{"product_id":"adcom-gfa-555ms-stereo-power-amplifier","title":"Adcom GFA-555ms Stereo Power Amplifier","description":"\u003cdiv class=\"elementor-element elementor-element-8c1c7bf elementor-widget elementor-widget-woocommerce-product-title elementor-page-title elementor-widget-heading\" data-id=\"8c1c7bf\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"woocommerce-product-title.default\"\u003e\n\u003cdiv class=\"elementor-widget-container\"\u003e\n\u003ch1 class=\"product_title entry-title elementor-heading-title elementor-size-default\"\u003eAdcom GFA-555ms Power Amplifier\u003c\/h1\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"elementor-element elementor-element-1a133254 elementor-widget elementor-widget-heading\" data-id=\"1a133254\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\"\u003e\n\u003cdiv class=\"elementor-widget-container\"\u003e\u003cspan class=\"elementor-heading-title elementor-size-medium\"\u003eFor those who desire the power finesse in a two-channel amplifier, look no further than GFA-555ms. The GFA-555ms amplifier can drive a very broad range of loudspeakers, including those with very low impedances, at sustained high-power levels, even when the impedances are highly reactive.\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv class=\"elementor-widget-container\"\u003e\u003cspan class=\"elementor-heading-title elementor-size-medium\"\u003e\u003cimg src=\"https:\/\/adcom.com\/wp-content\/uploads\/gfa-555ms-slide1.jpg\"\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv class=\"elementor-widget-container\"\u003e\n\u003cdiv class=\"elementor-element elementor-element-4d707bdd elementor-widget elementor-widget-heading\" data-id=\"4d707bdd\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\"\u003e\n\u003cdiv class=\"elementor-widget-container\"\u003e\n\u003ch2 class=\"elementor-heading-title elementor-size-xl\"\u003eDynamic Sound\u003c\/h2\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"elementor-element elementor-element-6489b0f2 elementor-widget elementor-widget-text-editor\" data-id=\"6489b0f2\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\"\u003e\n\u003cdiv class=\"elementor-widget-container\"\u003eGFA-555ms runs on 200 W into 4 ohms, takes both Unbalanced and Balanced inputs and drives your speakers with 40+40 Watts of high performance, ultra low distortion power output all from a neat package. We have engineered an uncompromised circuit design that delivers ultra-low distortion and a crisp dynamic sound. It all adds up to a startlingly vivid and highly impactful musical performance that will put more energy into your loudspeakers as well as control them like never before.\u003c\/div\u003e\n\u003cdiv class=\"elementor-widget-container\"\u003e\u003cimg src=\"https:\/\/adcom.com\/wp-content\/uploads\/gfa-555ms-slide2.jpg\"\u003e\u003c\/div\u003e\n\u003cdiv class=\"elementor-widget-container\"\u003e\n\u003cdiv class=\"elementor-element elementor-element-63bb8786 elementor-widget elementor-widget-heading\" data-id=\"63bb8786\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\"\u003e\n\u003cdiv class=\"elementor-widget-container\"\u003e\n\u003ch2 class=\"elementor-heading-title elementor-size-xl\"\u003eLow Distortion\u003c\/h2\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"elementor-element elementor-element-31eadb2f elementor-widget elementor-widget-text-editor\" data-id=\"31eadb2f\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\"\u003e\n\u003cdiv class=\"elementor-widget-container\"\u003eGreat care was taken to insure that distortion in the amplifier would remain extremely low, particularly when driving these highly reactive loads in which the phase angles of the voltageand the current are substantially different.\u003c\/div\u003e\n\u003cdiv class=\"elementor-widget-container\"\u003e\u003cimg src=\"https:\/\/adcom.com\/wp-content\/uploads\/gfa-555ms-slide7.jpg\"\u003e\u003c\/div\u003e\n\u003cdiv class=\"elementor-widget-container\"\u003e\n\u003ch2\u003eAdcom GFA-555ms Stereo Power Amplifier\u003c\/h2\u003e\n\u003cp\u003eThe\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eAdcom GFA-555ms\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003ebuilds on one of audio's most respected amplifier legacies, reimagined for greater control, lower noise, and a more revealing presentation. Designed for those who demand both authority and finesse, it delivers\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003ehigh-current performance\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003ewith the kind of composure that lets your system breathe effortlessly.\u003c\/p\u003e\n\u003cp\u003eWith\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e200 watts per channel into 8 ohms\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eand\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e325 watts into 4 ohms\u003c\/strong\u003e, the GFA-555ms offers substantial headroom, driving even the most demanding speakers with ease. Its updated circuitry improves resolution and transparency, allowing finer details, deeper textures, and a more expansive soundstage to emerge.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/adcom.com\/wp-content\/uploads\/gfa-555ms-slide8.jpg\"\u003e\u003c\/p\u003e\n\u003cp\u003eWhat defines the GFA-555ms is its balance. Bass is powerful yet controlled, the midrange is open and dimensional, and the highs extend cleanly without harshness. Whether you're listening at low levels or pushing the system hard, it maintains a sense of grip and clarity that keeps everything in focus.\u003c\/p\u003e\n\u003cp\u003eBuilt with a robust power supply and Adcom's signature no-nonsense engineering, the GFA-555ms is as reliable as it is capable — equally at home in a dedicated stereo system or a high-performance home theatre.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/adcom.com\/wp-content\/uploads\/gfa-555ms-slide12.jpg\"\u003e\u003c\/p\u003e\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e200W per channel (8 ohms) \/ 325W per channel (4 ohms)\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e— massive headroom for any speaker\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBridgeable to 400W mono (8 ohms)\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e— for high-power single-zone or subwoofer duty\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-current design\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003efor demanding, low-impedance speaker loads\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eImproved circuitry\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003efor greater transparency, resolution, and detail retrieval\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWide dynamic range\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003ewith excellent grip and headroom at all listening levels\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDual voltage compatible\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e— 120VAC \u0026amp; 230VAC \/ 50–60Hz for worldwide use\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLegendary Adcom reliability\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003ewith classic, no-nonsense build quality\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable border=\"1\" cellpadding=\"8\" cellspacing=\"0\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOutput Power – 8 Ohms (Stereo)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e125W per channel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOutput Power – 4 Ohms (Stereo)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e200W per channel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBridged Mono Power – 8 Ohms\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e400W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFrequency Response\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e10Hz – 20kHz, +0 \/ −0.25dB (1W into 8 ohms)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePower Bandwidth (−3dB)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e10Hz – 100kHz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInput Impedance\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e100,000 ohms\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInput Sensitivity\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1.38V rms (125W into 8 ohms) \/ 123mV rms (1W into 8 ohms)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDamping Factor\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u0026gt;400 (20Hz – 20kHz)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePower\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e120VAC \u0026amp; 230VAC \/ 50–60Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMaximum Dimensions (H × W × D)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e6\" × 17\" × 12.5\" (152 × 432 × 318 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWeight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e28.6 lbs. (13 kg)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eShipping Weight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e33 lbs. (15 kg)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e* For complete technical documentation, please refer to the official Adcom GFA-555ms user manual included with the unit or available upon request.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Adcom","offers":[{"title":"Default Title","offer_id":48918898704636,"sku":"GFA-555ms","price":2160.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0116\/1773\/0617\/files\/AdcomGFA-555msStereoPowerAmplifier.png?v=1775233725","url":"https:\/\/vinylsound.ca\/products\/adcom-gfa-555ms-stereo-power-amplifier","provider":"Vinyl Sound Canada Inc.","version":"1.0","type":"link"}