{"product_id":"soulnote-a-3-core-stereo-power-amplifier","title":"Soulnote A-3 Core Stereo Power Amplifier","description":"\u003ch2\u003eThe Flagship's Beating Heart: Soulnote A-3 Core\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eSoulnote A-3 Core\u003c\/strong\u003e distils the power section of Soulnote's flagship thinking into a pure stereo power amplifier — 120 watts per channel of completely non-NFB, GND-separated muscle, built by ex-Marantz engineer Norinaga Nakazawa's team and voiced \"100% based on the actual sense of hearing.\" It is engineering as obsession: every choice, from grounding to heatsink to suspension, made in the service of blur-free, three-dimensional sound.\u003c\/p\u003e\n\u003ch2\u003eGND Separation and a Copper Backbone\u003c\/h2\u003e\n\u003cp\u003eIts headline technology is complete separation of the left and right channel grounds — achieved through non-NFB circuits and meticulous layout — which unlocks a startlingly wide, stable soundstage. A single push-pull SEPP output stage using TO3 bipolar transistors keeps the signal path short and honest, while a newly developed Type-R circuit uses ultra-high-quality naked foil resistors for high, clean single-stage gain. A massive copper bus-bar heatsink does triple duty as heat sink, power distribution and structural spine.\u003c\/p\u003e\n\u003ch2\u003eTwo Transformers, No Compromise\u003c\/h2\u003e\n\u003cp\u003eDual 700 VA unimpregnated toroidal transformers with fast SiC rectifier diodes feed a high-speed non-NFB power supply, and the entire amplifier block floats on a three-point titanium slider suspension to keep vibration out of the music. At 29 kg, the A-3 Core is a serious amplifier for anyone building around a top-tier preamp or DAC-preamp.\u003c\/p\u003e\n\u003ch2\u003eWhy You'll Love the Soulnote A-3 Core\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e120 W + 120 W (4 ohms)\u003c\/strong\u003e — completely non-NFB stereo power\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFull L\/R GND separation\u003c\/strong\u003e — a wide, rock-stable soundstage\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSingle push-pull SEPP, TO3 bipolar\u003c\/strong\u003e — short signal path, blur-free delivery\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDual 700 VA toroidals + SiC diodes\u003c\/strong\u003e — high-speed, high-current supply\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCopper bus-bar heatsink\u003c\/strong\u003e — heat, power and structure in one\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTitanium slider suspension\u003c\/strong\u003e — vibration kept away from the music\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHand-built in Japan\u003c\/strong\u003e — Premium Silver or Premium Black, 29 kg\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003ch3\u003eIs the A-3 Core an integrated amplifier?\u003c\/h3\u003e\n\u003cp\u003eNo — it's a dedicated stereo power amplifier. It takes line-level input from a preamplifier or a DAC\/streamer with volume control (such as the Soulnote D-3) and drives your loudspeakers directly.\u003c\/p\u003e\n\u003ch3\u003eWhat is GND separation and why does it matter?\u003c\/h3\u003e\n\u003cp\u003eBy keeping the left and right channels' grounds completely separate, the A-3 Core prevents cross-channel interference, which sharpens imaging and widens the soundstage — a core part of the Soulnote sound.\u003c\/p\u003e\n\u003ch3\u003eWhat preamplifier or source pairs with it?\u003c\/h3\u003e\n\u003cp\u003eAny high-quality preamplifier, or a DAC-preamp like the Soulnote D-3 that can output a controlled line-level signal.\u003c\/p\u003e\n\u003ch2\u003eSoulnote A-3 Core Technical Specifications\u003c\/h2\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eType\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eStereo power amplifier, completely non-NFB, GND-separated\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePower output\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e120 W + 120 W (4 ohms)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOutput stage\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eSingle push-pull SEPP, TO3 bipolar transistors\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTHD\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e0.27% (1 W, 8 ohms)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFrequency response\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e2 Hz – 200 kHz (±3 dB)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInput sensitivity \/ impedance\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e480 mV \/ 24 kΩ\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePower supply\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eDual 700 VA unimpregnated toroidal transformers, SiC diodes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eIsolation\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eThree-point titanium slider suspension\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDimensions (W × H × D)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e454 × 189 × 435 mm (with spikes)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWeight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e29 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFinishes\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003ePremium Silver or Premium Black\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMade in\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eJapan — Soulnote\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e","brand":"Soulnote","offers":[{"title":"Premium Black","offer_id":47712402800817,"sku":"SNA3COREBL","price":25000.0,"currency_code":"CAD","in_stock":true},{"title":"Premium Silver","offer_id":47712402768049,"sku":"SNA3CORESL","price":25000.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0245\/7723\/files\/a-3core_black_front.jpg?v=1784181461","url":"https:\/\/audionation.ca\/products\/soulnote-a-3-core-stereo-power-amplifier","provider":"Audionation","version":"1.0","type":"link"}