{"product_id":"power-filter-board-4a-emi-filter-sound-booster-filter-socket-double-sided-immersion-gold-pcb","title":"Power Filter Board with 4A EMI Filter – Sound Improvement Tool, Filter Socket, Double-Sided Immersion Gold PCB","description":"\u003cdiv class=\"hb_v3_client_1303500\" style=\"margin: 0 0 5.0px 0;text-align: center;\"\u003e \u003c\/div\u003e\n\n\u003ch3 style=\"margin-top: 0.0px;margin-bottom: 0.0px;font-size: 16.0px;min-height: 21.0px;color: #3c3c3c;\"\u003e\u003cspan style=\"font-size: 24.0px;\"\u003ePower filter board 2A 4A 18A EMI filter, sound booster, filter socket\u003cspan style=\"color: #ff0000;\"\u003eThe kit needs to be welded, plus 3 yuan for replacement welding.\u003c\/span\u003e\u003c\/span\u003e\u003c\/h3\u003e\n\n\u003cp\u003e\u003cspan style=\"font-size: 24.0px;line-height: 1.5;\"\u003ePCB is a double-sided gold PCB with lower internal resistance and better electrical conductivity\u003c\/span\u003e\u003c\/p\u003e\n\n\u003cp style=\"color: #000000;font-size: 14.444445px;line-height: 23.333334px;\"\u003e\u003cspan style=\"font-size: 24.0px;\"\u003eadopt\u003cstrong\u003e\u003cspan style=\"color: #ff0000;\"\u003eImported Italian AV\u003c\/span\u003e\u003c\/strong\u003eFilm capacitors, the effect is better than yellow ordinary imports and Swedish RIFA industrial capacitors, thick copper wire common-mode inductors, high-power connectors! 2A current capacity, used with decoders, soft sound, obvious improvement resolution, clean background\u003c\/span\u003e\u003c\/p\u003e\n\n\u003cp style=\"color: #000000;font-size: 14.444445px;line-height: 23.333334px;\"\u003e \u003c\/p\u003e\n\n\u003cp style=\"color: #000000;font-size: 14.444445px;line-height: 23.333334px;\"\u003e\u003cspan style=\"font-size: 24.0px;\"\u003e4A and 18A are suitable for power amplifiers and other power-hungry devices\u003c\/span\u003e\u003c\/p\u003e\n\n\u003cp style=\"color: #000000;font-size: 14.444445px;line-height: 23.333334px;\"\u003e \u003c\/p\u003e\n\n\u003cp style=\"color: #000000;font-size: 14.444445px;line-height: 23.333334px;\"\u003e\u003cspan style=\"color: #990000;\"\u003e\u003cspan style=\"font-size: 18.0px;\"\u003e\u003cspan style=\"font-family: microsoft yahei;\"\u003e3-Wire plug as input: connect AC GND AC separately\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\n\u003cp style=\"color: #000000;font-size: 14.444445px;line-height: 23.333334px;\"\u003e\u003cspan style=\"color: #990000;\"\u003e\u003cspan style=\"font-size: 18.0px;\"\u003e\u003cspan style=\"font-family: microsoft yahei;\"\u003e2-Wire plug for output 220V\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\n\u003cp style=\"color: #000000;font-size: 14.444445px;line-height: 23.333334px;\"\u003e\u003cspan style=\"color: #ff0000;\"\u003e\u003cspan style=\"font-size: 24.0px;\"\u003e\u003cspan style=\"font-family: microsoft yahei;\"\u003eLink directly at 220V with transformer. Sound details are clean! Parts need to be welded by hand!!\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\n\u003cp style=\"color: #000000;font-size: 14.444445px;line-height: 23.333334px;\"\u003ePCB size: 32X63MM\u003c\/p\u003e\n\n\u003cp style=\"color: #000000;font-size: 14.444445px;line-height: 23.333334px;\"\u003eWeight: about 24g\u003c\/p\u003e\n\n\u003cp style=\"color: #000000;font-size: 14.444445px;line-height: 23.333334px;\"\u003e\u003cspan style=\"font-size: 24.0px;\"\u003e\u003cspan style=\"color: #ff0000;\"\u003e\u003cstrong\u003eYes.\u003cspan style=\"color: #0000ff;\"\u003e2A\u003c\/span\u003eKit and\u003cspan style=\"color: #0000ff;\"\u003e4A\u003c\/span\u003eKit optional, 2A for headphones, front stage, DAC. 4A 18A for power amplifier\u003c\/strong\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\n\u003cp style=\"color: #000000;font-size: 14.444445px;line-height: 23.333334px;\"\u003e\u003cstrong\u003e\u003cspan style=\"font-size: 24.0px;\"\u003e4A oxygen-free copper filter common mode inductor\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp style=\"color: #000000;font-size: 14.444445px;line-height: 23.333334px;\"\u003e\u003c\/p\u003e\u003cdiv\u003e\u003cimg