{"id":46608,"date":"2026-10-03T07:03:09","date_gmt":"2026-10-03T10:03:09","guid":{"rendered":"https:\/\/hificlub.com.br\/loja\/?post_type=product&#038;p=46608"},"modified":"2026-10-03T07:07:55","modified_gmt":"2026-10-03T10:07:55","slug":"accuphase-a-70-amplificador-stereo-mosfet-pure-class-a-60-watts","status":"publish","type":"product","link":"https:\/\/hificlub.com.br\/loja\/produto\/accuphase-a-70-amplificador-stereo-mosfet-pure-class-a-60-watts\/","title":{"rendered":"ACCUPHASE A-70  Amplificador Stereo Mosfet Pure Class A  60 watts"},"content":{"rendered":"<p><span dir=\"auto\">Herdando muitas das caracter\u00edsticas tecnol\u00f3gicas excepcionais do A-200, o A-70 representa uma mudan\u00e7a completa em rela\u00e7\u00e3o ao A-65, pronto para assumir o posto de amplificador de pot\u00eancia est\u00e9reo Classe A definitivo. Refletindo essa tradi\u00e7\u00e3o, o A-70 tamb\u00e9m implementa tecnologias de ponta, como o princ\u00edpio do amplificador de instrumenta\u00e7\u00e3o de baix\u00edssimo ru\u00eddo, implementado em uma configura\u00e7\u00e3o discreta, juntamente com est\u00e1gios otimizados de entrada de sinal e amplifica\u00e7\u00e3o de pot\u00eancia. O resultado \u00e9 uma impressionante rela\u00e7\u00e3o sinal\/ru\u00eddo de 127 dB (com ganho de -12 dB), superando at\u00e9 mesmo a formid\u00e1vel linha de amplificadores est\u00e9reo Accuphase anteriores.<\/span><br \/>\n<span dir=\"auto\">O est\u00e1gio de sa\u00edda do A-70 apresenta MOSFETs de pot\u00eancia renomados por sua excelente resposta de frequ\u00eancia, desempenho sonoro e confiabilidade superior. No circuito de sa\u00edda, bobinas de bitola ultragrossa com uma \u00e1rea de superf\u00edcie mais de tr\u00eas vezes maior que as unidades convencionais, combinadas com chaves MOSFET, s\u00e3o usadas no lugar de rel\u00e9s, eliminando contatos mec\u00e2nicos e melhorando a confiabilidade a longo prazo. Materiais de alta qualidade, tecnologia sofisticada de circuitos e diversas outras medidas resultam em baixa imped\u00e2ncia e permitem alcan\u00e7ar um fator de amortecimento de 800, o que representa uma melhoria de duas vezes em rela\u00e7\u00e3o ao A-65.<\/span><\/p>\n<ul>\n<li><span dir=\"auto\">O funcionamento em Classe A pura proporciona pot\u00eancia de qualidade: 60 watts x 2 em 8 ohms.<\/span><\/li>\n<li><span dir=\"auto\">O est\u00e1gio de sa\u00edda Power MOSFET apresenta uma configura\u00e7\u00e3o push-pull de 10 transistores em paralelo e oferece progress\u00e3o linear de alta pot\u00eancia para imped\u00e2ncias ultrabaixas de 1 ohm.<\/span><\/li>\n<li><span dir=\"auto\">Princ\u00edpio de amplificador de instrumenta\u00e7\u00e3o de ru\u00eddo ultrabaixo usado no est\u00e1gio de entrada<\/span><\/li>\n<li><span dir=\"auto\">O est\u00e1gio de amplifica\u00e7\u00e3o implementa uma topologia MCS+ ainda mais evolu\u00edda.<\/span><\/li>\n<li><span dir=\"auto\">O princ\u00edpio de feedback de corrente combina opera\u00e7\u00e3o est\u00e1vel com qualidade de som excepcional.<\/span><\/li>\n<li><span dir=\"auto\">O modo de conex\u00e3o em ponte permite a atualiza\u00e7\u00e3o para um amplificador monof\u00f4nico.<\/span><\/li>\n<li><span dir=\"auto\">Dois tipos de medidores selecion\u00e1veis: medidores de energia digitais que exibem os valores reais de pot\u00eancia e indicadores de gr\u00e1fico de barras.