{"product_id":"audioengine-hd4-home-music-system-walnut","title":"AUDIOENGINE HD4 HOME MUSIC SYSTEM -  WALNUT","description":"\u003ch5\u003eOverview\u003cbr\u003e\n\u003c\/h5\u003e\n\u003ch4\u003e\n\u003cmeta charset=\"utf-8\"\u003e \u003cb\u003eAudioengine HD4 Bluetooth Speaker System\u003c\/b\u003e\n\u003c\/h4\u003e\n\u003cp\u003e\u003cmeta charset=\"UTF-8\"\u003e\u003cspan\u003eDesigned to connect to virtually any device, the walnut \u003c\/span\u003e\u003cb\u003eAudioengine HD4 Bluetooth Speaker System \u003c\/b\u003e\u003cspan\u003eprovides a 3.5mm input, a stereo RCA input, a micro-USB input, and Bluetooth connectivity with aptX HD support, which allows for wireless connectivity with your compatible devices. Each speaker consists of a 4\" woofer and a 0.75\" tweeter and output up to 30W per channel RMS, or 60W per channel peak for room-filling sound. For your convenience, all connectivity is via the powered left speaker, which connects to the passive right speaker with speaker wire.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch4\u003eCabinets\u003c\/h4\u003e\n\u003cp\u003eTo minimize unwanted resonances and distortion, Audioengine cabinets have thick high-resin MDF walls with extensive internal bracing. Heavy internal sound-damping material is used to reduce unwanted sound reflections inside the cabinet. All cabinet edges are rounded which look great and reduce high-frequency diffraction effects on the front baffles. The P4 cabinet contains tuned, front-port slots.\u003c\/p\u003e\n\u003ch4\u003eFurniture-Grade Finishes\u003c\/h4\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"feature_BGP5ZCbKOY\"\u003e\n\u003cdiv class=\"featureHeader_BGP5ZCbKOY\"\u003eThe HD4 cabinets are available in several handsome finishes, including walnut veneers as well as satin black paint, offering options for complementing room furnishings. Also included are detachable grilles that add further aesthetic advantages as they are firmly held in place with hidden neodymium magnets for a clean look.\u003c\/div\u003e\n\u003cdiv class=\"featureHeader_BGP5ZCbKOY\"\u003e\u003c\/div\u003e\n\u003ch4 class=\"featureHeader_BGP5ZCbKOY\"\u003eCustom Components\u003c\/h4\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"feature_BGP5ZCbKOY\"\u003e\n\u003cdiv\u003eAudioengine designs and manufactures their own tweeters, woofers, and other critical components. In other words, these are not box-built speakers with off-the-shelf parts, but custom-designed to Audioengine's specifications. What they do not fabricate directly in their factory, they have made to their designs (parts such as transformers, magnets, and wiring harnesses, for example). The cabinets, drivers, bass port designs, amplifiers, and crossovers are all painstakingly tuned together for each Audioengine model. This, in turn, makes for a much more efficient system that requires much less power than passive speakers and a separate integrated amplifier or similar A\/V components.\u003c\/div\u003e\n\u003cdiv\u003e\u003c\/div\u003e\n\u003ch4\u003eBased on Studio Monitor Designs\u003c\/h4\u003e\n\u003cdiv\u003e\u003c\/div\u003e\n\u003cdiv\u003eStudio monitor speakers are used by producers and engineers in recording and production studios. They are designed with a theoretical flat frequency response which allows the engineer to create a final mix in such a way that the recorded music will sound good on most other speakers. Although Audioengine speakers are not designed to be up-close \"nearfield\" studio monitors, they carry over much of the same higher-end technology, components, and design philosophy for all Audioengine speaker systems.