u003cdiv class=\"spec-left\"\u003e\u003cp\u003e\u003cstrong\u003eClip to Noise Ratio\u003c\/strong\u003e\u003c\/p\u003e\u003c\/div\u003e\n  \u003cdiv class=\"spec-right\"\u003e\u003cp\u003e• 116 dB\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"spec-row clearfix\"\u003e\n  \u003cdiv class=\"spec-left\"\u003e\u003cp\u003e\u003cstrong\u003eInput Impedance\u003c\/strong\u003e\u003c\/p\u003e\u003c\/div\u003e\n  \u003cdiv class=\"spec-right\"\u003e\u003cp\u003e• 100 kΩ Balanced\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"spec-row clearfix\"\u003e\n  \u003cdiv class=\"spec-left\"\u003e\u003cp\u003e\u003cstrong\u003eOutput Impedance\u003c\/strong\u003e\u003c\/p\u003e\u003c\/div\u003e\n  \u003cdiv class=\"spec-right\"\u003e\u003cp\u003e• 100 Ω Balanced\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch2\u003eRecommended Cables\u003c\/h2\u003e\n\n\u003ch3 style=\"margin-top: 15px;\"\u003eFor External DAC Use\u003c\/h3\u003e\n\u003cp\u003e\n  \u003ca href=\"https:\/\/abyss-headphones.com\/collections\/jps-labs-cables\/products\/jps-labs-superconductor-4-interconnect\" target=\"_blank\" rel=\"noopener\"\u003e\n    JPS Labs Superconductor 4 XLR Interconnect\n  \u003c\/a\u003e\n\u003c\/p\u003e\n\n\u003ch3 style=\"margin-top: 20px;\"\u003eFor PC \/ Digital Source Use\u003c\/h3\u003e\n\u003cp\u003e\n  \u003ca href=\"https:\/\/abyss-headphones.com\/collections\/jps-labs-cables\/products\/jps-labs-superconductor-v-rca-s-pdif-digital-cable\" target=\"_blank\" rel=\"noopener\"\u003e\n    JPS Labs Superconductor V - Digital Cable\n  \u003c\/a\u003e\n\u003c\/p\u003e\n\n\u003ch3 style=\"margin-top: 20px;\"\u003ePower Cable Recommendations\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n    \u003cstrong\u003eGood:\u003c\/strong\u003e \n    \u003ca href=\"https:\/\/abyss-headphones.com\/collections\/jps-labs-cables\/products\/jps-labs-kaptovator-lite-high-performance-ac-cable\" target=\"_blank\" rel=\"noopener\"\u003e\n      JPS Labs Kaptovator Lite High Performance AC Cable\n    \u003c\/a\u003e\n  \u003c\/li\u003e\n  \u003cli\u003e\n    \u003cstrong\u003eBetter:\u003c\/strong\u003e \n    \u003ca href=\"https:\/\/abyss-headphones.com\/collections\/jps-labs-cables\/products\/jps-labs-kaptovator-ultra-high-performance-ac-cable\" target=\"_blank\" rel=\"noopener\"\u003e\n      JPS Labs Kaptovator Ultra High Performance AC Cable\n    \u003c\/a\u003e\n  \u003c\/li\u003e\n  \u003cli\u003e\n    \u003cstrong\u003eBest:\u003c\/strong\u003e \n    \u003ca href=\"https:\/\/abyss-headphones.com\/collections\/jps-labs-cables\/products\/jps-labs-aluminata-reference-ac-cable\" target=\"_blank\" rel=\"noopener\"\u003e\n      JPS Labs Aluminata Reference AC Cable\n    \u003c\/a\u003e\n  \u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv\u003e\n\u003cp\u003e\n\u003c\/p\u003e\n\u003ch3 style=\"text-align: center; margin-top: 30px;\"\u003e\u003cstrong\u003eBOULDER SALES FROM ABYSS TO USA CUSTOMERS ONLY\u003c\/strong\u003e\u003c\/h3\u003e\n\u003c\/div\u003e","brand":"ABYSS Headphones","offers":[{"title":"Default Title","offer_id":45327353938116,"sku":null,"price":14057.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2685\/4510\/files\/Picture2.png?v=1761765155","url":"https:\/\/abyss-headphones.com\/en-au\/products\/boulder-812-headphone-amplifier-pre-amp-dac-and-streamer","provider":"ABYSS Headphones","version":"1.0","type":"link"}