{"id":3608,"date":"2025-12-31T15:04:08","date_gmt":"2025-12-31T15:04:08","guid":{"rendered":"https:\/\/nbaem.com\/?p=3608"},"modified":"2026-06-27T12:15:53","modified_gmt":"2026-06-27T12:15:53","slug":"why-do-speakers-have-magnets","status":"publish","type":"post","link":"https:\/\/nbaem.com\/vi\/why-do-speakers-have-magnets\/","title":{"rendered":"T\u1ea1i sao loa c\u00f3 nam ch\u00e2m Neodymium so v\u1edbi Ferrite"},"content":{"rendered":"<p>B\u1ea1n c\u00f3 th\u1ec3 nghe danh s\u00e1ch ph\u00e1t y\u00eau th\u00edch m\u1ed7i ng\u00e0y, nh\u01b0ng b\u1ea1n c\u00f3 t\u1eebng t\u1ef1 h\u1ecfi <strong>t\u1ea1i sao loa c\u00f3 nam ch\u00e2m<\/strong> b\u00ean trong ch\u00fang kh\u00f4ng?<\/p>\n<p>\u0110\u00f3 l\u00e0 m\u1ed9t c\u00e2u h\u1ecfi h\u1ee3p l\u00fd.<\/p>\n<p>D\u00f9 sao \u0111i n\u1eefa, kh\u1ed1i kim lo\u1ea1i n\u1eb7ng \u1ea5y kh\u00f4ng ch\u1ec9 \u0111\u1ec3 h\u1ed7 tr\u1ee3 c\u1ea5u tr\u00fac. \u0110\u00f3 l\u00e0 \u0111\u1ed9ng l\u1ef1c tuy\u1ec7t \u0111\u1ed1i c\u1ee7a h\u1ec7 th\u1ed1ng \u00e2m thanh c\u1ee7a b\u1ea1n.<\/p>\n<p>N\u1ebfu kh\u00f4ng c\u00f3 m\u1ed9t <strong>nam ch\u00e2m v\u0129nh c\u1eedu<\/strong>, m\u1ed9t loa ph\u00e1t \u00e2m th\u1ef1c ch\u1ea5t ch\u1ec9 l\u00e0 m\u1ed9t n\u00f3n gi\u1ea5y v\u00e0 m\u1ed9t cu\u1ed9n \u0111\u1ed3ng th\u00f4 l\u1eb7ng im. N\u00f3 d\u1ef1a v\u00e0o m\u1ed9t tr\u01b0\u1eddng t\u1eeb h\u1ecdc ch\u00ednh x\u00e1c \u0111\u1ec3 chuy\u1ec3n \u0111\u1ed5i n\u0103ng l\u01b0\u1ee3ng \u0111i\u1ec7n th\u00e0nh c\u00e1c dao \u0111\u1ed9ng c\u01a1 h\u1ecdc\u2014and cu\u1ed1i c\u00f9ng l\u00e0 s\u00f3ng \u00e2m thanh\u2014\u0111i t\u1edbi tai b\u1ea1n.<\/p>\n<p>Trong h\u01b0\u1edbng d\u1eabn n\u00e0y, ch\u00fang ta s\u1ebd nh\u00ecn v\u01b0\u1ee3t qua b\u1ec1 m\u1eb7t.<\/p>\n<p>B\u1ea1n s\u1ebd h\u1ecdc ch\u00ednh x\u00e1c c\u00e1ch <strong>t\u01b0\u01a1ng t\u00e1c \u0111i\u1ec7n t\u1eeb<\/strong> \u0111i\u1ec1u khi\u1ec3n \u00e2m thanh, s\u1ef1 kh\u00e1c bi\u1ec7t quan tr\u1ecdng gi\u1eefa <a href=\"https:\/\/en.wikipedia.org\/wiki\/Neodymium_magnet\" target=\"_blank\" rel=\"noopener\"><strong>nam ch\u00e2m neodymium<\/strong><\/a> v\u00e0 <a href=\"https:\/\/nbaem.com\/vi\/products\/ceramic-magnet\/\" target=\"_blank\" rel=\"noopener\"><strong>nam ch\u00e2m ferrite<\/strong><\/a>, v\u00e0 c\u00e1ch c\u00e1c v\u1eadt li\u1ec7u n\u00e0y x\u00e1c \u0111\u1ecbnh hi\u1ec7u su\u1ea5t c\u1ee7a m\u1ecdi th\u1ee9 t\u1eeb loa si\u00eau tr\u1ea7m kh\u1ed5ng l\u1ed3 \u0111\u1ebfn c\u00e1c tr\u00ecnh \u0111i\u1ec1u khi\u1ec3n \u0111i\u1ec7n tho\u1ea1i th\u00f4ng minh nh\u1ecf<\/p>\n<p>.<\/p>\n<p>H\u00e3y \u0111i th\u1eb3ng v\u00e0o v\u1ea5n \u0111\u1ec1.<\/p>\n<h2>L\u00e0 nh\u1eefng chuy\u00ean gia v\u1ec1 v\u1eadt li\u1ec7u t\u1eeb t\u00ednh ch\u00ednh x\u00e1c, ch\u00fang t\u00f4i \u1edf \u0111\u00e2y \u0111\u1ec3 cung c\u1ea5p cho b\u1ea1n ph\u00e2n t\u00edch k\u1ef9 thu\u1eadt m\u00e0 kh\u00f4ng c\u00f3 ph\u1ea7n hoa m\u1ef9.