\u003c\/div\u003e\n\u003cdiv\u003e\u003c\/div\u003e\n\u003ch4\u003eHigh-Quality Bluetooth Audio\u003c\/h4\u003e\n\u003cdiv\u003e\u003c\/div\u003e\n\u003cdiv\u003eThe Bluetooth built into the HD4 powered speakers features aptX HD coding, which is an advanced Bluetooth audio codec with very impressive sound. And even if your phone or tablet does not have aptX HD, the HD4 Bluetooth solution is backwards-compatible with SBC and AAC codecs, as well as standard aptX, so you can wirelessly stream music from any Bluetooth-enabled device and still enjoy all your music. High-fidelity Bluetooth aptX HD that really works and sounds great. Here is why:\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"feature_BGP5ZCbKOY\"\u003e\n\u003cdiv class=\"js-injected-html text_BGP5ZCbKOY\"\u003e\n\u003cul\u003e\n\u003cli\u003eExtended-range wireless: Most Bluetooth implementations have very limited range, typically within just one room. But with careful signal management circuitry and antenna tuning, we offer a superior solution that has up to 3 times the range of standard Bluetooth for multi-room use, with no degradation in audio quality.\u003c\/li\u003e\n\u003cli\u003e24-bit DAC: The HD4 Bluetooth receiver and USB input both utilize the PCM 5102 DAC, widely known for its low noise and high fidelity. The PCM 5102 is used as an upsampling DAC and will pad all bit depths to 24-bit, achieving a higher signal-to-noise ratio and lower noise floor. Due to the high signal-to-noise specs of the PCM 5102, the fact that digital signal is upsampled to 24-bit as well as the added benefit of onboard triple redundancy power source conversion and filtering the HD4 Bluetooth implementation presents impressive low noise and low distortion characteristics with a noticeable improvement over other Bluetooth devices.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003ch4 class=\"js-injected-html text_BGP5ZCbKOY\"\u003eHD3 Headphone Amplifier\u003c\/h4\u003e\n\u003cdiv class=\"js-injected-html text_BGP5ZCbKOY\"\u003eThe HD4 contains a high-performance headphone amplifier based on the OPA2134 low-noise opamp. This amp is able to provide low-impedance, high-fidelity audio, and a 2-volt output which easily drives a wide range of headphones.\u003c\/div\u003e\n\u003cdiv class=\"js-injected-html text_BGP5ZCbKOY\"\u003e\u003c\/div\u003e\n\u003ch4 class=\"js-injected-html text_BGP5ZCbKOY\"\u003eAmplifier Design\u003c\/h4\u003e\n\u003cdiv class=\"js-injected-html text_BGP5ZCbKOY\"\u003eThe amplifiers in powered Audioengine speakers are located in the left speaker and are a conservatively rated class A\/B analog monoblock design. This is a more traditional speaker\/amplifier configuration which provides excellent quality audio and greater flexibility. All circuit boards for the power and preamp sections are vertically mounted for maximum mechanical shock protection.\u003c\/div\u003e\n\u003cdiv class=\"js-injected-html text_BGP5ZCbKOY\"\u003e\u003c\/div\u003e\n\u003ch4 class=\"js-injected-html text_BGP5ZCbKOY\"\u003eDriver Designs\u003c\/h4\u003e\n\u003cdiv class=\"js-injected-html text_BGP5ZCbKOY\"\u003eAudioengine uses audiophile-quality, ferrofluid-cooled silk dome tweeters with neodymium magnets. Silk tweeters hold up well under high power and the edge-driven design gives very smooth response. The woofers are aramid fiber woven glass composite with rubber surrounds. Aramid fiber is obviously very strong, which means the woofer retains its shape when being driven at high levels.