{"product_id":"topping-a900-ultra-flagship-headphone-amplifier","title":"TOPPING A900 Ultra-Flagship Headphone Amplifier","description":"\u003ch1\u003e\n \u003cstrong\u003e\u003cem\u003e \u003c\/em\u003e\u003c\/strong\u003e\u003cstrong\u003e\u003c\/strong\u003e\u003cstrong\u003eUltra-flagship power, precision, and balance\u003c\/strong\u003e\n \u003c\/h1\u003e\n \u003cdiv\u003eThe TOPPING A900 is an ultra-flagship headphone amplifier designed for listeners who want massive power, sonic precision, and the satisfaction of fully-balanced, reference-level audio. With a six-channel T'ang-ku-la circuit, a true differential architecture, 151dB SNR, and a peak output of 22,000mW x2 @16Ω, the A900 delivers clean, powerful sound and remarkable control over any pair of headphones or monitors. \u003c\/div\u003e\n \u003ch2\u003e\u003cstrong\u003eMassive 22,000mW x2 output power\u003c\/strong\u003e\u003c\/h2\u003e\n \u003cdiv\u003eWith up to 22,000mW per channel at 16Ω, the A900 has headroom for even the most demanding headphones. Thanks to the patented T’ang-ku-la architecture, it minimizes distortion, lowers heat, and reduces noise. This is pure power against a black backdrop, with THD below 0.00003% and a 151dB SNR.\u003c\/div\u003e\n \u003ch2\u003e\u003cstrong\u003eT’ang-ku-la architecture\u003c\/strong\u003e\u003c\/h2\u003e\n \u003cdiv\u003eAt the heart of the A900 is the patented three-stage feedback T’ang-ku-la circuit. It uses six channels of fully differential amplification to maintain balance all the way from source to output. This design cuts circuit noise and high-frequency distortion while boosting reliability and lowering thermal noise. The result is greater dynamic range, cooler operation, and a sound that stays clean and controlled. \u003c\/div\u003e\n \u003ch2\u003e\u003cstrong\u003eEvery headphone connection you need\u003c\/strong\u003e\u003c\/h2\u003e\n \u003cdiv\u003eThe A900 offers six physical headphone outputs, including 6.35mm single-ended, 4.4mm balanced, 4-pin XLR balanced, and dual 3-pin balanced. Premium connectors from Neutrik and Pentaconn ensure tight, reliable contact. You can configure outputs as independent or simultaneous, so you can test or monitor multiple headphones without swapping cables. \u003c\/div\u003e\n \u003ch2\u003e\u003cstrong\u003ePreamp mode when you want it\u003c\/strong\u003e\u003c\/h2\u003e\n \u003cdiv\u003eFlip the A900 into dedicated preamp mode and use its balanced XLR outputs to feed a power amp or monitors. You get the same flagship-level performance with THD+N below 0.000055% and up to 60Vpp output. \u003c\/div\u003e\n \u003ch2\u003e\u003cstrong\u003eSmooth, balanced volume control\u003c\/strong\u003e\u003c\/h2\u003e\n \u003cdiv\u003eVolume is handled by a fully-balanced relay-based system with 0.5dB steps and channel crosstalk as low as -153dB. That means every turn of the knob gives you precise control without drift or bleed; just smooth, predictable adjustments and beautifully separated channels.