<\/h2>\n<p>\u0110\u1ec3 hi\u1ec3u t\u1ea1i sao ch\u00fang ta c\u1ea7n nam ch\u00e2m, tr\u01b0\u1edbc ti\u00ean ch\u00fang ta ph\u1ea3i xem nh\u1eefng g\u00ec th\u1ef1c s\u1ef1 \u1edf b\u00ean trong t\u1ee7. Ch\u00fang t\u00f4i g\u1ecdi \u0111\u1ed9ng c\u01a1 ch\u00ednh c\u1ee7a loa c\u1ee7a b\u1ea1n l\u00e0 <strong>driver<\/strong>. N\u00f3 c\u00f3 th\u1ec3 tr\u00f4ng gi\u1ed1ng nh\u01b0 m\u1ed9t m\u1ea3nh ph\u1ea7n c\u1ee9ng duy nh\u1ea5t, nh\u01b0ng th\u1ef1c t\u1ebf n\u00f3 l\u00e0 m\u1ed9t t\u1ed5 h\u1ee3p c\u00e1c b\u1ed9 ph\u1eadn ho\u1ea1t \u0111\u1ed9ng \u0111\u1ed3ng b\u1ed9 t\u1ed1t v\u1edbi nhau.<\/p>\n<p>Khi ch\u00fang ta nh\u00ecn v\u00e0o <strong>gi\u1ea3i ph\u1eabu tr\u00ecnh \u0111i\u1ec1u khi\u1ec3n loa<\/strong>, ch\u00fang ta \u0111ang l\u00e0m vi\u1ec7c v\u1edbi m\u1ed9t v\u00e0i th\u00e0nh ph\u1ea7n ch\u00ednh l\u00e0m cho <strong>c\u00f4ng ngh\u1ec7 loa \u0111\u1ed9ng<\/strong> tr\u1edf n\u00ean c\u00f3 th\u1ec3. D\u01b0\u1edbi \u0111\u00e2y l\u00e0 ph\u00e2n t\u00edch c\u00e1c b\u1ed9 ph\u1eadn thi\u1ebft y\u1ebfu:<\/p>\n<ul>\n<li><strong>Nam ch\u00e2m v\u0129nh c\u1eedu:<\/strong> \u0110\u00e2y l\u00e0 tr\u1ecdng l\u01b0\u1ee3ng n\u1eb7ng \u1edf ph\u00eda sau. N\u00f3 cung c\u1ea5p m\u1ed9t tr\u01b0\u1eddng t\u1eeb t\u0129nh, \u0111\u1ee9ng y\u00ean r\u1ea5t quan tr\u1ecdng cho h\u1ec7 th\u1ed1ng ho\u1ea1t \u0111\u1ed9ng.<\/li>\n<li><strong>Cu\u1ed9n Boss<\/strong> M\u1ed9t cu\u1ed9n d\u00e2y b\u1eb1ng \u0111\u1ed3ng ho\u1eb7c nh\u00f4m qu\u1ea5n quanh m\u1ed9t h\u00ecnh tr\u1ee5 (bobbin). N\u00f3 n\u1eb1m ngay b\u00ean trong khe h\u1edf c\u1ee7a nam ch\u00e2m.<\/li>\n<li><strong>M\u00e0ng ng\u00e2m (\u00c2m thanh):<\/strong> \u0110\u00e2y l\u00e0 ph\u1ea7n b\u1ea1n nh\u00ecn th\u1ea5y th\u1ef1c s\u1ef1 chuy\u1ec3n \u0111\u1ed9ng. N\u00f3 \u0111\u1ea9y kh\u00f4ng kh\u00ed \u0111\u1ec3 t\u1ea1o ra s\u00f3ng \u00e2m.<\/li>\n<li><strong>D\u00e2y treo (Spider &amp; Surround):<\/strong> Nh\u1eefng b\u1ed9 ph\u1eadn n\u00e0y gi\u1eef cho cu\u1ed9n voice \u0111\u01b0\u1ee3c c\u0103n gi\u1eefa v\u00e0 cho ph\u00e9p m\u00e0ng loa di chuy\u1ec3n l\u00ean xu\u1ed1ng m\u1ed9t c\u00e1ch ki\u1ec3m so\u00e1t.<\/li>\n<li><strong>Khung (Basket):<\/strong> b\u1ed9 x\u01b0\u01a1ng c\u1ee9ng c\u00e1p gi\u1eef m\u1ecdi th\u1ee9 l\u1ea1i v\u1edbi nhau.<\/li>\n<\/ul>\n<p>c\u1ea3 <strong>tr\u1ecdng magnets trong loa<\/strong> \u0111\u00f3ng vai tr\u00f2 nh\u01b0 m\u1ecf neo. N\u1ebfu kh\u00f4ng c\u00f3 n\u00f3, l\u01b0\u1ee3ng \u0111i\u1ec7n ch\u1ea1y v\u00e0o loa s\u1ebd kh\u00f4ng c\u00f3 g\u00ec \u0111\u1ec3 \u0111\u1ea9y against, v\u00e0 b\u1ea1n s\u1ebd c\u00f3 \u00e2m thanh b\u1eb1ng 0.<\/p>\n<hr \/>\n<p><strong>B\u1ea1n c\u00f3 mu\u1ed1n t\u00f4i gi\u1ea3i th\u00edch ch\u00ednh x\u00e1c c\u00e1ch \u0111i\u1ec7n d\u1eabn \u0111\u1ed9ng b\u1eb1ng nh\u1eefng b\u1ed9 ph\u1eadn n\u00e0y kh\u00f4ng?<\/strong><\/p>\n<h2>C\u00e1ch loa ho\u1ea1t \u0111\u1ed9ng: V\u1eadt l\u00fd c\u1ee7a \u0111i\u1ec7n t\u1eeb<\/h2>\n<div id=\"attachment_1732\" style=\"width: 524px\" class=\"wp-caption alignnone\"><img decoding=\"async\" aria-describedby=\"caption-attachment-1732\" class=\"wp-image-1732\" src=\"https:\/\/nbaem.com\/wp-content\/uploads\/2025\/07\/permanent-magnet-in-speaker-1024x923.jpg\" alt=\"nam ch\u00e2m v\u0129nh c\u1eedu trong loa\" width=\"514\" height=\"464\" srcset=\"https:\/\/nbaem.com\/wp-content\/uploads\/2025\/07\/permanent-magnet-in-speaker-200x180.jpg 200w, https:\/\/nbaem.com\/wp-content\/uploads\/2025\/07\/permanent-magnet-in-speaker-300x270.jpg 