{"product_id":"topping-a900-ultra-flagship-headphone-amplifier-preamplifier","title":"TOPPING A900 Ultra-Flagship Balanced Headphone Amplifier \u0026 Preamplifier","description":"\u003cp\u003e\u003cstrong\u003eTOPPING A900 Ultra-Flagship Headphone Amplifier \u0026amp; Preamplifier\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe TOPPING A900 is an ultra-flagship headphone amplifier engineered for listeners who demand massive power, sonic precision, and fully balanced, reference-level audio. Built around a six-channel T’ang-ku-la amplifier architecture with a patented three-stage feedback circuit, it delivers a record-breaking 151dB dynamic range, full-band THD as low as 0.00003%, and a peak output of 22,000mW x 2 @16Ω. With six headphone outputs, a dedicated pure preamp mode, a fully balanced relay volume control, and an isolated dual power supply, the A900 brings reference-grade performance to any high-end headphone or two-channel setup.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eOptimized T’ang-ku-la Amplifier Architecture\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eAt the heart of the A900 is TOPPING’s exclusive T’ang-ku-la architecture with a groundbreaking three-stage feedback circuit. This patented technology reduces circuit noise and high-frequency distortion, elevating the dynamic range to an extraordinary 151dB while bringing full-band THD down to a record-breaking 0.00003%. The design also minimizes circuit heat, improving reliability and service life while keeping thermal noise low and performance stable.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSix-Channel Fully Differential Balanced Architecture\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThree T’ang-ku-la modules form a six-channel, fully differential balanced architecture that maintains pure signal integrity from source to output. This true full-link differential balanced amplification ensures unmatched clarity and separation, letting you hear every nuance in your music with a deep, silent background.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eMassive Output Power for Any Headphone\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eWith an unparalleled output power of 22,000mW x 2 @16Ω, the A900 effortlessly drives even the most demanding headphones. Whether you use high-impedance or low-impedance models, the amplifier delivers a massive range of power for precise sound reproduction at every volume level.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA Full Range of Headphone Outputs\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe A900 provides up to six physical headphone outputs covering four mainstream connection standards: 6.35mm single-ended, 4.4mm balanced, 4-pin XLR balanced, and dual 3-pin balanced. Premium-grade connectors from Neutrik and Pentaconn ensure stable, reliable contact, and outputs can be configured as independent or simultaneous for flexible monitoring.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePreamp Functionality for Flagship Performance\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eFlip the A900 into dedicated preamp mode and use its balanced XLR outputs to feed a power amplifier or active monitors. As a preamplifier it matches the headphone amp’s flagship performance, with THD+N below 0.000055% and up to 60Vpp output, making it an ideal companion for high-end two-channel systems.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFully Balanced Relay Volume Control\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eVolume is handled by a fully balanced, relay-based system with precise 0.5dB steps and channel crosstalk as low as -153dB. Every turn of the knob delivers smooth, predictable adjustments with exceptional sonic purity and separation, bringing vocals to life and revealing the finest textures in instruments.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eResponsive and Intuitive Control\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA 2-inch full-color display provides clear, real-time playback information. On the right, three touch-sensitive buttons work seamlessly with the volume knob for fast, intuitive adjustments, and the knob also serves as a customizable function key tailored to your preferences.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDisplay Modes and Themes\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eSwitch effortlessly between multiple display modes such as playback information, FFT spectrum, or VU meter, and choose from 9 background colors to match your aesthetic. The interface gives you real-time feedback on audio performance in the style you prefer.