<\/span><\/li>\n<\/ul>\n<div class=\"\" data-bfc=\"\" data-sfc-cp=\"\" data-sfc-root=\"ep\" data-ved=\"2ahUKEwiVr9iqy52XAxW3rJUCHVF9GiMQi4wTegoIAggACAAIHhAA\" data-hveid=\"CAIIAAgACB4QAA\">\n<h3 class=\"otQkpb\" role=\"heading\" data-wiz-attrbind=\"aria-level=TyRKv_3f\/fLk2Md\" data-sfc-root=\"ep\">Desempenho Sonoro (Resumo de Cr\u00edticos)<!--TgQPHd|||[]--><\/h3>\n<p><!--TgQPHd|||[]--><\/p>\n<\/div>\n<div class=\"\" data-bfc=\"\" data-sfc-cp=\"\" data-sfc-root=\"ep\" data-ved=\"2ahUKEwiVr9iqy52XAxW3rJUCHVF9GiMQi4wTegoIAggACAAIIBAB\" data-hveid=\"CAIIAAgACCAQAQ\">\n<ul>\n<li class=\"Z1qcYe\" data-sfc-cp=\"\" data-sfc-root=\"ep\" data-hveid=\"CAIIAAgACCAQAg\"><span class=\"iNqyIf\" data-sfc-cp=\"\" data-sfc-root=\"ep\"><strong class=\"rQesXe MPyX\" data-sfc-cp=\"\" data-sfc-root=\"ep\"><span class=\"yADgie\">Sonoridade:<\/span><!--TgQPHd|||[]--><\/strong><span class=\"yADgie\"> Avaliado por especialistas (como no site <\/span><span class=\"\" data-sfc-cp=\"\" data-sfc-root=\"ep\"><a class=\"H23r4e\" href=\"https:\/\/www.google.com\/goto?url=CAESYQHrOzAVHW1jLNwqlQNSRijQdjjIdtWV9vBXgF0KtcbsbAMqoh6BXI0NYQ_PSjZFtp6MGzy9keBMb_H3aSN4QhepgE8fryyhBXnHrdI2mQaJMDxXwgGmwndsJpVKtCdKfQA\" target=\"_blank\" rel=\"noopener\" data-ved=\"2ahUKEwiVr9iqy52XAxW3rJUCHVF9GiMQy_kOegoIAggACAAIIBAD\" data-hveid=\"CAIIAAgACCAQAw\"><em class=\"zhvwWe\" data-sfc-cp=\"\" data-sfc-root=\"ep\"><span class=\"yADgie\">High Fidelity<\/span><!--TgQPHd|||[]--><\/em><\/a><!--TgQPHd|||[[&quot;https:\/\/highfidelity.pl\/@main-559\\u0026lang\\u003den&quot;,null,null,[null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,[{&quot;1218&quot;:[16,null,null,null,[1]]}]],16,null,&quot;High Fidelity&quot;,&quot;Manufacturer: ACCUPHASE LABORATORY, Inc., Japan (Price: 74900 PLN, Delivered by: Nautilus). Model: A-70 Power Amplifier (Class A stereophonic version of A-200 monoblocks, made in Japan). Design: Discrete ultra-low-noise instrumentation amplifier input stage, push-pull configuration with 10 pairs of MOS-FET output transistors per channel, MCS+ principle, edgewise coils and MOS-FET switches replacing mechanical relays. Specifications: Continuous output power 60W\/8\u03a9, 120W\/4\u03a9, 240W\/2\u03a9, 480W\/1\u03a9; S\/N ratio -121 dB guaranteed; Damping factor 800 guaranteed; Dimensions 465x238x514 mm; Weight 44.3 kg. Features: Golden anodized aluminum front, power\/level indicators, Eco Mode auto-off function.&quot;,&quot;https:\/\/encrypted-tbn1.gstatic.com\/images?q\\u003dtbn:ANd9GcThp2wbP2bTIFSTBxg5G5run1xl3XfOdmSbRHaW8dtRd4dRyi0A_SBurmq0Xc1MZZwhEu6GVfFmlGMis8g&quot;,&quot;HighFidelity.pl&quot;,&quot;https:\/\/encrypted-tbn2.gstatic.com\/faviconV2?url\\u003dhttps:\/\/highfidelity.pl\\u0026client\\u003dAIM\\u0026size\\u003d128\\u0026type\\u003dFAVICON\\u0026fallback_opts\\u003dTYPE,SIZE,URL&quot;,[[1791021584619413,43363511,588938577],null,null,null,null,[[2,0,0,31]]],null,&quot;6b11565c-4870-49c9-baf7-e3d1c610b40b&quot;]]--><\/span><span class=\"yADgie\">) como um amplificador de som org\u00e2nico, extremamente detalhado, rico e com aquecimento t\u00e9rmico necess\u00e1rio (cerca de 4 horas para atingir performance ideal).<\/span><!--TgQPHd|||[]--><\/span><!--TgQPHd|||[]--><\/li>\n<\/ul>\n<p><!--TgQPHd|||[]--><\/p>\n<\/div>\n<div class=\"\" data-bfc=\"\" data-sfc-cp=\"\" data-sfc-root=\"ep\" data-ved=\"2ahUKEwiVr9iqy52XAxW3rJUCHVF9GiMQi4wTegoIAggACAAIIBAE\" data-hveid=\"CAIIAAgACCAQBA\">\n<ul>\n<li class=\"Z1qcYe\" data-sfc-cp=\"\" data-sfc-root=\"ep\" data-hveid=\"CAIIAAgACCAQBQ\"><span class=\"iNqyIf\" data-sfc-cp=\"\" data-sfc-root=\"ep\"><strong class=\"rQesXe MPyX\" data-sfc-cp=\"\" data-sfc-root=\"ep\"><span class=\"yADgie\">Controle de Graves:<\/span><!