300w, https:\/\/nbaem.com\/wp-content\/uploads\/2025\/07\/permanent-magnet-in-speaker-400x360.jpg 400w, https:\/\/nbaem.com\/wp-content\/uploads\/2025\/07\/permanent-magnet-in-speaker-600x541.jpg 600w, https:\/\/nbaem.com\/wp-content\/uploads\/2025\/07\/permanent-magnet-in-speaker-768x692.jpg 768w, https:\/\/nbaem.com\/wp-content\/uploads\/2025\/07\/permanent-magnet-in-speaker-800x721.jpg 800w, https:\/\/nbaem.com\/wp-content\/uploads\/2025\/07\/permanent-magnet-in-speaker-1024x923.jpg 1024w, https:\/\/nbaem.com\/wp-content\/uploads\/2025\/07\/permanent-magnet-in-speaker-1200x1081.jpg 1200w, https:\/\/nbaem.com\/wp-content\/uploads\/2025\/07\/permanent-magnet-in-speaker.jpg 1212w\" sizes=\"(max-width: 514px) 100vw, 514px\" \/><p id=\"caption-attachment-1732\" class=\"wp-caption-text\">nam ch\u00e2m v\u0129nh c\u1eedu trong loa<\/p><\/div>\n<p>Khi ch\u00fang ta b\u00f3c l\u1edbp, ph\u00e9p m\u00e0u c\u1ee7a t\u00e1i t\u1ea1o \u00e2m thanh th\u1ef1c s\u1ef1 tr\u1edf th\u00e0nh <strong>\u0111i\u1ec7n t\u1eeb trong loa<\/strong>. T\u1ea5t nhi\u00ean kh\u00f4ng ph\u1ea3i ph\u00e9p thu\u1eadt\u2014\u0111\u00f3 l\u00e0 v\u1eadt l\u00fd. \u0110\u1ec3 hi\u1ec3u t\u1ea1i sao loa c\u00f3 nam ch\u00e2m, ch\u00fang ta ph\u1ea3i xem x\u00e9t c\u00e1ch n\u0103ng l\u01b0\u1ee3ng \u0111i\u1ec7n chuy\u1ec3n \u0111\u1ed5i sang n\u0103ng l\u01b0\u1ee3ng c\u01a1 h\u1ecdc, v\u00e0 cu\u1ed1i c\u00f9ng th\u00e0nh c\u00e1c s\u00f3ng \u00e2m thanh ch\u00fang ta nghe.<\/p>\n<p>To\u00e0n b\u1ed9 qu\u00e1 tr\u00ecnh ph\u1ee5 thu\u1ed9c v\u00e0o m\u1ed1i quan h\u1ec7 gi\u1eefa <strong>nam ch\u00e2m v\u0129nh c\u1eedu<\/strong> v\u00e0 cu\u1ed9n voice. D\u01b0\u1edbi \u0111\u00e2y l\u00e0 ph\u00e2n t\u00edch t\u1eebng b\u01b0\u1edbc c\u1ee7a <strong>c\u00e1ch loa ph\u00e1t ra \u00e2m thanh<\/strong>:<\/p>\n<ul>\n<li><strong>T\u00edn hi\u1ec7u \u0111i\u1ec7n:<\/strong> M\u1ed9t ngu\u1ed3n \u0111i\u1ec7n xoay chi\u1ec1u (AC) t\u1eeb ampli c\u1ee7a b\u1ea1n \u0111\u01b0\u1ee3c g\u1eedi v\u00e0o cu\u1ed9n voice c\u1ee7a loa. \u0110\u00e2y kh\u00f4ng ch\u1ec9 l\u00e0 c\u00f4ng su\u1ea5t th\u00f4; n\u00f3 mang th\u00f4ng tin \u00e2m thanh (t\u1ea7n s\u1ed1 v\u00e0 bi\u00ean \u0111\u1ed9).<\/li>\n<li><strong>T\u1ea1o m\u1ed9t Tr\u01b0\u1eddng t\u1eeb bi\u1ebfn \u0111\u1ed5i:<\/strong> Khi d\u00f2ng \u0111i\u1ec7n ch\u1ea1y qua cu\u1ed9n, n\u00f3 t\u1ea1o ra m\u1ed9t t\u1eeb tr\u01b0\u1eddng. V\u00ec t\u00edn hi\u1ec7u \u00e2m thanh l\u00e0 xoay chi\u1ec1u (AC), \u0111\u1ed9 thu\u1eadn ngh\u1ecbch c\u1ee7a tr\u01b0\u1eddng t\u1eeb n\u00e0y l\u1eadt v\u00e0 quay nhanh ch\u00f3ng \u2014 chuy\u1ec3n t\u1eeb B\u1eafc sang Nam v\u00e0 ng\u01b0\u1ee3c l\u1ea1i.<\/li>\n<li><strong>T\u01b0\u01a1ng t\u00e1c c\u1ee7a Cu\u1ed9n voice:<\/strong> \u0110\u00e2y l\u00e0 n\u01a1i <strong>tr\u1ecdng magnets trong loa<\/strong> l\u00e0m c\u00f4ng vi\u1ec7c c\u1ee7a n\u00f3. Tr\u01b0\u1eddng t\u1eeb c\u1ed1 \u0111\u1ecbnh c\u1ee7a nam ch\u00e2m v\u0129nh c\u1eedu bao quanh cu\u1ed9n voice.