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePremium CNC-Machined Remote Control\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe included remote control is crafted from a single block of high-strength aluminum alloy using precision CNC machining, followed by fine sandblasting for a refined finish. It feels substantial, looks premium, and gives you precise control from a distance.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIsolated Power Supply for Enhanced Stability\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe power supply for the digital processing circuit is physically isolated from the two analog amplification circuits, delivering more stable, reference-grade voltage and effectively reducing interference for cleaner sound reproduction.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eRear Panel Connectivity\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe rear panel features high-quality Neutrik connectors with three sets of stereo combo balanced inputs, ensuring broad compatibility with professional audio equipment for both audiophiles and studio users. Balanced XLR preamp outputs, 12V trigger in\/out, and a firmware upgrade port complete the connectivity picture.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSpecifications\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eAmplifier Architecture:\u003c\/strong\u003e Six-channel T’ang-ku-la circuit with patented three-stage feedback, fully differential balanced\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutput Power (BAL IN\/BAL OUT):\u003c\/strong\u003e 22000mW x 2 @16Ω; 14000mW x 2 @32Ω; 7000mW x 2 @64Ω; 3000mW x 2 @150Ω; 1500mW x 2 @300Ω; 750mW x 2 @600Ω (THD+N\u0026lt;0.1%)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutput Power (BAL IN\/SE OUT):\u003c\/strong\u003e 6000mW x 2 @16Ω; 3000mW x 2 @32Ω; 1550mW x 2 @64Ω; 660mW x 2 @150Ω; 330mW x 2 @300Ω; 165mW x 2 @600Ω (THD+N\u0026lt;0.1%)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTHD+N @20-20kHz (90kBW):\u003c\/strong\u003e \u0026lt;0.00003% (BAL out, 80mW @300Ω); \u0026lt;0.00006% (SE out, 500mW @32Ω)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSNR @MAX OUT 1kHz (A-wt):\u003c\/strong\u003e 151dB (balanced) \/ 143dB (single-ended)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDynamic Range @1kHz (A-wt):\u003c\/strong\u003e 151dB (balanced) \/ 143dB (single-ended)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFrequency Response:\u003c\/strong\u003e 20Hz-40kHz (±0.05dB); 10Hz-200kHz (±0.1dB)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutput Level:\u003c\/strong\u003e 60 Vpp (balanced) \/ 30 Vpp (single-ended), all gain settings\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAP Measured Noise (A-wt):\u003c\/strong\u003e \u0026lt;0.7µVrms @G=L; \u0026lt;1.2µVrms @G=M; \u0026lt;2.5µVrms @G=H (balanced)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChannel Crosstalk (A-wt):\u003c\/strong\u003e -153dB (balanced) \/ -105dB (single-ended)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInput Sensitivity:\u003c\/strong\u003e 22.0Vrms @G=L; 7.0Vrms @G=M; 2.1Vrms @G=H\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGain:\u003c\/strong\u003e -0.1dB @G=L; +10.3dB @G=M; +19.8dB @G=H (balanced)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutput Impedance:\u003c\/strong\u003e \u0026lt;0.1Ω; adapter impedance \u0026gt;8Ω\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeadphone Outputs:\u003c\/strong\u003e 6.35mm single-ended, 4.4mm balanced, 4-pin XLR balanced, dual 3-pin balanced\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInputs:\u003c\/strong\u003e 3x XLR + 6.35mm TRS combo balanced inputs\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePreamp Outputs:\u003c\/strong\u003e Balanced XLR (up to 60Vpp); THD+N \u0026lt;0.000055% @1kHz (A-wt)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVolume Control:\u003c\/strong\u003e Fully balanced relay-based, 0.5dB steps\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDisplay:\u003c\/strong\u003e 2-inch full-color display with playback info \/ FFT \/ VU modes and 9 background colors\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e12V Trigger:\u003c\/strong\u003e Input + output\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePower Supply:\u003c\/strong\u003e Isolated digital\/analog supplies\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDimensions:\u003c\/strong\u003e 33.0 x 20.0 x 5.7 cm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAccessories:\u003c\/strong\u003e Premium CNC-machined aluminum remote control, AC cable, documentation\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eWhat's Included\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eTOPPING A900 headphone amplifier\u003c\/li\u003e\n\u003cli\u003ePremium CNC-machined aluminum remote control\u003c\/li\u003e\n\u003cli\u003eAC