{"id":18987,"date":"2025-07-14T16:14:37","date_gmt":"2025-07-14T09:14:37","guid":{"rendered":"https:\/\/trungvu.net\/?p=18987"},"modified":"2025-07-14T16:14:41","modified_gmt":"2025-07-14T09:14:41","slug":"mach-chia-rca-stereo-1-vao-8-ra-dung-ic-4558-giai-phap-toi-uu-cho-he-thong-am-thanh-da-thiet-bi","status":"publish","type":"post","link":"https:\/\/trungvu.net\/wordpress\/mach-chia-rca-stereo-1-vao-8-ra-dung-ic-4558-giai-phap-toi-uu-cho-he-thong-am-thanh-da-thiet-bi\/","title":{"rendered":"M\u1ea1ch chia RCA Stereo 1 v\u00e0o 8 ra d\u00f9ng IC 4558 \u2013 Gi\u1ea3i ph\u00e1p t\u1ed1i \u01b0u cho h\u1ec7 th\u1ed1ng \u00e2m thanh \u0111a thi\u1ebft b\u1ecb"},"content":{"rendered":"\n<p>Trong h\u1ec7 th\u1ed1ng \u00e2m thanh hi\u1ec7n \u0111\u1ea1i, vi\u1ec7c chia t\u00edn hi\u1ec7u t\u1eeb m\u1ed9t ngu\u1ed3n ph\u00e1t duy nh\u1ea5t \u0111\u1ebfn nhi\u1ec1u thi\u1ebft b\u1ecb \u0111\u1ea7u ra m\u00e0 v\u1eabn \u0111\u1ea3m b\u1ea3o ch\u1ea5t l\u01b0\u1ee3ng l\u00e0 r\u1ea5t quan tr\u1ecdng. M\u1ea1ch chia RCA stereo 1 v\u00e0o 8 ra s\u1eed d\u1ee5ng IC 4558 l\u00e0 m\u1ed9t gi\u1ea3i ph\u00e1p hi\u1ec7u qu\u1ea3, \u0111\u01a1n gi\u1ea3n v\u00e0 ti\u1ebft ki\u1ec7m \u2013 ph\u00f9 h\u1ee3p cho c\u00e1c \u1ee9ng d\u1ee5ng nh\u01b0 d\u00e0n karaoke, h\u1ec7 th\u1ed1ng \u00e2m thanh h\u1ed9i tr\u01b0\u1eddng, ho\u1eb7c ph\u00f2ng thu t\u1ea1i gia.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"1024\" src=\"https:\/\/trungvu.net\/wp-content\/uploads\/2025\/07\/C7124D26-1C4C-4F0D-A35E-37C5905D4FB9.png\" alt=\"M\u1ea1ch chia RCA Stereo 1 v\u00e0o 8 ra d\u00f9ng IC 4558 \u2013 Gi\u1ea3i ph\u00e1p t\u1ed1i \u01b0u cho h\u1ec7 th\u1ed1ng \u00e2m thanh \u0111a thi\u1ebft b\u1ecb\" class=\"wp-image-18988\" srcset=\"https:\/\/trungvu.net\/wordpress\/wp-content\/uploads\/2025\/07\/C7124D26-1C4C-4F0D-A35E-37C5905D4FB9.png 1024w, https:\/\/trungvu.net\/wordpress\/wp-content\/uploads\/2025\/07\/C7124D26-1C4C-4F0D-A35E-37C5905D4FB9-300x300.png 300w, https:\/\/trungvu.net\/wordpress\/wp-content\/uploads\/2025\/07\/C7124D26-1C4C-4F0D-A35E-37C5905D4FB9-105x105.png 105w, https:\/\/trungvu.net\/wordpress\/wp-content\/uploads\/2025\/07\/C7124D26-1C4C-4F0D-A35E-37C5905D4FB9-768x768.png 768w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><figcaption class=\"wp-element-caption\"><em>M\u1ea1ch chia RCA Stereo 1 v\u00e0o 8 ra d\u00f9ng IC 4558 \u2013 Gi\u1ea3i ph\u00e1p t\u1ed1i \u01b0u cho h\u1ec7 th\u1ed1ng \u00e2m thanh \u0111a thi\u1ebft b\u1ecb<\/em><\/figcaption><\/figure>\n\n\n\n<p><strong>\u2705 M\u1ea1ch chia RCA l\u00e0 g\u00ec?