<\/li>\n<li><strong>\u0110\u1ea9y v\u00e0 k\u00e9o:<\/strong> C\u00e1c \u0111\u1ecbnh lu\u1eadt v\u1eadt l\u00fd c\u01a1 b\u1ea3n cho ch\u00fang ta bi\u1ebft r\u1eb1ng c\u00e1c c\u1ef1c gi\u1ed1ng nhau \u0111\u1ea9y nhau v\u00e0 c\u00e1c c\u1ef1c tr\u00e1i ng\u01b0\u1ee3c h\u00fat nhau. Khi c\u1ef1c c\u1ee7a cu\u1ed9n voice t\u1ea1o ra m\u1ed9t tr\u01b0\u1eddng t\u1eeb dao \u0111\u1ed9ng, n\u00f3 ngay l\u1eadp t\u1ee9c b\u1ecb \u0111\u1ea9y v\u00e0 k\u00e9o ng\u01b0\u1ee3c l\u1ea1i v\u1edbi tr\u01b0\u1eddng t\u0129nh c\u1ee7a nam ch\u00e2m v\u0129nh c\u1eedu.<\/li>\n<li><strong>Rung \u0111\u1ed9ng c\u1ee7a \u0110\u1ea7u loa:<\/strong> S\u1ee9c h\u00fat v\u00e0 \u0111\u1ea9y nhanh ch\u00f3ng n\u00e0y b\u1eaft bu\u1ed9c cu\u1ed9n di chuy\u1ec3n qua l\u1ea1i. V\u00ec cu\u1ed9n \u0111\u01b0\u1ee3c g\u1eafn v\u00e0o m\u00e0ng ng\u0103n (\u0111\u1ea7u loa), s\u1ef1 chuy\u1ec3n \u0111\u1ed9ng n\u00e0y t\u1ea1o ra <strong>rung \u0111\u1ed9ng c\u1ee7a \u0111\u1ea7u loa<\/strong>, \u0111\u1ea9y kh\u00f4ng kh\u00ed \u0111\u1ec3 t\u1ea1o \u00e2m thanh.<\/li>\n<\/ul>\n<p>Tr\u01b0\u1eddng t\u1eeb m\u1ea1nh h\u01a1n <strong>trong loa<\/strong>, c\u00e0ng nhi\u1ec1u ki\u1ec3m so\u00e1t ch\u00fang ta c\u00f3 \u0111\u1ed1i v\u1edbi s\u1ef1 di chuy\u1ec3n n\u00e0y. Trong k\u1ef9 thu\u1eadt \u00e2m thanh hi\u1ec7u su\u1ea5t cao, \u0111\u00f4i khi ch\u00fang ta s\u1eed d\u1ee5ng c\u00e1c c\u1ea5u h\u00ecnh ti\u00ean ti\u1ebfn nh\u01b0 m\u1ed9t <strong><a href=\"https:\/\/nbaem.com\/vi\/products\/halbach-array\/\" target=\"_blank\" rel=\"noopener\">M\u1ea3ng Halbach<\/a> <\/strong>\u0111\u1ec3 t\u1eadp trung flux t\u1eeb t\u1eeb tr\u01b0\u1eddng t\u1eeb t\u00ednh n\u00e0y ch\u00ednh x\u00e1c \u1edf n\u01a1i c\u1ea7n thi\u1ebft, t\u0103ng hi\u1ec7u qu\u1ea3 v\u00e0 gi\u1ea3m m\u00e9o<\/p>\n<p>Cu\u1ed1i c\u00f9ng, nam ch\u00e2m cung c\u1ea5p n\u1ec1n t\u1ea3ng \u1ed5n \u0111\u1ecbnh m\u00e0 <strong>loa l\u1ea5y l\u1ef1c \u0111i\u1ec7n t\u1eeb<\/strong> \u0111\u1ea9y ra \u0111\u1ed1i m\u1eb7t. N\u1ebfu kh\u00f4ng c\u00f3 tr\u01b0\u1eddng t\u1eeb c\u1ed1 \u0111\u1ecbnh \u0111\u00f3, cu\u1ed9n voice s\u1ebd ch\u1ec9 n\u00f3ng l\u00ean m\u00e0 kh\u00f4ng \u0111\u1ea9y kh\u00f4ng kh\u00ed, v\u00e0 ch\u00fang ta s\u1ebd kh\u00f4ng nghe th\u1ea5y g\u00ec.<\/p>\n<h3>Key Factors in Dynamic Speaker Technology<\/h3>\n<p>Khi ch\u00fang ta nh\u00ecn v\u00e0o <strong>c\u00f4ng ngh\u1ec7 loa \u0111\u1ed9ng<\/strong>, the efficiency of this energy conversion depends heavily on the gap between the coil and the magnet.<\/p>\n<ul>\n<li><strong>Field Strength:<\/strong> A stronger magnet allows for a more forceful reaction to the electrical signal.<\/li>\n<li><strong>Gap Precision:<\/strong> The tighter the gap between the coil and magnet, the more efficient the motor system.<\/li>\n<li><strong>Thermal Handling:<\/strong> The process generates heat, so the magnet and assembly must handle high temperatures without losing magnetism.<\/li>\n<\/ul>\n<p>Would you like me to analyze the specific pros and cons of different magnet materials like Neodymium versus Ferrite for your specific application?<\/p>\n<h2>Common Types of Magnets in Speakers<\/h2>\n<p>When we look at the raw components of a driver, it is clear that not all <strong>loudspeaker magnets<\/strong> are created equal. The material we choose dictates the weight, the cost, and ultimately, the sonic profile of the device. In the global audio market, we generally deal with three primary contenders: Ferrite, Neodymium, and Alnico. Each plays a distinct role in <strong>magnet types for audio<\/strong>.