power cable\u003c\/li\u003e\n\u003cli\u003eUser manual and documentation\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0769\/7085\/2544\/files\/topping-a900-pure-design-superior-performance-hero.jpg?v=1787131257\" alt=\"topping a900 pure design superior performance hero\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0769\/7085\/2544\/files\/topping-a900-six-channel-tang-ku-la-circuit-overview.jpg?v=1787131258\" alt=\"topping a900 six channel tang ku la circuit overview\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0769\/7085\/2544\/files\/topping-a900-optimized-tang-ku-la-amplifier-architecture.jpg?v=1787131259\" alt=\"topping a900 optimized tang ku la amplifier architecture\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0769\/7085\/2544\/files\/topping-a900-focus-on-the-music-design.jpg?v=1787131255\" alt=\"topping a900 focus on the music design\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0769\/7085\/2544\/files\/topping-a900-refined-industrial-design.jpg?v=1787131257\" alt=\"topping a900 refined industrial design\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0769\/7085\/2544\/files\/topping-a900-rear-panel-neutrik-combo-inputs.jpg?v=1787131256\" alt=\"topping a900 rear panel neutrik combo inputs\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0769\/7085\/2544\/files\/topping-a900-headphone-outputs-635mm-44mm-xlr.jpg?v=1787131256\" alt=\"topping a900 headphone outputs 635mm 44mm xlr\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0769\/7085\/2544\/files\/topping-a900-preamp-mode-xlr-outputs.jpg?v=1787131257\" alt=\"topping a900 preamp mode xlr outputs\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0769\/7085\/2544\/files\/topping-a900-responsive-control-touch-buttons.jpg?v=1787131255\" alt=\"topping a900 responsive control touch buttons\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0769\/7085\/2544\/files\/topping-a900-display-modes-fft-vu-9-colors.jpg?v=1787131258\" alt=\"topping a900 display modes fft vu 9 colors\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0769\/7085\/2544\/files\/topping-a900-cnc-aluminum-remote-control.jpg?v=1787131257\" alt=\"topping a900 cnc aluminum remote control\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0769\/7085\/2544\/files\/topping-a900-fully-balanced-relay-volume-control.jpg?v=1787131257\" alt=\"topping a900 fully balanced relay volume control\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0769\/7085\/2544\/files\/topping-a900-isolated-power-supply.jpg?v=1787131257\" alt=\"topping a900 isolated power supply\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0769\/7085\/2544\/files\/topping-a900-flagship-pairing-with-d900-dac.jpg?v=1787131258\" alt=\"topping a900 flagship pairing with d900 dac\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0769\/7085\/2544\/files\/topping-a900-interfaces-and-buttons-diagram.jpg?v=1787131256\" alt=\"topping a900 interfaces and buttons diagram\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0769\/7085\/2544\/files\/topping-a900-dimensions-and-package-contents.jpg?v=1787131259\" alt=\"topping a900 dimensions and package contents\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0769\/7085\/2544\/files\/topping-a900-ultra-flagship-performance-banner.jpg?v=1787131259\" alt=\"topping a900 ultra flagship performance banner\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0769\/7085\/2544\/files\/topping-a900-snr-measurement-xlr-out.jpg?v=1787131259\" alt=\"topping a900 snr measurement xlr out\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0769\/7085\/2544\/files\/topping-a900-dnr-thd-n-power-measurement.jpg?v=1787131259\" alt=\"topping a900 dnr thd n power measurement\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0769\/7085\/2544\/files\/topping-a900-thd-frequency-response-fft-measurement.jpg?v=1787131259\" alt=\"topping a900 thd frequency response fft measurement\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0769\/7085\/2544\/files\/topping-a900-multitone-snr-dnr-preamp-measurement.jpg?v=1787131260\" alt=\"topping a900 multitone snr dnr preamp measurement\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0769\/7085\/2544\/files\/topping-a900-specifications-measurement-chart.jpg?v=1787131259\" alt=\"topping a900 specifications measurement chart\"\u003e\u003c\/p\u003e","brand":"TOPPING","offers":[{"title":"Default Title","offer_id":48844490768576,"sku":"10017259","price":9588.87,"currency_code":"HKD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0769\/7085\/2544\/files\/topping-a900-ultra-flagship-headphone-amplifier-flagship-stack.jpg?v=1787131258","url":"https:\/\/hifichic.com\/products\/topping-a900-ultra-flagship-headphone-amplifier-preamplifier","provider":"HIFICHIC","version":"1.0","type":"link"}