<\/strong><\/p>\n\n\n\n<p>M\u1ea1ch chia RCA l\u00e0 thi\u1ebft b\u1ecb gi\u00fap ph\u00e2n chia t\u00edn hi\u1ec7u \u00e2m thanh t\u1eeb m\u1ed9t ngu\u1ed3n RCA (g\u1ed3m 2 k\u00eanh: Left &amp; Right) sang nhi\u1ec1u thi\u1ebft b\u1ecb \u0111\u1ea7u ra kh\u00e1c nhau nh\u01b0 ampli, loa, mixer, thi\u1ebft b\u1ecb ghi \u00e2m\u2026<\/p>\n\n\n\n<p>N\u1ebfu ch\u1ec9 chia d\u00e2y (th\u1ee5 \u0111\u1ed9ng), t\u00edn hi\u1ec7u d\u1ec5 b\u1ecb suy gi\u1ea3m, m\u00e9o ho\u1eb7c nhi\u1ec5u. Do \u0111\u00f3, gi\u1ea3i ph\u00e1p t\u1ed1t nh\u1ea5t l\u00e0 s\u1eed d\u1ee5ng m\u1ea1ch chia ch\u1ee7 \u0111\u1ed9ng (active splitter) v\u1edbi IC khu\u1ebfch \u0111\u1ea1i.<\/p>\n\n\n\n<p><strong>\ud83d\udd0d T\u1ea1i sao n\u00ean ch\u1ecdn IC 4558?<\/strong><\/p>\n\n\n\n<p>IC 4558 l\u00e0 op-amp k\u00e9p (dual operational amplifier), gi\u00e1 r\u1ebb, d\u1ec5 ki\u1ebfm, ph\u00f9 h\u1ee3p cho c\u00e1c m\u1ea1ch \u00e2m thanh c\u01a1 b\u1ea3n. D\u00f9 kh\u00f4ng cao c\u1ea5p nh\u01b0 TL072, nh\u01b0ng 4558 v\u1eabn \u0111\u1ea3m b\u1ea3o:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Ho\u1ea1t \u0111\u1ed9ng \u1ed5n \u0111\u1ecbnh trong d\u1ea3i t\u1ea7n s\u1ed1 \u00e2m thanh.<\/li>\n\n\n\n<li>T\u00edn hi\u1ec7u s\u1ea1ch, \u00edt m\u00e9o.<\/li>\n\n\n\n<li>D\u1ec5 thi c\u00f4ng, th\u00edch h\u1ee3p cho d\u00e2n DIY.<\/li>\n<\/ul>\n\n\n\n<p><strong>\ud83e\uddf0 C\u00e1ch ho\u1ea1t \u0111\u1ed9ng c\u1ee7a m\u1ea1ch chia RCA stereo 1 v\u00e0o 8 ra<\/strong><\/p>\n\n\n\n<p><strong>\ud83d\udee0 C\u1ea5u tr\u00fac t\u00edn hi\u1ec7u:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>1 \u0111\u1ea7u v\u00e0o RCA stereo = 2 t\u00edn hi\u1ec7u (L + R)<\/li>\n\n\n\n<li>M\u1ed7i t\u00edn hi\u1ec7u \u0111\u01b0\u1ee3c chia th\u00e0nh 8 k\u00eanh ri\u00eang bi\u1ec7t<\/li>\n\n\n\n<li>T\u1ed5ng c\u1ed9ng: 16 op-amp (8 cho L, 8 cho R) \u2192 c\u1ea7n 8 IC 4558<\/li>\n<\/ul>\n\n\n\n<p><strong>\ud83d\udd04 M\u1ed7i k\u00eanh \u0111\u01b0\u1ee3c khu\u1ebfch \u0111\u1ea1i \u0111\u1ed9c l\u1eadp qua op-amp \u1edf ch\u1ebf \u0111\u1ed9&nbsp;<\/strong><\/p>\n\n\n\n<p><strong>buffer (voltage follower)<\/strong><\/p>\n\n\n\n<p><strong>:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Kh\u00f4ng l\u00e0m m\u00e9o ti\u1ebfng<\/li>\n\n\n\n<li>Gi\u1eef t\u00edn hi\u1ec7u m\u1ea1nh, \u1ed5n \u0111\u1ecbnh, tr\u1edf kh\u00e1ng ra th\u1ea5p<\/li>\n\n\n\n<li>Kh\u00f4ng \u1ea3nh h\u01b0\u1edfng l\u1eabn nhau<\/li>\n<\/ul>\n\n\n\n<p><strong>\ud83d\udccb Danh s\u00e1ch linh ki\u1ec7n<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td><strong>STT<\/strong><\/td><td><strong>T\u00ean linh ki\u1ec7n<\/strong><\/td><td><strong>S\u1ed1 l\u01b0\u1ee3ng<\/strong><\/td><td><strong>Ghi ch\u00fa<\/strong><\/td><\/tr><tr><td>1<\/td><td>IC 4558<\/td><td>8<\/td><td>M\u1ed7i IC c\u00f3 