<\/p>\n<h3>Nam ch\u00e2m Ferrite (G\u1ed1m)<\/h3>\n<p>If you have ever lifted a heavy hi-fi speaker or a subwoofer, you were likely feeling the weight of <strong>ferrite ceramic magnets audio<\/strong> components. These are the industry workhorses. Made from iron oxide and strontium carbonate, they are cost-effective and highly resistant to corrosion. While they are heavy and require a larger size to generate the same magnetic field as newer materials, they handle heat exceptionally well. This makes them ideal for large home audio systems where size isn\u2019t a constraint.<\/p>\n<h3><a href=\"https:\/\/nbaem.com\/vi\/products\/neodymium-magnet\/\" target=\"_blank\" rel=\"noopener\">Nam ch\u00e2m Neodymium (NdFeB)<\/a><\/h3>\n<p>Neodymium is the game-changer for modern, portable audio. These rare-earth magnets pack an incredible magnetic flux density into a tiny footprint. In fact, <a href=\"https:\/\/nbaem.com\/pt_pt\/neodymium-magnets-2\/\">nam ch\u00e2m neodymium<\/a> can be one-tenth the weight of a ferrite magnet while providing the same power. This high strength-to-weight ratio is why we use <strong>neodymium speaker magnets<\/strong> in everything from high-end tweeters to lightweight line arrays and headphones. If you need powerful sound in a compact package, this is the standard.<\/p>\n<h3>Nam Ch\u00e2m Alnico<\/h3>\n<p>Before the rise of ferrite, Alnico (an alloy of Aluminum, Nickel, and Cobalt) was the king. Today, we mostly see it in high-end guitar amplifiers and vintage reissues because <strong>alnico magnets sound<\/strong> distinctively warm and natural. They are expensive and can be prone to demagnetization at very high power, but for specific tonal applications, they remain unbeatable.<\/p>\n<h3>Speaker Magnet Comparison at a Glance<\/h3>\n<p>To help you understand the trade-offs in <strong>nam ch\u00e2m \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong \u0111i\u1ec7n t\u1eed ti\u00eau d\u00f9ng<\/strong>, here is a quick breakdown of how these materials stack up:<\/p>\n<ul>\n<li><strong>S\u1eaft t\u1eeb:<\/strong> Low cost, Heavy weight, Large size, Good heat resistance.<\/li>\n<li><strong>Neodymium:<\/strong> High cost, Extremely light, Compact size, Strongest magnetic field.<\/li>\n<li><strong>Alnico:<\/strong> High cost, Medium weight, \u201cVintage\u201d tone, Low coercivity.<\/li>\n<\/ul>\n<p>Choosing the right material depends entirely on the application. We wouldn\u2019t put a heavy ferrite magnet in a pair of jogging headphones, just as we might prefer the classic response of Alnico for a blues guitar amp. Understanding this <strong>speaker magnet comparison<\/strong> helps us appreciate why different speakers are built the way they are.<\/p>\n<hr \/>\n<p><strong>Would you like me to draft the next section on \u201cWhy Magnet Choice Impacts Speaker Performance\u201d to explain how these materials affect sensitivity and distortion?