\u003c\/div\u003e\n \u003ch2\u003e\u003cstrong\u003eA display you’ll actually use\u003c\/strong\u003e\u003c\/h2\u003e\n \u003cdiv\u003eThe A900’s 2-inch full-color display provides useful, at-a-glance info: real-time playback details, FFT spectrum, or a VU meter. You can choose from nine background colors and switch between display modes easily. On the right, three touch buttons and a responsive knob let you navigate and control settings quickly and easily.\u003c\/div\u003e\n \u003ch2\u003e\u003cstrong\u003eA remote control, done right\u003c\/strong\u003e\u003c\/h2\u003e\n \u003cdiv\u003eThe included remote is machined from a single block of aluminum and finished with sandblasting. It feels substantial, looks good, and gives you control at a distance. \u003c\/div\u003e\n \u003ch2\u003e\u003cstrong\u003eClean power, low noise\u003c\/strong\u003e\u003c\/h2\u003e\n \u003cdiv\u003eThe A900’s power supply is physically isolated between digital and analog circuits. This keeps interference down and voltage steady, so your music stays the focus.\u003c\/div\u003e\n \u003ch3\u003e\u003cstrong\u003eProduct highlights\u003c\/strong\u003e\u003c\/h3\u003e\n \u003cdiv\u003e\n \u003cul\u003e\n \u003cli\u003e\n \u003cp\u003eSix-channel T’ang-ku-la circuit with patented three-stage feedback\u003c\/p\u003e\n \u003c\/li\u003e\n \u003cli\u003e\n \u003cp\u003eFully balanced differential architecture\u003c\/p\u003e\n \u003c\/li\u003e\n \u003cli\u003e\n \u003cp\u003e22,000mW x2 @16Ω output power\u003c\/p\u003e\n \u003c\/li\u003e\n \u003cli\u003e\n \u003cp\u003eTHD+N \u0026lt;0.00003% across the band (90kBW)\u003c\/p\u003e\n \u003c\/li\u003e\n \u003cli\u003e\n \u003cp\u003eSNR\/DNR up to 151dB\u003c\/p\u003e\n \u003c\/li\u003e\n \u003cli\u003e\n \u003cp\u003eBalanced relay-based volume control with 0.5dB steps\u003c\/p\u003e\n \u003c\/li\u003e\n \u003cli\u003e\n \u003cp\u003eSix headphone outputs: 6.35mm, 4.4mm, 4-pin XLR, dual 3-pin XLR\u003c\/p\u003e\n \u003c\/li\u003e\n \u003cli\u003e\n \u003cp\u003eSupports independent or simultaneous output configurations\u003c\/p\u003e\n \u003c\/li\u003e\n \u003cli\u003e\n \u003cp\u003ePreamp mode with balanced XLR outputs\u003c\/p\u003e\n \u003c\/li\u003e\n \u003cli\u003e\n \u003cp\u003eFull-color display with customizable modes and colors\u003c\/p\u003e\n \u003c\/li\u003e\n \u003cli\u003e\n \u003cp\u003ePremium Neutrik and Pentaconn connectors\u003c\/p\u003e\n \u003c\/li\u003e\n \u003cli\u003e\n \u003cp\u003eIsolated power supply for analog\/digital circuits\u003c\/p\u003e\n \u003c\/li\u003e\n \u003cli\u003e\n \u003cp\u003ePrecision-machined aluminum remote control\u003c\/p\u003e\n \u003c\/li\u003e\n \u003c\/ul\u003e\n \u003c\/div\u003e\n \u003ch3\u003e\u003cstrong\u003eSpecs\u003c\/strong\u003e\u003c\/h3\u003e\n \u003cp\u003e\u003cstrong\u003eA900 Headphone Amplifier Specifications\u003c\/strong\u003e\u003c\/p\u003e\n \u003cp\u003e\u003cstrong\u003eBAL IN\/SE OUT\u003c\/strong\u003e\u003c\/p\u003e\n \u003cul\u003e\n \u003cli\u003eTHD+N @1kHz A-wt:\n \u003cul\u003e\n \u003cli\u003e\u0026lt;0.000060% @Output=500mW (32Ω)\u003c\/li\u003e\n \u003cli\u003e\u0026lt;0.000055% @Output=80mW (300Ω)\u003c\/li\u003e\n \u003c\/ul\u003e\n \u003c\/li\u003e\n \u003cli\u003eTHD+N @20-20kHz 90kBW:\n \u003cul\u003e\n \u003cli\u003e\u0026lt;0.00006% @Output=500mW (32Ω)\u003c\/li\u003e\n \u003cli\u003e\u0026lt;0.00005% @Output=80mW (300Ω)\u003c\/li\u003e\n \u003c\/ul\u003e\n \u003c\/li\u003e\n \u003cli\u003eSNR @MAX OUT 1kHz A-wt: 143dB\u003c\/li\u003e\n \u003cli\u003eDynamic Range @1kHz A-wt: 143dB\u003c\/li\u003e\n \u003cli\u003eFrequency Response:\n \u003cul\u003e\n \u003cli\u003e20Hz-40kHz (±0.05dB)\u003c\/li\u003e\n \u003cli\u003e10Hz-200kHz (±0.1dB)\u003c\/li\u003e\n \u003c\/ul\u003e\n \u003c\/li\u003e\n \u003cli\u003eOutput Level:\n \u003cul\u003e\n \u003cli\u003e30 Vpp @G=L\u003c\/li\u003e\n \u003cli\u003e30 Vpp @G=M\u003c\/li\u003e\n \u003cli\u003e30 Vpp @G=H\u003c\/li\u003e\n \u003c\/ul\u003e\n \u003c\/li\u003e\n \u003cli\u003eAP measured noise level @A-wt:\n \u003cul\u003e\n \u003cli\u003e\u0026lt;0.7uVrms @G=L\u003c\/li\u003e\n \u003cli\u003e\u0026lt;0.9uVrms @G=M\u003c\/li\u003e\n \u003cli\u003e\u0026lt;1.5uVrms @G=H\u003c\/li\u003e\n \u003c\/ul\u003e\n \u003c\/li\u003e\n \u003cli\u003eActual noise level @A-wt:\n \u003cul\u003e\n \u003cli\u003e\u0026lt;0.3uVrms @G=L\u003c\/li\u003e\n \u003cli\u003e\u0026lt;0.7uVrms @G=M\u003c\/li\u003e\n \u003cli\u003e\u0026lt;1.4uVrms @G=H\u003c\/li\u003e\n \u003c\/ul\u003e\n \u003c\/li\u003e\n \u003cli\u003eChannel Crosstalk @A-wt: -105dB\u003c\/li\u003e\n \u003cli\u003eInput sensitivity:\n \u003cul\u003e\n \u003cli\u003e22.0Vrms @G=L\u003c\/li\u003e\n \u003cli\u003e7.0Vrms @G=M\u003c\/li\u003e\n \u003cli\u003e2.1Vrms @G=H\u003c\/li\u003e\n \u003c\/ul\u003e\n \u003c\/li\u003e\n \u003cli\u003eGain:\n \u003cul\u003e\n \u003cli\u003e-6.1dB @G=L\u003c\/li\u003e\n \u003cli\u003e+4.3dB @G=M\u003c\/li\u003e\n \u003cli\u003e+13.8dB @G=H\u003c\/li\u003e\n \u003c\/ul\u003e\n \u003c\/li\u003e\n \u003cli\u003eOutput Impedance: \u0026lt;0.1Ω\u003c\/li\u003e\n \u003cli\u003eOutput Power:\n \u003cul\u003e\n \u003cli\u003e6000mW x 2 @16Ω THD+N\u0026lt;0.1%\u003c\/li\u003e\n \u003cli\u003e3000mW x 2 @32Ω THD+N\u0026lt;0.1%\u003c\/li\u003e\n \u003cli\u003e1550mW x 2 @64Ω THD+N\u0026lt;0.1%\u003c\/li\u003e\n \u003cli\u003e660mW x 2 @150Ω THD+N\u0026lt;0.1%\u003c\/li\u003e\n \u003cli\u003e330mW x 2 @300Ω THD+N\u0026lt;0.1%\u003c\/li\u003e\n \u003cli\u003e165mW x 2 @600Ω THD+N\u0026lt;0.1%\u003c\/li\u003e\n \u003c\/ul\u003e\n \u003c\/li\u003e\n \u003cli\u003eAdapter Impedance: \u0026gt;8Ω\u003c\/li\u003e\n \u003c\/ul\u003e\n \u003cp\u003e\u003cstrong\u003eBAL IN\/BAL OUT\u003c\/strong\u003e\u003c\/p\u003e\n \u003cul\u003e\n \u003cli\u003eTHD+N @1kHz A-wt:\n \u003cul\u003e\n \u003cli\u003e\u0026lt;0.000060% @Output=500mW (32Ω)\u003c\/li\u003e\n \u003cli\u003e\u0026lt;0.000055% @Output=80mW (300Ω)\u003c\/li\u003e\n \u003c\/ul\u003e\n \u003c\/li\u003e\n \u003cli\u003eTHD+N @20-20kHz 90kBW:\n \u003cul\u003e\n \u003cli\u003e\u0026lt;0.00004% @Output=500mW (32Ω)\u003c\/li\u003e\n \u003cli\u003e\u0026lt;0.00003% @Output=80mW (300Ω)\u003c\/li\u003e\n \u003c\/ul\u003e\n \u003c\/li\u003e\n \u003cli\u003eSNR @MAX OUT 1kHz A-wt: 151dB\u003c\/li\u003e\n \u003cli\u003eDynamic Range @1kHz A-wt: 151dB\u003c\/li\u003e\n \u003cli\u003eFrequency Response:\n \u003cul\u003e\n \u003cli\u003e20Hz-40kHz (±0.05dB)\u003c\/li\u003e\n \u003cli\u003e10Hz-200kHz (±0.1dB)\u003c\/li\u003e\n \u003c\/ul\u003e\n \u003c\/li\u003e\n \u003cli\u003eOutput Level:\n \u003cul\u003e\n \u003cli\u003e60 Vpp @G=L\u003c\/li\u003e\n \u003cli\u003e60 Vpp @G=M\u003c\/li\u003e\n \u003cli\u003e60 Vpp @G=H\u003c\/li\u003e\n \u003c\/ul\u003e\n \u003c\/li\u003e\n \u003cli\u003eAP measured noise level @A-wt:\n \u003cul\u003e\n \u003cli\u003e\u0026lt;0.7uVrms @G=L\u003c\/li\u003e\n \u003cli\u003e\u0026lt;1.2uVrms @G=M\u003c\/li\u003e\n \u003cli\u003e\u0026lt;2.5uVrms @G=H\u003c\/li\u003e\n \u003c\/ul\u003e\n \u003c\/li\u003e\n \u003cli\u003eActual noise level @A-wt:\n \u003cul\u003e\n \u003cli\u003e\u0026lt;0.3uVrms @G=L\u003c\/li\u003e\n \u003cli\u003e\u0026lt;1.0uVrms @G=M\u003c\/li\u003e\n \u003cli\u003e\u0026lt;2.3uVrms @G=H\u003c\/li\u003e\n \u003c\/ul\u003e\n \u003c\/li\u003e\n \u003cli\u003eChannel Crosstalk @A-wt: -153dB\u003c\/li\u003e\n \u003cli\u003eInput sensitivity:\n \u003cul\u003e\n \u003cli\u003e22.0Vrms @G=L\u003c\/li\u003e\n \u003cli\u003e7.0Vrms @G=M\u003c\/li\u003e\n \u003cli\u003e2.1Vrms @G=H\u003c\/li\u003e\n \u003c\/ul\u003e\n \u003c\/li\u003e\n \u003cli\u003eGain:\n \u003cul\u003e\n \u003cli\u003e-0.1dB @G=L\u003c\/li\u003e\n \u003cli\u003e+10.3dB @G=M\u003c\/li\u003e\n \u003cli\u003e+19.8dB @G=H\u003c\/li\u003e\n \u003c\/ul\u003e\n \u003c\/li\u003e\n \u003cli\u003eOutput Impedance: \u0026lt;0.1Ω\u003c\/li\u003e\n \u003cli\u003eOutput Power:\n \u003cul\u003e\n \u003cli\u003e22000mW x 2 @16Ω THD+N\u0026lt;0.1%\u003c\/li\u003e\n \u003cli\u003e14000mW x 2 @32Ω THD+N\u0026lt;0.1%\u003c\/li\u003e\n \u003cli\u003e7000mW x 2 @64Ω THD+N\u0026lt;0.1%\u003c\/li\u003e\n \u003cli\u003e3000mW x 2 @150Ω THD+N\u0026lt;0.1%\u003c\/li\u003e\n \u003cli\u003e1500mW x 2 @300Ω THD+N\u0026lt;0.1%\u003c\/li\u003e\n \u003cli\u003e750mW x 2 @600Ω THD+N\u0026lt;0.1%\u003c\/li\u003e\n \u003c\/ul\u003e\n \u003c\/li\u003e\n \u003c\/ul\u003e\n \u003cp\u003e\u003cstrong\u003eA900 Pre-amplifier Specifications\u003c\/strong\u003e\u003c\/p\u003e\n \u003cdiv\u003e\n \u003cul\u003e\n \u003cli\u003e\n \u003cp\u003eTHD+N @1kHz A-wt: \u0026lt;0.000055%\u003c\/p\u003e\n \u003c\/li\u003e\n \u003cli\u003e\n \u003cp\u003eTHD+N @20-20kHz 90kBW: \u0026lt;0.00003%\u003c\/p\u003e\n \u003c\/li\u003e\n \u003cli\u003e\n \u003cp\u003eSNR @MAX OUT 1kHz A-wt: 151dB\u003c\/p\u003e\n \u003c\/li\u003e\n \u003cli\u003e\n \u003cp\u003eDynamic Range @1kHz A-wt: 151dB\u003c\/p\u003e\n \u003c\/li\u003e\n \u003cli\u003e\n \u003cp\u003eFrequency Response:\u003c\/p\u003e\n \u003cul\u003e\n \u003cli\u003e\n \u003cp\u003e20Hz-40kHz (±0.05dB)\u003c\/p\u003e\n \u003c\/li\u003e\n \u003cli\u003e\n \u003cp\u003e20Hz-200kHz (±0.1dB)\u003c\/p\u003e\n \u003c\/li\u003e\n \u003c\/ul\u003e\n \u003c\/li\u003e\n \u003cli\u003e\n \u003cp\u003eOutput Level:\u003c\/p\u003e\n \u003cul\u003e\n \u003cli\u003e\n \u003cp\u003e60 