align=\"absmiddle\" referrerpolicy=\"no-referrer\" src=\"https:\/\/img.alicdn.com\/imgextra\/i1\/88221699\/TB2E8lbgVXXXXXWXpXXXXXXXXXX_!!88221699.jpg\"\u003e\u003c\/div\u003e\n\n\u003cp style=\"color: #000000;font-size: 14.444445px;line-height: 23.333334px;\"\u003e \u003c\/p\u003e\n\n\u003cp style=\"color: #000000;font-size: 14.444445px;line-height: 23.333334px;\"\u003e,\u003c\/p\u003e\u003cdiv\u003e\u003cimg align=\"absmiddle\" referrerpolicy=\"no-referrer\" src=\"https:\/\/img.alicdn.com\/imgextra\/i4\/88221699\/TB2qStwgVXXXXXFXXXXXXXXXXXX_!!88221699.jpg\"\u003e\u003c\/div\u003e\n\n\u003cp style=\"color: #000000;font-size: 14.444445px;line-height: 23.333334px;\"\u003e\u003c\/p\u003e\u003cdiv\u003e\u003cimg align=\"absmiddle\" referrerpolicy=\"no-referrer\" src=\"https:\/\/img.alicdn.com\/imgextra\/i2\/88221699\/TB2qSc7gFXXXXaPXpXXXXXXXXXX_!!88221699.jpg\"\u003e\u003c\/div\u003e\n\n\u003cp style=\"color: #000000;font-size: 14.444445px;line-height: 23.333334px;\"\u003e\u003c\/p\u003e\u003cdiv\u003e\u003cimg align=\"absmiddle\" referrerpolicy=\"no-referrer\" src=\"https:\/\/img.alicdn.com\/imgextra\/i3\/88221699\/TB2u_pXgVXXXXaHXpXXXXXXXXXX_!!88221699.jpg\"\u003e\u003c\/div\u003e\n\n\u003cp style=\"color: #000000;font-size: 14.444445px;line-height: 23.333334px;\"\u003e \u003c\/p\u003e\n\n\u003cp style=\"color: #000000;font-size: 14.444445px;line-height: 23.333334px;\"\u003e\u003cspan style=\"font-size: 24.0px;\"\u003e\u003cstrong\u003e\u003cspan style=\"color: #ff0000;\"\u003e18A is suitable for high-power power amplifiers, Class A, etc., with ultra-low internal resistance. Even a 100W power amplifier is very beneficial. The picture below is 18A.\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\n\u003cp style=\"color: #000000;font-size: 14.444445px;line-height: 23.333334px;\"\u003e\u003c\/p\u003e\u003cdiv\u003e\u003cimg align=\"absmiddle\" referrerpolicy=\"no-referrer\" src=\"https:\/\/img.alicdn.com\/imgextra\/i1\/88221699\/TB2ozPRXam5V1BjSszfXXXjxXXa_!!88221699.jpg\" style=\"max-width: 750.0px;\"\u003e\u003c\/div\u003e\n\n\u003cp style=\"color: #000000;font-size: 14.444445px;line-height: 23.333334px;\"\u003e\u003cspan style=\"color: #ff0000;\"\u003e\u003cstrong\u003e\u003cspan style=\"font-size: 36.0px;\"\u003eItalian AV safety filter capacitor, the effect is better than the general French Thomson, Swiss RIFA, and the high frequency built-in is lower.\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cdiv\u003e\u003cimg align=\"absmiddle\" referrerpolicy=\"no-referrer\" src=\"https:\/\/img.alicdn.com\/imgextra\/i4\/88221699\/TB2wvVfgVXXXXXoXpXXXXXXXXXX_!!88221699.jpg\" style=\"font-size: 14.444445px;line-height: 23.333334px;\"\u003e\u003c\/div\u003e\n\n\u003cp style=\"color: #000000;font-size: 14.444445px;line-height: 23.333334px;\"\u003e \u003c\/p\u003e\n\n\u003cp style=\"color: #000000;font-size: 14.444445px;line-height: 23.333334px;\"\u003e \u003c\/p\u003e\n\n\u003cp style=\"margin-top: 1.12em;margin-bottom: 1.12em;color: #000000;line-height: 19.0909px;\"\u003e\u003cspan style=\"font-family: kaiti_gb2312;\"\u003e\u003cspan style=\"font-size: 24.0px;\"\u003eIntroduction: With the development of electronic technology, high-power electrical appliances, switching power supplies, and other high-frequency electromagnetic interference problems have become extremely difficult problems in circuit interference. They interfere with each other and self-interfere, causing power supplies to be polluted by high-frequency EMI, causing equipment to operate unstably, and restarting frequently.\u003cspan style=\"line-height: 40.0px;\"\u003eIn this context,\u003c\/span\u003e\u003cspan style=\"line-height: 40.0px;\"\u003eEMI filters have been designed to greatly improve this situation.