{"title":"Benchmark","description":null,"products":[{"product_id":"benchmark-headphone-power-amplifiers","title":"Benchmark Headphone Power Amplifiers","description":"\u003ch3\u003e\u003cstrong\u003eHPA4 - Benchmark's Flagship Reference Headphone Amplifier\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eThe HPA4 is Benchmark's newest headphone amplifier. Benchmark Media Systems, Inc. and THX, Ltd. have partnered to introduce the Benchmark HPA4 headphone\/line amplifier featuring THX Achromatic Audio Amplifier (AAA™) technology.\u003cbr\u003e\u003cbr\u003eTHX AAA™ reduces harmonic, intermodulation, and crossover distortion by 20 to 40 dB to guarantee a realistic and fatigue-free listening experience. It accomplishes this using a patented feed-forward topology to null conventional distortion and noise mechanisms, resulting in the world's most linear amplifier. THX AAA allows the amplifier to reach its maximum output power and sound pressure level (SPL) without producing the distortion that normally accompanies increased output levels in traditional amplifiers.\u003cbr\u003e\u003cbr\u003eFeaturing the flagship THX-888 amplifier design, the revolutionary HPA4 headphone amplifier incorporates the same THX AAA technology that Benchmark uses in the AHB2 power amplifier. The HPA4 delivers sonic perfection. Hear the music without any contamination from electronic noise or distortion. The HPA4 delivers power, audio fidelity, speed and accuracy over an utterly silent background.\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe THX-888\u003c\/span\u003e\u003cspan\u003e amplifier \u003c\/span\u003e\u003cspan\u003eis driven by a Benchmark line amplifier that features relay gain control, relay input selection, and relay muting. The line amplifier incorporates the finest gold-contact relays available. The gain control has 256 steps in 0.5 dB increments. It also features a balance control. Relay closures are precisely timed to deliver silky-smooth volume changes. No other relay gain control offers this level of precision and performance. The HPA4 includes 4 independent 256-step attenuators: two for the L\u0026amp;R headphone outputs, and two for the L\u0026amp;R line outputs. To make this all happen, the HPA4 includes a total of 64 precision relays.\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eTHD \u0026lt; -125 dB (0.00006%)\u003c\/li\u003e\n\u003cli\u003eSNR \u0026gt; 131 dB, unweighted, 20-20 kHz\u003c\/li\u003e\n\u003cli\u003eSNR \u0026gt; 135 dB, A-weighted\u003c\/li\u003e\n\u003cli\u003eFrequency Response - 0.003 dB at 10 Hz, -0.001 dB at 20 kHz\u003c\/li\u003e\n\u003cli\u003e-3 dB Bandwidth exceeds 0.1 Hz to 500 kHz\u003c\/li\u003e\n\u003cli\u003eOutput Impedance, near 0 Ohms\u003c\/li\u003e\n\u003cli\u003eOutput Noise \u0026lt; 2.45 uV at Unity Gain, 20-20 kHz\u003c\/li\u003e\n\u003cli\u003eMaximum Output Power, 6 Watts into 16 Ohms\u003c\/li\u003e\n\u003cli\u003eMaximum Output Voltage, 11.5 Vrms into 300 Ohms\u003c\/li\u003e\n\u003cli\u003eCrosstalk \u0026lt; -133 dB @ 1 kHz, -115 dB @ 10 kHz (XLR4)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eHigh Current and High Voltage\u003c\/strong\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eThe HPA4 easily delivers the high current and high power demanded by low-impedance headphones.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eThe HPA4 delivers the high voltages demanded by low-efficiency headphones.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003eThe HPA4 is designed to drive \u003c\/span\u003e\u003ca title=\"Headphone Impedance and Sensitivity - Application Note\" href=\"http:\/\/benchmarkmedia.com\/blogs\/news\/14017381-headphone-impedance-and-sensitivity\" target=\"_blank\"\u003eall types of headphones\u003c\/a\u003e\u003cspan\u003e with ease.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eWide 0.1 Hz to 200 kHz Frequency Response\u003c\/strong\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eBass extends down below 0.1 Hz.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eHigh frequency response extends beyond 500 kHz.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003eThe \u003c\/span\u003e\u003cspan\u003eHPA4 is fast, detailed, and phase accurate.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eHigh Damping Factor\u003c\/strong\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eThe near 0-Ohm output impedance of the HPA4 provides a very high damping factor.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eThe HPA4 maintains tight control of the headphone drivers.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eDamping providing tight bass control.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003eThe high damping factor \u003c\/span\u003e\u003ca title=\"Headphone Amplifiers Part 1 - Application Note\" href=\"http:\/\/benchmarkmedia.com\/blogs\/news\/12838141-headphone-amplifiers-part-1\" target=\"_blank\"\u003ereduces distortion\u003c\/a\u003e.\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eThe high damping factor provides a smooth and predictable frequency response.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eClean and Quiet\u003c\/strong\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eThe HPA4 maintains less than 0.00006% THD, even while delivering a full 6 W output into a 16-Ohm load.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eThe HPA4 remains remains clean when driving two sets of headphones simultaneously.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Benchmark","offers":[{"title":"Default Title","offer_id":45581329268994,"sku":"","price":28680.0,"currency_code":"HKD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0678\/9516\/5186\/files\/hpa4b.png?v=1729620835"}],"url":"https:\/\/caswshk.com\/collections\/brand-benchmark.oembed","provider":"CAS Workshop Hong Kong","version":"1.0","type":"link"}