Vpp @G=L\u003c\/p\u003e\n \u003c\/li\u003e\n \u003cli\u003e\n \u003cp\u003e60 Vpp @G=M\u003c\/p\u003e\n \u003c\/li\u003e\n \u003cli\u003e\n \u003cp\u003e60 Vpp @G=H\u003c\/p\u003e\n \u003c\/li\u003e\n \u003c\/ul\u003e\n \u003c\/li\u003e\n \u003cli\u003e\n \u003cp\u003eActual noise level @A-wt:\u003c\/p\u003e\n \u003cul\u003e\n \u003cli\u003e\n \u003cp\u003e\u0026lt;0.7uVrms @G=L\u003c\/p\u003e\n \u003c\/li\u003e\n \u003cli\u003e\n \u003cp\u003e\u0026lt;1.2uVrms @G=M\u003c\/p\u003e\n \u003c\/li\u003e\n \u003cli\u003e\n \u003cp\u003e\u0026lt;2.5uVrms @G=H\u003c\/p\u003e\n \u003c\/li\u003e\n \u003c\/ul\u003e\n \u003c\/li\u003e\n \u003cli\u003e\n \u003cp\u003eChannel Crosstalk @1kHz:\u003c\/p\u003e\n \u003cul\u003e\n \u003cli\u003e\n \u003cp\u003e\u0026lt;0.3uVrms @G=L\u003c\/p\u003e\n \u003c\/li\u003e\n \u003cli\u003e\n \u003cp\u003e\u0026lt;1.0uVrms @G=M\u003c\/p\u003e\n \u003c\/li\u003e\n \u003cli\u003e\n \u003cp\u003e\u0026lt;2.3uVrms @G=H\u003c\/p\u003e\n \u003c\/li\u003e\n \u003c\/ul\u003e\n \u003c\/li\u003e\n \u003cli\u003e\n \u003cp\u003eChannel Crosstalk @1kHz: -153dB\u003c\/p\u003e\n \u003c\/li\u003e\n \u003cli\u003e\n \u003cp\u003eInput sensitivity:\u003c\/p\u003e\n \u003cul\u003e\n \u003cli\u003e\n \u003cp\u003e22.0Vrms @G=L\u003c\/p\u003e\n \u003c\/li\u003e\n \u003cli\u003e\n \u003cp\u003e7.0Vrms @G=M\u003c\/p\u003e\n \u003c\/li\u003e\n \u003cli\u003e\n \u003cp\u003e2.1Vrms @G=H\u003c\/p\u003e\n \u003c\/li\u003e\n \u003c\/ul\u003e\n \u003c\/li\u003e\n \u003cli\u003e\n \u003cp\u003eGain:\u003c\/p\u003e\n \u003cul\u003e\n \u003cli\u003e\n \u003cp\u003e-0.1dB @G=L\u003c\/p\u003e\n \u003c\/li\u003e\n \u003cli\u003e\n \u003cp\u003e+10.3dB @G=M\u003c\/p\u003e\n \u003c\/li\u003e\n \u003cli\u003e\n \u003cp\u003e+19.8dB @G=H\u003c\/p\u003e\n \u003c\/li\u003e\n \u003c\/ul\u003e\n \u003c\/li\u003e\n \u003cli\u003e\n \u003cp\u003eOutput Impedance: 100Ω\u003c\/p\u003e\n \u003c\/li\u003e\n \u003c\/ul\u003e\n \u003c\/div\u003e\n \u003ch3\u003e\u003cstrong\u003eWhat’s included\u003c\/strong\u003e\u003c\/h3\u003e\n \u003cdiv\u003e\n \u003cul\u003e\n \u003cli\u003eA900 headphone amplifier\u003c\/li\u003e\n \u003cli\u003e\u003cspan style=\"font-size: 0.875rem;\"\u003ePremium aluminum remote control\u003c\/span\u003e\u003c\/li\u003e\n \u003cli\u003e\u003cspan style=\"font-size: 0.875rem;\"\u003ePackaging and documentation\u003c\/span\u003e\u003c\/li\u003e\n \u003c\/ul\u003e\n \u003c\/div\u003e","brand":"TOPPING","offers":[{"title":"A900 Amp Only","offer_id":46866215895215,"sku":"APS-1093-1","price":1199.0,"currency_code":"USD","in_stock":true},{"title":"A900 Amp + D900 DAC + FREE Apos Flow Balanced XLR Cable Pair","offer_id":46866215927983,"sku":"APS-1094-1","price":2998.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0734\/6415\/2239\/files\/apos-audio-topping-headphone-amp-topping-a900-ultra-flagship-headphone-amplifier-1178032740_26360c6e-de2b-40cf-a073-305c735768f4.jpg?v=1777716277","url":"https:\/\/freshized.com\/products\/topping-a900-ultra-flagship-headphone-amplifier","provider":"Freshized","version":"1.0","type":"link"}