{"product_id":"topping-a50-iii-headphone-amplifier","title":"TOPPING A50 III NFCA Headphone Amplifier","description":"\u003cp\u003e\u003cstrong\u003eTOPPING A50 III Headphone Amplifier\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe TOPPING A50 III is the third-generation desktop headphone amplifier that pairs reference-grade transparency with effortless drive. Built around the NFCA (Nested Feedback Composite Amplifier) module, it delivers 3500mW x 2 into 32Ω, a THD+N below 0.00006%, and a 144dB signal-to-noise ratio – enough headroom and clarity to satisfy both sensitive IEMs and power-hungry over-ears. A machined aluminum shell, three-step gain control, and flexible single-ended and balanced connections make the A50 III a complete, future-proof desktop solution.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNFCA Module – Reference-Grade Amplification\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eAt the heart of the A50 III sits the advanced NFCA (Nested Feedback Composite Amplifier) module, the same proven architecture used in its predecessor. The nested feedback topology delivers outstanding DC and AC performance, keeping distortion vanishingly low while driving even low-impedance headphones with complete authority.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e3500mW x 2 – Power for Every Headphone\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe A50 III pushes 3500mW per channel into 32Ω, giving it plenty of current for planars and high-impedance dynamic headphones. Combined with ultra-low distortion, the output stays clean and composed at any volume, preserving the original recording.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTransparent, Measurably Clean\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eTotal harmonic distortion plus noise measures below 0.00006% at 1kHz (A-weighted), with a signal-to-noise ratio and dynamic range of 144dB. The result is a black-quiet background with fast, detailed transients and stable imaging across the whole frequency spectrum.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eThree Gain Steps – Matches Any Source\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA front-panel 3-step gain switch (H\/M\/L) adapts the A50 III to sources from sensitive IEMs to demanding over-ears: -12dB for low-gain listening, 0dB for standard operation, and 11.7dB when extra headroom is needed. Input sensitivity and noise floor are optimized at every step.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFlexible I\/O – 6.35mm, 4.4mm, RCA and TRS\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eConnect via 6.35mm single-ended or 4.4mm balanced headphone outputs, fed by RCA single-ended or TRS balanced inputs. The versatile input\/output matrix lets you swap between sources and headphones without changing cables or adapters.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e12V Trigger – Synchronized Power\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe 12V trigger input lets the A50 III power on and off in sync with your DAC and other gear – pair it with the TOPPING D50 III for a stack that wakes up and sleeps together.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eMachined Aluminum Chassis\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe A50 III is carved from a solid block of aluminum, offering superior electromagnetic shielding plus a smooth, refined finish and exceptional rigidity – a desktop component that feels as precise as it sounds.\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 NFCA (Nested Feedback Composite Amplifier) module\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutput Power:\u003c\/strong\u003e 3500mW x 2 @32Ω (THD+N \u0026lt;0.1%)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTHD+N @1kHz (A-wt):\u003c\/strong\u003e \u0026lt;0.00006%\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTHD @20-20kHz 90kBW:\u003c\/strong\u003e \u0026lt;0.0001%\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSNR @Max Out 1kHz (A-wt):\u003c\/strong\u003e 144dB\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDynamic Range @1kHz (A-wt):\u003c\/strong\u003e 144dB\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFrequency Response:\u003c\/strong\u003e 20Hz-40kHz (±0.1dB) \/ 10Hz-100kHz (±0.5dB)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutput Level:\u003c\/strong\u003e 21Vpp (all gain steps)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAP Measured Noise (A-wt):\u003c\/strong\u003e Low gain \u0026lt;0.7µVrms \/ Medium gain \u0026lt;0.7µVrms \/ High gain \u0026lt;1.1µVrms\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eActual Noise (A-wt):\u003c\/strong\u003e Low gain \u0026lt;0.3µVrms \/ Medium gain \u0026lt;0.3µVrms \/ High gain \u0026lt;1.0µVrms\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInput Sensitivity:\u003c\/strong\u003e Low gain 9.2Vrms \/ Medium gain 8Vrms \/ High gain 1.9Vrms\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGain:\u003c\/strong\u003e Low -12dB \/ Medium 0dB \/ High +11.7dB\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutput Impedance:\u003c\/strong\u003e \u0026lt;0.2Ω\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInput Impedance:\u003c\/strong\u003e 2kΩ (all gain steps)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLoad Impedance:\u003c\/strong\u003e \u0026gt;8Ω\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeadphone Outputs:\u003c\/strong\u003e 6.35mm single-ended + 4.4mm balanced\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInputs:\u003c\/strong\u003e RCA single-ended + TRS balanced\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTrigger:\u003c\/strong\u003e 12V trigger input\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChassis:\u003c\/strong\u003e Machined aluminum unibody (Black \/ Silver)\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 A50 III amplifier\u003c\/li\u003e\n\u003cli\u003e15V DC power adapter\u003c\/li\u003e\n\u003cli\u003e6.35mm to 3.5mm adapter\u003c\/li\u003e\n\u003cli\u003eProduct information card\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0769\/7085\/2544\/files\/topping-a50-iii-headphone-amplifier-hero-banner.jpg?v=1787151138\" alt=\"topping a50 iii headphone amplifier hero banner\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0769\/7085\/2544\/files\/topping-a50-iii-headphone-amplifier-feature-introduction.jpg?v=1787151138\" alt=\"topping a50 iii headphone amplifier feature introduction\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0769\/7085\/2544\/files\/topping-a50-iii-headphone-amplifier-nfca-module.jpg?v=1787151139\" alt=\"topping a50 iii headphone amplifier nfca module\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0769\/7085\/2544\/files\/topping-a50-iii-headphone-amplifier-output-power-3500mw.jpg?v=1787151139\" alt=\"topping a50 iii headphone amplifier output power 3500mw\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0769\/7085\/2544\/files\/topping-a50-iii-headphone-amplifier-low-distortion-thd.jpg?v=1787151139\" alt=\"topping a50 iii headphone amplifier low distortion thd\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0769\/7085\/2544\/files\/topping-a50-iii-headphone-amplifier-snr-dynamic-range.jpg?v=1787151139\" alt=\"topping a50 iii headphone amplifier snr dynamic range\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0769\/7085\/2544\/files\/topping-a50-iii-headphone-amplifier-gain-switch-hml.jpg?v=1787151139\" alt=\"topping a50 iii headphone amplifier gain switch hml\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0769\/7085\/2544\/files\/topping-a50-iii-headphone-amplifier-headphone-outputs-635mm-44mm.jpg?v=1787151139\" alt=\"topping a50 iii headphone amplifier headphone outputs 635mm 44mm\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0769\/7085\/2544\/files\/topping-a50-iii-headphone-amplifier-inputs-rca-trs.jpg?v=1787151138\" alt=\"topping a50 iii headphone amplifier inputs rca trs\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0769\/7085\/2544\/files\/topping-a50-iii-headphone-amplifier-12v-trigger.jpg?v=1787151138\" alt=\"topping a50 iii headphone amplifier 12v trigger\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0769\/7085\/2544\/files\/topping-a50-iii-headphone-amplifier-cnc-aluminum-shell.jpg?v=1787151138\" alt=\"topping a50 iii headphone amplifier cnc aluminum shell\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0769\/7085\/2544\/files\/topping-a50-iii-headphone-amplifier-headphone-compatibility.jpg?v=1787151138\" alt=\"topping a50 iii headphone amplifier headphone compatibility\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0769\/7085\/2544\/files\/topping-a50-iii-headphone-amplifier-measurements.jpg?v=1787151138\" alt=\"topping a50 iii headphone amplifier measurements\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0769\/7085\/2544\/files\/topping-a50-iii-headphone-amplifier-technical-specifications.jpg?v=1787151139\" alt=\"topping a50 iii headphone amplifier technical specifications\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0769\/7085\/2544\/files\/topping-a50-iii-headphone-amplifier-dimensions.jpg?v=1787151139\" alt=\"topping a50 iii headphone amplifier dimensions\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0769\/7085\/2544\/files\/topping-a50-iii-headphone-amplifier-in-the-box.jpg?v=1787151138\" alt=\"topping a50 iii headphone amplifier in the box\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0769\/7085\/2544\/files\/topping-a50-iii-headphone-amplifier-desk-setup.jpg?v=1787151139\" alt=\"topping a50 iii headphone amplifier desk setup\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0769\/7085\/2544\/files\/topping-a50-iii-headphone-amplifier-detail-view.jpg?v=1787151139\" alt=\"topping a50 iii headphone amplifier detail view\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0769\/7085\/2544\/files\/topping-a50-iii-headphone-amplifier-feature-detail.jpg?v=1787151139\" alt=\"topping a50 iii headphone amplifier feature detail\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0769\/7085\/2544\/files\/topping-a50-iii-headphone-amplifier-performance-chart.jpg?v=1787151138\" alt=\"topping a50 iii headphone amplifier performance chart\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0769\/7085\/2544\/files\/topping-a50-iii-headphone-amplifier-closeup.jpg?v=1787151138\" alt=\"topping a50 iii headphone amplifier closeup\"\u003e\u003c\/p\u003e","brand":"TOPPING","offers":[{"title":"Black","offer_id":48847020753088,"sku":"10012989","price":1591.48,"currency_code":"HKD","in_stock":true},{"title":"Silver","offer_id":48847021080768,"sku":"10018235","price":1591.48,"currency_code":"HKD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0769\/7085\/2544\/files\/topping-a50-iii-headphone-amplifier-black-front-view.jpg?v=1787151156","url":"https:\/\/hifichic.com\/products\/topping-a50-iii-headphone-amplifier","provider":"HIFICHIC","version":"1.0","type":"link"}