<\/strong><\/p>\n<h2>cURL Too many subrequests by single Worker invocation. To configure this limit, refer to https:\/\/developers.cloudflare.com\/workers\/wrangler\/configuration\/#limits<\/h2>\n<p>cURL Too many subrequests by single Worker invocation. To configure this limit, refer to https:\/\/developers.cloudflare.com\/workers\/wrangler\/configuration\/#limits<\/p>\n<p>cURL Too many subrequests by single Worker invocation. To configure this limit, refer to https:\/\/developers.cloudflare.com\/workers\/wrangler\/configuration\/#limits <strong>cURL Too many subrequests by single Worker invocation. To configure this limit, refer to https:\/\/developers.cloudflare.com\/workers\/wrangler\/configuration\/#limits<\/strong> cURL Too many subrequests by single Worker invocation. To configure this limit, refer to https:\/\/developers.cloudflare.com\/workers\/wrangler\/configuration\/#limits<\/p>\n<ul>\n<li><strong>cURL Too many subrequests by single Worker invocation. To configure this limit, refer to https:\/\/developers.cloudflare.com\/workers\/wrangler\/configuration\/#limits<\/strong><br \/>\ncURL Too many subrequests by single Worker invocation. To configure this limit, refer to https:\/\/developers.cloudflare.com\/workers\/wrangler\/configuration\/#limits <a href=\"https:\/\/nbaem.com\/vi\/magnetic-flux-and-surface-gauss\/\" target=\"_blank\" rel=\"noopener\">Flux t\u1eeb tr\u01b0\u1eddng v\u00e0 gauss b\u1ec1 m\u1eb7t<\/a> cURL Too many subrequests by single Worker invocation. To configure this limit, refer to https:\/\/developers.cloudflare.com\/workers\/wrangler\/configuration\/#limits<\/li>\n<li><strong>cURL Too many subrequests by single Worker invocation. To configure this limit, refer to https:\/\/developers.cloudflare.com\/workers\/wrangler\/configuration\/#limits<\/strong><br \/>\ncURL Too many subrequests by single Worker invocation. To configure this limit, refer to https:\/\/developers.cloudflare.com\/workers\/wrangler\/configuration\/#limits <strong>cURL Too many subrequests by single Worker invocation. To configure this limit, refer to https:\/\/developers.cloudflare.com\/workers\/wrangler\/configuration\/#limits<\/strong> cURL Too many subrequests by single Worker invocation. To configure this limit, refer to https:\/\/developers.cloudflare.com\/workers\/wrangler\/configuration\/#limits <strong>cURL Too many subrequests by single Worker invocation. To configure this limit, refer to https:\/\/developers.cloudflare.com\/workers\/wrangler\/configuration\/#limits<\/strong> cURL Too many subrequests by single Worker invocation. To configure this limit, refer to https:\/\/developers.cloudflare.com\/workers\/wrangler\/configuration\/#limits<\/li>\n<li><strong>cURL Too many subrequests by single Worker invocation. To configure this limit, refer to https:\/\/developers.cloudflare.com\/workers\/wrangler\/configuration\/#limits<\/strong><br \/>\ncURL Too many subrequests by single Worker invocation. To configure this limit, refer to https:\/\/developers.cloudflare.com\/workers\/wrangler\/configuration\/#limits <strong>trong loa<\/strong> cURL Too many subrequests by single Worker invocation. To configure this limit, refer to https:\/\/developers.cloudflare.com\/workers\/wrangler\/configuration\/#limits<\/li>\n<\/ul>\n<p>cURL Too many subrequests by single Worker invocation. To configure this