--TgQPHd|||[]--><\/strong><span class=\"yADgie\"> Oferece excelente autoridade e precis\u00e3o nas baixas frequ\u00eancias, superando o modelo anterior A-65.<\/span><!--TgQPHd|||[]--><\/span><!--TgQPHd|||[]--><\/li>\n<\/ul>\n<p><!--TgQPHd|||[]--><\/p>\n<\/div>\n<div class=\"\" data-bfc=\"\" data-sfc-cp=\"\" data-sfc-root=\"ep\" data-ved=\"2ahUKEwiVr9iqy52XAxW3rJUCHVF9GiMQi4wTegoIAggACAAIIBAG\" data-hveid=\"CAIIAAgACCAQBg\">\n<ul>\n<li class=\"Z1qcYe\" data-sfc-cp=\"\" data-sfc-root=\"ep\" data-hveid=\"CAIIAAgACCAQBw\"><span class=\"iNqyIf\" data-sfc-cp=\"\" data-sfc-root=\"ep\"><strong class=\"rQesXe MPyX\" data-sfc-cp=\"\" data-sfc-root=\"ep\"><span class=\"yADgie\">Emparelhamento:<\/span><!--TgQPHd|||[]--><\/strong><span class=\"yADgie\"> Lida muito bem com caixas ac\u00fasticas exigentes, embora seja ideal para audi\u00e7\u00e3o moderada a volumes realistas devido \u00e0 sua natureza estritamente Classe A.<\/span><!--TgQPHd|||[]--><\/span><\/li>\n<\/ul>\n<\/div>\n<h3><span dir=\"auto\">Especifica\u00e7\u00f5es<\/span><\/h3>\n<p><span dir=\"auto\">Pot\u00eancia de sa\u00edda: 60 watts por canal em 8\u03a9 (est\u00e9reo), 240 watts em 8\u03a9 (mono)<\/span><\/p>\n<p><span class=\"iNqyIf\" data-sfc-cp=\"\" data-sfc-root=\"ep\"><span class=\"yADgie\">Configura\u00e7\u00e3o de Sa\u00edda:<\/span><!--TgQPHd|||[]--><span class=\"yADgie\"> 10 pares em paralelo de transistores MOS-FET de pot\u00eancia por canal.<\/span><\/span><\/p>\n<p><span dir=\"auto\">Resposta de frequ\u00eancia: 20 Hz a 20 kHz<\/span><\/p>\n<p><span dir=\"auto\">Distor\u00e7\u00e3o harm\u00f4nica total: 0,03%<\/span><\/p>\n<p><span dir=\"auto\">Fator de amortecimento: 800<\/span><\/p>\n<p><span dir=\"auto\">Ganho: 28 dB<\/span><\/p>\n<p><span dir=\"auto\">Sensibilidade de entrada: 0,87V<\/span><\/p>\n<p><span dir=\"auto\">Rela\u00e7\u00e3o sinal-ru\u00eddo: 121dB<\/span><\/p>\n<p><span dir=\"auto\">Imped\u00e2ncia de carga do alto-falante: 2\u03a9 a 16\u03a9<\/span><\/p>\n<p><span dir=\"auto\">Dimens\u00f5es: 465 x 238 x 515 mm<\/span><\/p>\n<p><span dir=\"auto\">Peso: 44,3 kg<\/span><\/p>\n<p><span dir=\"auto\">Ano: 2015<\/span><\/p>\n<div class=\"rabbit-hole\"><\/div>\n","protected":false},"excerpt":{"rendered":"<p>Herdando muitas das caracter\u00edsticas tecnol\u00f3gicas excepcionais do A-200, o A-70 representa uma mudan\u00e7a completa em rela\u00e7\u00e3o ao A-65, pronto para assumir o posto de amplificador de pot\u00eancia est\u00e9reo Classe A definitivo. Refletindo essa tradi\u00e7\u00e3o, o A-70 tamb\u00e9m implementa tecnologias de ponta, como o princ\u00edpio do amplificador de instrumenta\u00e7\u00e3o de baix\u00edssimo ru\u00eddo, implementado em uma configura\u00e7\u00e3o [&hellip;]<\/p>\n","protected":false},"featured_media":46609,"template":"","meta":{"_acf_changed":false,"_members_access_role":[],"_members_access_error":""},"product_brand":[],"product_cat":[229,27,28],"product_tag":[],"class_list":["post-46608","product","type-product","status-publish","has-post-thumbnail","product_cat-accuphase","product_cat-amplificador","product_cat-estereo","first","instock","sold-individually","shipping-taxable","purchasable","product-type-simple"],"acf":[],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.3 - aioseo.com -->\n\t<meta name=\"description\" content=\"Automa\u00e7\u00e3o . \u00c1udio . 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