{"product_id":"benchmark-hpa4-headphone-line-amplifier","title":"Benchmark HPA4 Headphone \/ Line Amplifier","description":"\u003cp\u003eBenchmark Media Systems, Inc. and THX, Ltd. have partnered to introduce the Benchmark HPA4 headphone\/line amplifier featuring THX Achromatic Audio Amplifier (AAA\u003cspan\u003e™\u003c\/span\u003e) technology.\u003c\/p\u003e\n\u003cp\u003eFeaturing the flagship THX-888 amplifier design, the revolutionary HPA4 headphone amplifier incorporates the same patented THX technology that Benchmark uses in the AHB2 power amplifier.\u003c\/p\u003e\n\u003cp\u003eThe 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\u003ch2\u003e\u003cstrong\u003eFeatures\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eTHX-888\u003cspan\u003e (AAA™)\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003eHeadphone Amplifier\u003c\/li\u003e\n\u003cli\u003eBenchmark Low-Noise Line Amplifier\u003c\/li\u003e\n\u003cli\u003e256-Step Fully-Balanced Relay Gain Control, 0.5 dB Steps\u003c\/li\u003e\n\u003cli\u003ePrecision Timed Relay Closures\u003c\/li\u003e\n\u003cli\u003ePrecision Metal Film Resistors\u003c\/li\u003e\n\u003cli\u003eGold-Contact Relays\u003c\/li\u003e\n\u003cli\u003eBalanced and Unbalanced I\/O\u003c\/li\u003e\n\u003cli\u003e6 Watts into 16 Ohm Headphones\u003c\/li\u003e\n\u003cli\u003e11.5 Vrms into 300 Ohm Headphones\u003c\/li\u003e\n\u003cli\u003e0.01 Hz to 500 kHz\u003c\/li\u003e\n\u003cli\u003eSNR \u0026gt; 135 dB\u003c\/li\u003e\n\u003cli\u003eTHD \u0026lt; 125 dB (0.00006%) under full load\u003c\/li\u003e\n\u003cli\u003eShort-Circuit Protection\u003c\/li\u003e\n\u003cli\u003eDC Protection\u003c\/li\u003e\n\u003cli\u003eOver-Voltage Protection\u003c\/li\u003e\n\u003cli\u003eOver-Current Protection\u003c\/li\u003e\n\u003cli\u003eThermal Protection\u003c\/li\u003e\n\u003cli\u003eTouch Screen Control\u003c\/li\u003e\n\u003cli\u003eIR Remote Control (optional)\u003c\/li\u003e\n\u003cli\u003e2 Balanced Stereo Line Inputs\u003c\/li\u003e\n\u003cli\u003e2 Unbalanced Stereo Line Inputs\u003c\/li\u003e\n\u003cli\u003e1 Balanced Stereo Line Output\u003c\/li\u003e\n\u003cli\u003e1 Unbalanced Stereo Line Output\u003c\/li\u003e\n\u003cli\u003e1 Balanced Mono Sum Output\u003c\/li\u003e\n\u003cli\u003e2 Bidirectional 12V Trigger Ports\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e\u003cstrong\u003eSpecifications\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003e(using balanced inputs at +24 dBu)\u003c\/p\u003e\n\u003ch3\u003eTHX-888\u003cspan\u003e™ \u003c\/span\u003eHeadphone Output:\u003c\/h3\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 Current, 1.5 A\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\u003ch3\u003eBalanced Line Outputs:\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eTHD \u0026lt; -125 dB (0.00006%)\u003c\/li\u003e\n\u003cli\u003eSNR \u0026gt; 135 dB, unweighted, 20-20 kHz\u003c\/li\u003e\n\u003cli\u003eSNR \u0026gt; 137 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 60 Ohms\u003c\/li\u003e\n\u003cli\u003eOutput Noise \u0026lt; 1.9 uV at Unity Gain, 20-20 kHz\u003c\/li\u003e\n\u003cli\u003eMaximum Input and Output Voltage, 20 Vrms (+28 dBu)\u003c\/li\u003e\n\u003cli\u003eCrosstalk \u0026lt; -133 dB @ 1 kHz, -116 dB @ 10 kHz\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eDimensions:\u003c\/h3\u003e\n\u003cp\u003e8.65\" W x 3.88\" H x 8.33\" D - Including Feet\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e8.65\" W x 3.47\" H x 8.33\" D - Excluding Feet\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003eWeight:\u003c\/h3\u003e\n\u003cp\u003e8.0 lbs., 12 lbs. shipping\u003c\/p\u003e\n\u003ch3\u003ePower:\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e18W Typical Input Power\u003c\/li\u003e\n\u003cli\u003e35W Maximum Input power\u003c\/li\u003e\n\u003cli\u003e0.33 W Standby Power (when off)\u003c\/li\u003e\n\u003cli\u003eInternal Universal Power Supply\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Benchmark","offers":[{"title":"black","offer_id":56215550296450,"sku":null,"price":3599.0,"currency_code":"GBP","in_stock":true},{"title":"silver","offer_id":56215550329218,"sku":null,"price":3599.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0954\/6652\/0962\/files\/HPA4_Black_ISO_Shopify_1200x_5f8e366f-92a6-4e31-9d24-0b36beb78b93.webp?v=1768427595","url":"https:\/\/premiumhomeaudio.co.uk\/products\/benchmark-hpa4-headphone-line-amplifier","provider":"Premium Home Audio","version":"1.0","type":"link"}