\u003c\/div\u003e\n\u003cdiv class=\"js-injected-html text_BGP5ZCbKOY\"\u003e\u003c\/div\u003e\n\u003ch4 class=\"js-injected-html text_BGP5ZCbKOY\"\u003eShielding\u003c\/h4\u003e\n\u003cdiv class=\"js-injected-html text_BGP5ZCbKOY\"\u003eBoth drivers are directly video shielded and allow the user to place the speakers within a few inches of a video monitor. This shielding also offers protection for hard-drive digital music players.\u003c\/div\u003e\n\u003cdiv class=\"js-injected-html text_BGP5ZCbKOY\"\u003e\u003c\/div\u003e\n\u003ch4 class=\"js-injected-html text_BGP5ZCbKOY\"\u003eHeadphone Amp\u003c\/h4\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"feature_BGP5ZCbKOY\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"js-injected-html text_BGP5ZCbKOY\"\u003e\n\u003cul\u003e\n\u003cli\u003e2 VRMS full-scale headphone output level\u003c\/li\u003e\n\u003cli\u003e2 ohm output impedance\u003c\/li\u003e\n\u003cli\u003e10 ohm to 10 kilohm recommended headphone impedance level\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003ch4 class=\"js-injected-html text_BGP5ZCbKOY\"\u003eAdditional Features\u003cbr\u003e\n\u003c\/h4\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"js-injected-html text_BGP5ZCbKOY\"\u003e\n\u003cul\u003e\n\u003cli\u003e\u0026lt;50 dB crosstalk\u003c\/li\u003e\n\u003cli\u003eOutput current limiting, thermal over-temperature, and power on\/off transient protection\u003c\/li\u003e\n\u003cli\u003eInput data rate determined by Bluetooth\u003c\/li\u003e\n\u003cli\u003e~30 ms wireless latency\u003c\/li\u003e\n\u003cli\u003eMicro-USB 1.1 input\u003c\/li\u003e\n\u003cli\u003e0.7\" thick MDF cabinets with real wood veneer\u003c\/li\u003e\n\u003cli\u003eTweeters with neodymium magnets\u003c\/li\u003e\n\u003cli\u003eAramid fiber woofers with advanced voice coils\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003ch4 class=\"js-injected-html text_BGP5ZCbKOY\"\u003eEfficient Integrated Design\u003c\/h4\u003e\n\u003cdiv class=\"js-injected-html text_BGP5ZCbKOY\"\u003eThe speaker cabinets, drivers, innovative bass port designs, amplifiers, and passive crossovers are all critically tuned together for each Audioengine model. This, in turn, makes for a much more efficient system that requires less power than passive speakers and a separate integrated amplifier or similar A\/V components. They build all this goodness into the left speaker cabinet to make it super-easy to connect your smartphone, tablet, computer, TV, network player, or any other audio product.\u003c\/div\u003e\n\u003cdiv class=\"js-injected-html text_BGP5ZCbKOY\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003ch5 class=\"js-injected-html text_BGP5ZCbKOY\"\u003eIn The Box\u003c\/h5\u003e\n\u003cul data-selenium=\"includesInTheBoxList\" class=\"list_K3auZoGE_z\"\u003e\n\u003cli data-selenium=\"includesInTheBoxItem\" class=\"item_gLOflo3mji\"\u003e\u003cspan\u003eAudioengine HD4 Bluetooth Speaker System (Walnut, Pair)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli data-selenium=\"includesInTheBoxItem\" class=\"item_gLOflo3mji\"\u003e\u003cspan\u003e2 x Speaker Grilles\u003c\/span\u003e\u003c\/li\u003e\n\u003cli data-selenium=\"includesInTheBoxItem\" class=\"item_gLOflo3mji\"\u003e\u003cspan\u003ePower Cord\u003c\/span\u003e\u003c\/li\u003e\n\u003cli