2 op-amp<\/td><\/tr><tr><td>2<\/td><td>T\u1ee5 \u0111i\u1ec7n 1uF NP<\/td><td>2<\/td><td>Ng\u1eaft DC t\u1ea1i \u0111\u1ea7u v\u00e0o L v\u00e0 R<\/td><\/tr><tr><td>3<\/td><td>\u0110i\u1ec7n tr\u1edf 10k\u03a9<\/td><td>16<\/td><td>M\u1ed7i op-amp 1 tr\u1edf \u0111\u1ea7u v\u00e0o<\/td><\/tr><tr><td>4<\/td><td>Jack RCA \u0111\u1ea7u v\u00e0o<\/td><td>2<\/td><td>1 cho L, 1 cho R<\/td><\/tr><tr><td>5<\/td><td>Jack RCA \u0111\u1ea7u ra<\/td><td>16<\/td><td>8 cho L, 8 cho R<\/td><\/tr><tr><td>6<\/td><td>T\u1ee5 l\u1ecdc ngu\u1ed3n 100uF<\/td><td>2<\/td><td>C\u1ea5p ngu\u1ed3n \u1ed5n \u0111\u1ecbnh cho IC<\/td><\/tr><tr><td>7<\/td><td>Ngu\u1ed3n \u00b112V<\/td><td>1<\/td><td>Ngu\u1ed3n \u0111\u1ed1i x\u1ee9ng \u00b112V ho\u1eb7c 15V<\/td><\/tr><tr><td>8<\/td><td>PCB ho\u1eb7c veroboard<\/td><td>1<\/td><td>B\u1ed1 tr\u00ed m\u1ea1ch<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p><strong>\u26a1 S\u01a1 \u0111\u1ed3 nguy\u00ean l\u00fd<\/strong><\/p>\n\n\n\n<p>B\u1ea1n c\u00f3 th\u1ec3 xem s\u01a1 \u0111\u1ed3 nguy\u00ean l\u00fd minh h\u1ecda \u1edf h\u00ecnh ph\u00eda tr\u00ean, m\u00f4 t\u1ea3 r\u00f5 c\u00e1ch IC 4558 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 chia t\u00edn hi\u1ec7u L\/R th\u00e0nh 8 \u0111\u1ea7u ra m\u1ed7i k\u00eanh. M\u1ed7i op-amp ho\u1ea1t \u0111\u1ed9ng \u1edf ch\u1ebf \u0111\u1ed9 buffer, \u0111\u1ea3m b\u1ea3o t\u00edn hi\u1ec7u kh\u00f4ng suy hao.<\/p>\n\n\n\n<p><strong>\ud83d\udccc \u01afu \u0111i\u1ec3m c\u1ee7a m\u1ea1ch chia RCA stereo d\u00f9ng IC 4558<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Kh\u00f4ng suy hao t\u00edn hi\u1ec7u<\/li>\n\n\n\n<li>Ch\u1ea5t l\u01b0\u1ee3ng \u00e2m thanh t\u1ed1t, \u00edt m\u00e9o<\/li>\n\n\n\n<li>D\u1ec5 m\u1edf r\u1ed9ng h\u1ec7 th\u1ed1ng loa, ampli ho\u1eb7c mixer<\/li>\n\n\n\n<li>DIY \u0111\u01a1n gi\u1ea3n, chi ph\u00ed th\u1ea5p<\/li>\n<\/ul>\n\n\n\n<p><strong>\ud83e\uddea \u1ee8ng d\u1ee5ng th\u1ef1c t\u1ebf<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>D\u00e0n \u00e2m thanh gia \u0111\u00ecnh nhi\u1ec1u loa<\/li>\n\n\n\n<li>H\u1ec7 th\u1ed1ng ph\u00e1t th\u00f4ng b\u00e1o nhi\u1ec1u ph\u00f2ng<\/li>\n\n\n\n<li>Ph\u00f2ng thu \u00e2m, karaoke chuy\u00ean nghi\u1ec7p<\/li>\n\n\n\n<li>Truy\u1ec1n t\u00edn hi\u1ec7u t\u1eeb 1 \u0111\u1ea7u ph\u00e1t \u0111\u1ebfn nhi\u1ec1u ampli<\/li>\n<\/ul>\n\n\n\n<p><strong>\ud83e\udde0 K\u1ebft lu\u1eadn<\/strong><\/p>\n\n\n\n<p>N\u1ebfu b\u1ea1n \u0111ang t\u00ecm ki\u1ebfm m\u1ed9t gi\u1ea3i ph\u00e1p \u0111\u01a1n gi\u1ea3n, ti\u1ebft ki\u1ec7m \u0111\u1ec3 chia t\u00edn hi\u1ec7u RCA stereo m\u00e0 v\u1eabn \u0111\u1ea3m b\u1ea3o \u00e2m thanh ch\u1ea5t l\u01b0\u1ee3ng cao, m\u1ea1ch chia 1 v\u00e0o 8 ra d\u00f9ng IC 4558 l\u00e0 l\u1ef1a ch\u1ecdn l\u00fd t\u01b0\u1edfng. B\u1ea1n c\u00f3 th\u1ec3 d\u1ec5 d\u00e0ng t\u1ef1 l\u00e0m t\u1ea1i nh\u00e0 v\u1edbi c\u00e1c linh ki\u1ec7n ph\u1ed5 th\u00f4ng.