limit, refer to https:\/\/developers.cloudflare.com\/workers\/wrangler\/configuration\/#limits <strong>t\u1ea1i sao loa c\u00f3 nam ch\u00e2m<\/strong> cURL Too many subrequests by single Worker invocation. To configure this limit, refer to https:\/\/developers.cloudflare.com\/workers\/wrangler\/configuration\/#limits<\/p>\n<p>cURL Too many subrequests by single Worker invocation. To configure this limit, refer to https:\/\/developers.cloudflare.com\/workers\/wrangler\/configuration\/#limits<\/p>\n<h2>C\u00e1c c\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p v\u1ec1 nam ch\u00e2m loa<\/h2>\n<p>cURL Too many subrequests by single Worker invocation. To configure this limit, refer to https:\/\/developers.cloudflare.com\/workers\/wrangler\/configuration\/#limits <strong>loudspeaker magnets<\/strong>cURL Too many subrequests by single Worker invocation. To configure this limit, refer to https:\/\/developers.cloudflare.com\/workers\/wrangler\/configuration\/#limits <strong>tr\u1ecdng magnets trong loa<\/strong>.<\/p>\n<h3>cURL Too many subrequests by single Worker invocation. To configure this limit, refer to https:\/\/developers.cloudflare.com\/workers\/wrangler\/configuration\/#limits<\/h3>\n<p>cURL Too many subrequests by single Worker invocation. To configure this limit, refer to https:\/\/developers.cloudflare.com\/workers\/wrangler\/configuration\/#limits <strong>cURL Too many subrequests by single Worker invocation. To configure this limit, refer to https:\/\/developers.cloudflare.com\/workers\/wrangler\/configuration\/#limits<\/strong>. V\u1ec1 ch\u1ea5t l\u01b0\u1ee3ng k\u1ef9 thu\u1eadt v\u00e0 v\u1eadt li\u1ec7u \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng, ch\u1ee9 kh\u00f4ng ph\u1ea3i ch\u1ec9 tr\u1ecdng l\u01b0\u1ee3ng v\u1eadt l\u00fd.<\/p>\n<h3>Nam ch\u00e2m Neodymium c\u00f3 x\u1ee9ng \u0111\u00e1ng v\u1edbi chi ph\u00ed b\u1ed5 sung kh\u00f4ng?<\/h3>\n<p><strong>cURL Too many subrequests by single Worker invocation. To configure this limit, refer to https:\/\/developers.cloudflare.com\/workers\/wrangler\/configuration\/#limits<\/strong> l\u1edbn h\u01a1n nhi\u1ec1u so v\u1edbi nam ch\u00e2m ceramic, nh\u01b0ng \u0111\u1ed1i v\u1edbi nhi\u1ec1u \u1ee9ng d\u1ee5ng, ch\u00fang \u0111\u00e1ng t\u1eebng \u0111\u1ed3ng. N\u1ebfu b\u1ea1n c\u1ea7n m\u1ed9t b\u1ed9 khu\u1ebfch \u0111\u1ea1i nh\u1eb9\u2014nh\u01b0 trong loa Bluetooth di \u0111\u1ed9ng ho\u1eb7c \u00e2m thanh \u00f4 t\u00f4 n\u01a1i tr\u1ecdng l\u01b0\u1ee3ng \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn hi\u1ec7u su\u1ea5t\u2014neodymium l\u00e0 ti\u00eau chu\u1ea9n. N\u00f3 cung c\u1ea5p c\u00f4ng su\u1ea5t m\u1ea1nh m\u1ebd trong m\u1ed9t kh\u00f4ng gian r\u1ea5t nh\u1ecf.<\/p>\n<h3>Nam ch\u00e2m loa c\u00f3 hao m\u00f2n kh\u00f4ng?<\/h3>\n<p>M\u1ecdi ng\u01b0\u1eddi th\u01b0\u1eddng lo l\u1eafng r\u1eb1ng loa c\u1ee7a h\u1ecd s\u1ebd m\u1ea5t c\u00f4ng su\u1ea5t theo th\u1eddi gian. N\u00f3i chung, nam ch\u00e2m ch\u1ea5t l\u01b0\u1ee3ng cao r\u1ea5t \u1ed5n \u0111\u1ecbnh. B\u1ea1n c\u00f3 th\u1ec3 \u0111\u1ecdc th\u00eam v\u1ec1 <a href=\"https:\/\/nbaem.com\/vi\/how-long-do-magnets-last\/\" target=\"_blank\" rel=\"noopener\">bao l\u00e2u nam ch\u00e2m duy tr\u00ec \u0111i\u1ec7n t\u00edch c\u1ee7a ch\u00fang<\/a> \u0111\u1ec3 hi\u1ec3u t\u1ea1i sao loa c\u1ed5 \u0111i\u1ec3n c\u1ee7a b\u1ea1n c\u00f3 kh\u1ea3 n\u0103ng v\u1eabn nghe hay. Tr\u1eeb khi ch\u00fang ti\u1ebfp x\u00fac v\u1edbi nhi\u1ec7t \u0111\u1ed9 c\u1ef1c cao ho\u1eb7c b\u1ecb h\u01b0 h\u1ecfng v\u1eadt l\u00fd, tr\u01b0\u1eddng t\u1eeb v\u1eabn \u1ed5n \u0111\u1ecbnh qua nhi\u1ec1u th\u1eadp k\u1ef7.