data-selenium=\"includesInTheBoxItem\" class=\"item_gLOflo3mji\"\u003e\u003cspan\u003eLimited 3-Year Warranty\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch5\u003e\u003cspan\u003eSpecs\u003c\/span\u003e\u003c\/h5\u003e\n\u003ch4 class=\"feature_BGP5ZCbKOY\"\u003eGENERAL SPECIFICATIONS\u003c\/h4\u003e\n\u003cstrong\u003eType\u003c\/strong\u003e\u003cbr\u003ePowered Bluetooth aptX HD speaker system\u003cbr\u003e \u003cbr\u003e\u003cstrong\u003eAmplifier Type\u003c\/strong\u003e\u003cbr\u003eClass AB\u003cbr\u003e \u003cbr\u003e\u003cstrong\u003ePower Output\u003c\/strong\u003e\u003cbr\u003e120 W peak power total (30 W RMS \/ 60 W peak per channel), AES\u003cbr\u003e \u003cbr\u003e\u003cstrong\u003eDrivers\u003c\/strong\u003e\u003cbr\u003e4″ aramid fiber woofers\u003cbr\u003e0.75″ silk dome tweeters\u003cbr\u003e \u003cbr\u003e\u003cstrong\u003eInputs\u003c\/strong\u003e\u003cbr\u003e3.5 mm stereo mini-jack, USB, RCA L\/R, Bluetooth\u003cbr\u003e \u003cbr\u003e\u003cstrong\u003eOutputs\u003c\/strong\u003e\u003cbr\u003eRCA variable line-out, 3.5 mm mini-jack headphone out\u003cbr\u003e \u003cbr\u003e\u003cstrong\u003eInput Voltages\u003c\/strong\u003e\u003cbr\u003e110-240 V 50\/60 Hz auto-switching\u003cbr\u003e \u003cbr\u003e\u003cstrong\u003eSNR\u003c\/strong\u003e\u003cbr\u003e\u0026gt;95 dB (typical A-weighted)\u003cbr\u003e \u003cbr\u003e\u003cstrong\u003eTHD+N\u003c\/strong\u003e\u003cbr\u003e\u0026lt;0.05% at all power settings\u003cbr\u003e \u003cbr\u003e\u003cstrong\u003eCrosstalk\u003c\/strong\u003e\u003cbr\u003e\u0026lt;50 dB\u003cbr\u003e \u003cbr\u003e\u003cstrong\u003eFrequency Response\u003c\/strong\u003e\u003cbr\u003e60 Hz-22 kHz ±1.5 dB\u003cbr\u003e \u003cbr\u003e\u003cstrong\u003eInput Impedence\u003c\/strong\u003e\u003cbr\u003e5K ohms unbalanced\u003cbr\u003e \u003cbr\u003e\u003cstrong\u003eProtection\u003c\/strong\u003e\u003cbr\u003eOutput current limiting, thermal over-temperature, power on\/off transient protection\u003cbr\u003e \u003cbr\u003e\u003cstrong\u003ePower Consumption\u003c\/strong\u003e\u003cbr\u003eIdle: 10W\u003c\/div\u003e\n\u003cdiv\u003e\u003c\/div\u003e\n\u003ch4\u003eBLUETOOTH SPECIFICATIONS\u003c\/h4\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eInternal D\/A Converter\u003c\/strong\u003e\u003cbr\u003ePCM 5102\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003eInput Bit Depth\u003c\/strong\u003e\u003cbr\u003e24 bit (padded)\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003eBluetooth Receiver Type\u003c\/strong\u003e\u003cbr\u003eBluetooth 5.0\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003eSupported Codecs\u003c\/strong\u003e\u003cbr\u003eaptX HD, aptX, AAC, SBC\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003eWireless Operation Range\u003c\/strong\u003e\u003cbr\u003eUp to 100 ft (30 m) typical\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003eInput Data Rate\u003c\/strong\u003e\u003cbr\u003eDetermined by Bluetooth\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003eWireless Latency\u003c\/strong\u003e\u003cbr\u003e~30 milliseconds (ms)\u003c\/div\u003e\n\u003cdiv\u003e\u003c\/div\u003e\n\u003ch4\u003eUSB SPECIFICATIONS\u003c\/h4\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eConnector Type\u003c\/strong\u003e\u003cbr\u003eMicro-USB\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003eUSB Device Class\u003c\/strong\u003e\u003cbr\u003eUSB 1.1 or above\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003eInput Bit Depth\u003c\/strong\u003e\u003cbr\u003e24 bit (padded)\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003eInput Sample Rate\u003c\/strong\u003e\u003cbr\u003e44.1 kHz\/48 kHz\u003c\/div\u003e\n\u003cdiv\u003e\u003c\/div\u003e\n\u003ch4\u003eHEADPHONE AMP SPECIFICATIONS\u003c\/h4\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eHeadphone Amp Type\u003c\/strong\u003e\u003cbr\u003eOPA2134\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003eFull-scale Headphone Output Level\u003c\/strong\u003e\u003cbr\u003e2.0 V RMS\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003eOutput Impedence\u003c\/strong\u003e\u003cbr\u003e2 ohms\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003eRecommended Headphone Impedence Level\u003c\/strong\u003e\u003cbr\u003e10 ohms to 10K ohms\u003c\/div\u003e\n\u003cdiv\u003e\u003c\/div\u003e\n\u003ch4\u003eWEIGHTS AND MEASURES\u003c\/h4\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eDimensions (HWD)\u003c\/strong\u003e\u003cbr\u003eEach speaker – 9″(23 cm) x 5.5″ (14 cm) x 6.5″ (16.5 cm)\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003eWeight\u003c\/strong\u003e\u003cbr\u003eLeft (active) – 7 lb (3.2 kg)\u003cbr\u003eRight (passive) – 5.2 lb (2.4 kg)\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003eTotal Shipping Weight\u003c\/strong\u003e\u003cbr\u003e16 lb (7.3 kg)\u003cbr\u003e\u003cbr\u003eShipping Box Dimensions (LWH)\u003cbr\u003e20″ (51 cm) x 13″ (33 cm) x 15.5″ (39 cm)\u003c\/div\u003e\n\u003cdiv\u003e\u003c\/div\u003e\n\u003ch4\u003eENVIRONMENTAL REQUIREMENTS\u003c\/h4\u003e\n\u003cdiv\u003eOperating temperature: 32 degrees F to 95 degrees F\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cp class=\"feature_BGP5ZCbKOY\"\u003eNon-operating temperature: -4 degrees F to 113 degrees F\u003cbr\u003eRelative humidity: 5% to 95% non-condensing\u003c\/p\u003e\n\u003ch4 class=\"feature_BGP5ZCbKOY\"\u003eMATERIALS AND CONSTRUCTION\u003c\/h4\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e0.7″ (18 mm) thick MDF cabinets with real wood veneer\u003cbr\u003e0.75″ (20 mm) silk dome tweeters with neodymium magnets\u003cbr\u003e4″ (101 mm) aramid fiber woofers with advanced voice coils\u003cbr\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv style=\"font-family: -apple-system, BlinkMacSystemFont, 'San Francisco', 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif; font-size: 1.4em;\" class=\"content\" data-mce-style=\"font-family: -apple-system, BlinkMacSystemFont, 'San Francisco', 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif; font-size: 1.4em;\"\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch5\u003eVideo\u003cbr\u003e\n\u003c\/h5\u003e\n\u003ciframe width=\"560\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/RCcn9eszM-I\" title=\"YouTube video player\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture\" allowfullscreen\u003e\u003c\/iframe\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c\/div\u003e\n\u003cul class=\"tech_spec_listing\"\u003e\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c\/div\u003e","brand":"Audiopacific","offers":[{"title":"Default Title","offer_id":47531469111514,"sku":"AUDIOENGINE-HD4-HOME-MUSIC-SYSTEM-WALNUT","price":399.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0550\/4709\/4490\/files\/audioengine-hd4-powered-bluetooth-speakers-walnut-1_1800x1800_6cd88908-9ba6-46bc-9c38-8350cbf1de6f.jpg?v=1769214427","url":"https:\/\/metaledgemag.com\/products\/audioengine-hd4-home-music-system-walnut","provider":"Metal Edge","version":"1.0","type":"link"}