<\/p>\n\n\n\n<p>T\u1eeb kh\u00f3a SEO g\u1ee3i \u00fd:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>m\u1ea1ch chia RCA stereo<\/li>\n\n\n\n<li>chia t\u00edn hi\u1ec7u \u00e2m thanh RCA 1 ra 8<\/li>\n\n\n\n<li>m\u1ea1ch chia RCA d\u00f9ng IC 4558<\/li>\n\n\n\n<li>active audio splitter DIY<\/li>\n\n\n\n<li>m\u1ea1ch buffer t\u00edn hi\u1ec7u \u00e2m thanh<\/li>\n<\/ul>\n\n\n\n<p>Li\u00ean h\u1ec7 nh\u1eadn file PDF &amp; s\u01a1 \u0111\u1ed3 chi ti\u1ebft:<\/p>\n\n\n\n<p>\ud83d\udce7 trungvu27@gmail.com<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Trong h\u1ec7 th\u1ed1ng \u00e2m thanh hi\u1ec7n \u0111\u1ea1i, vi\u1ec7c chia t\u00edn hi\u1ec7u t\u1eeb m\u1ed9t ngu\u1ed3n ph\u00e1t duy nh\u1ea5t \u0111\u1ebfn nhi\u1ec1u thi\u1ebft b\u1ecb \u0111\u1ea7u ra m\u00e0 v\u1eabn \u0111\u1ea3m b\u1ea3o ch\u1ea5t l\u01b0\u1ee3ng l\u00e0 r\u1ea5t quan tr\u1ecdng. M\u1ea1ch chia RCA stereo 1 v\u00e0o 8 ra s\u1eed d\u1ee5ng IC 4558<\/p>\n","protected":false},"author":1,"featured_media":18989,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1944],"tags":[2112,2114,2108,2110,2111,2107,2113,2109],"class_list":["post-18987","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-dien-tu","tag-1-vao-8-ra","tag-che","tag-mach-chia-rca","tag-mo-rong-am-thanh","tag-ngo-ra-rca","tag-rca","tag-rca-stereo","tag-thiet-bi-am-thanh"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>M\u1ea1ch chia RCA Stereo 1 v\u00e0o 8 ra d\u00f9ng IC 4558 \u2013 Gi\u1ea3i ph\u00e1p t\u1ed1i \u01b0u - Trungvu.net<\/title>\n<meta name=\"description\" content=\"Trong h\u1ec7 th\u1ed1ng \u00e2m thanh hi\u1ec7n \u0111\u1ea1i, vi\u1ec7c chia t\u00edn hi\u1ec7u t\u1eeb m\u1ed9t ngu\u1ed3n ph\u00e1t duy nh\u1ea5t \u0111\u1ebfn nhi\u1ec1u thi\u1ebft b\u1ecb \u0111\u1ea7u ra m\u00e0 v\u1eabn \u0111\u1ea3m b\u1ea3o ch\u1ea5t l\u01b0\u1ee3ng l\u00e0 r\u1ea5t\" class=\"yoast-seo-meta-tag\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/trungvu.net\/wordpress\/mach-chia-rca-stereo-1-vao-8-ra-dung-ic-4558-giai-phap-toi-uu-cho-he-thong-am-thanh-da-thiet-bi\/\" class=\"yoast-seo-meta-tag\" \/>\n<meta property=\"og:locale\" content=\"vi_VN\" class=\"yoast-seo-meta-tag\" \/>\n<meta property=\"og:type\" content=\"article\" class=\"yoast-seo-meta-tag\" \/>\n<meta property=\"og:title\" content=\"M\u1ea1ch chia RCA Stereo 1 v\u00e0o 8 ra d\u00f9ng IC 4558 \u2013 Gi\u1ea3i ph\u00e1p t\u1ed1i \u01b0u - 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