<\/p>\n<h3>M\u1ed9t loa c\u00f3 ho\u1ea1t \u0111\u1ed9ng \u0111\u01b0\u1ee3c m\u00e0 kh\u00f4ng c\u00f3 nam ch\u00e2m kh\u00f4ng?<\/h3>\n<p>V\u1ec1 m\u1eb7t k\u1ef9 thu\u1eadt, c\u00f3, nh\u01b0ng hi h\u1eefu. Loa t\u0129nh \u0111i\u1ec7n s\u1eed d\u1ee5ng \u0111i\u1ec7n t\u00edch t\u0129nh cao \u0111\u1ec3 di chuy\u1ec3n m\u1ed9t t\u1ea5m m\u00e0ng thay v\u00ec m\u1ed9t h\u1ec7 th\u1ed1ng \u0111\u1ed9ng c\u01a1 t\u1eeb. Tuy nhi\u00ean, \u0111\u1ed1i v\u1edbi 99% c\u1ee7a thi\u1ebft b\u1ecb \u00e2m thanh ch\u00fang ta d\u00f9ng h\u00e0ng ng\u00e0y, s\u1ef1 t\u01b0\u01a1ng t\u00e1c gi\u1eefa cu\u1ed9n voice v\u00e0 nam ch\u00e2m l\u00e0 c\u1ea7n thi\u1ebft \u0111\u1ec3 t\u1ea1o ra \u00e2m thanh.<\/p>\n<h3>B\u1ea1n c\u00f3 mu\u1ed1n t\u00f4i tr\u1ee3 gi\u00fap so s\u00e1nh c\u00e1c c\u1ea5p nam ch\u00e2m c\u1ee5 th\u1ec3 cho d\u1ef1 \u00e1n \u00e2m thanh ti\u1ebfp theo c\u1ee7a b\u1ea1n kh\u00f4ng? Vui l\u00f2ng li\u00ean h\u1ec7 v\u1edbi ch\u00fang t\u00f4i b\u1ea5t c\u1ee9 l\u00fac n\u00e0o.<\/h3>\n<div id=\"references\" class=\"min-w-0 scroll-mt-8 overflow-hidden\">\n<div class=\"text-[16px]\"><\/div>\n<div class=\"flex flex-col gap-2 text-sm leading-relaxed\">\n<div class=\"break-words text-[1em] leading-7\"><\/div>\n<\/div>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>Kh\u00e1m ph\u00e1 l\u00fd do t\u1ea1i sao loa c\u00f3 nam ch\u00e2m v\u00e0 c\u00e1ch ch\u00fang ph\u00e1t \u00e2m thanh. So s\u00e1nh lo\u1ea1i neodymium v\u00e0 ferrite trong h\u01b0\u1edbng d\u1eabn c\u00f4ng ngh\u1ec7 \u00e2m thanh thi\u1ebft y\u1ebfu n\u00e0y.<\/p>","protected":false},"author":1,"featured_media":1730,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"om_disable_all_campaigns":false,"_monsterinsights_skip_tracking":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[34],"tags":[],"class_list":["post-3608","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-ferrite-magnet"],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"https:\/\/nbaem.com\/wp-content\/uploads\/2025\/07\/Speaker-magnet.jpg","_links":{"self":[{"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/posts\/3608","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/comments?post=3608"}],"version-history":[{"count":1,"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/posts\/3608\/revisions"}],"predecessor-version":[{"id":3618,"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/posts\/3608\/revisions\/3618"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/media\/1730"}],"wp:attachment":[{"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/media?parent=3608"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/categories?post=3608"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/tags?post=3608"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}