\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\n\u003cp style=\"margin-top: 1.12em;margin-bottom: 1.12em;color: #000000;line-height: 19.0909px;\"\u003e\u003cspan style=\"font-family: kaiti_gb2312;\"\u003e\u003cspan style=\"font-size: 24.0px;\"\u003eSubject:\u003c\/span\u003e\u003c\/span\u003e\u003cspan style=\"font-family: kaiti_gb2312;font-size: 24.0px;line-height: 1.5;\"\u003eFor high-frequency electromagnetic interference (EMI), there are usually three techniques for power filtering to suppress interference noise. In practical use, two or even multiple techniques are often mixed. They are:\u003c\/span\u003e\u003c\/p\u003e\n\n\u003cp style=\"margin-top: 1.12em;margin-bottom: 1.12em;color: #000000;line-height: 19.0909px;\"\u003e \u003c\/p\u003e\n\n\u003cp style=\"margin-top: 1.12em;margin-bottom: 1.12em;color: #000000;line-height: 19.0909px;\"\u003e\u003cspan style=\"font-size: 24.0px;\"\u003e\u003cspan style=\"font-family: kaiti_gb2312;\"\u003e1. Add a capacitor between the zero wires of the power supply fire, that is, the X capacitor.\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\n\u003cp style=\"margin-top: 1.12em;margin-bottom: 1.12em;color: #000000;line-height: 19.0909px;\"\u003e \u003c\/p\u003e\n\n\u003cp style=\"margin-top: 1.12em;margin-bottom: 1.12em;color: #000000;line-height: 19.0909px;\"\u003e\u003cspan style=\"font-size: 24.0px;\"\u003e\u003cspan style=\"font-family: kaiti_gb2312;\"\u003e2. Add a capacitor between each power line and the ground line, that is, a Y capacitor.\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\n\u003cp style=\"margin-top: 1.12em;margin-bottom: 1.12em;color: #000000;line-height: 19.0909px;\"\u003e \u003c\/p\u003e\n\n\u003cp style=\"margin-top: 1.12em;margin-bottom: 1.12em;color: #000000;line-height: 19.0909px;\"\u003e\u003cspan style=\"font-size: 24.0px;\"\u003e\u003cspan style=\"font-family: kaiti_gb2312;\"\u003e3. Common mode rejection (suppression coils on two power lines).\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\n\u003cp style=\"margin-top: 1.12em;margin-bottom: 1.12em;color: #000000;line-height: 19.0909px;\"\u003e \u003c\/p\u003e\n\n\u003cp style=\"margin-top: 1.12em;margin-bottom: 1.12em;color: #000000;line-height: 19.0909px;\"\u003e\u003cspan style=\"font-size: 24.0px;\"\u003e\u003cspan style=\"font-family: kaiti_gb2312;\"\u003eThis one is designed by our store.\u003cspan style=\"line-height: 40.0px;\"\u003eEMI filter,\u003cspan style=\"color: #0000ff;\"\u003e\u003cspan style=\"font-size: 36.0px;\"\u003eIt's a combination of these three technologies.\u003c\/span\u003e,\u003c\/span\u003eIt allows low-frequency useful signals to pass smoothly, while suppressing high-frequency interference.\u003c\/span\u003e\u003cspan style=\"line-height: 27.0px;\"\u003eAlthough the current is not large, only 2A (400W)\/4A (800W), it is only suitable for equipment with small operating current, but with extremely high power requirements, such as low-power front stage, desktop CD, DAC decoder camera and other equipment input AC power purification. It can suppress power grid noise and high-order harmonics and noise and high-frequency harmonics generated by switching power supplies, motors, etc. Improve the purity of audio sound quality and reduce the noise generated by AC power interference.\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\n\u003cp style=\"margin-top: 1.12em;margin-bottom: 1.12em;color: #000000;line-height: 19.0909px;\"\u003e\u003cfont color=\"#000000\" style=\"font-size: large;line-height: 27.0px;\"\u003e\u003cspan style=\"font-size: 24.0px;\"\u003e\u003cspan style=\"font-family: kaiti_gb2312;\"\u003e\u003cstrong style=\"line-height: 40.0px;\"\u003eInstallation location:\u003c\/strong\u003e\u003cspan style=\"color: #333333;line-height: 24.0px;text-indent: 28.0px;\"\u003ePower cords are the main way to interfere with incoming and outgoing devices. Through power cords, interference from the power grid can enter the device and interfere with the normal operation of the device. Similarly, the interference generated by the device may also be transmitted to the power grid through the power cord, interfering with the normal operation of other devices. Therefore,\u003cspan style=\"color: #0000ff;\"\u003eThe ideal installation location is the power socket of the device, such as before the audio equipment transformer, before switching the power supply, and the power port on the back of the monitor.\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/font\u003e\u003c\/p\u003e\n\n\u003cp\u003e \u003c\/p\u003e\n\n\u003cp\u003e \u003c\/p\u003e\n","brand":"GoMakerHive: Ignite Your Spark into a Blaze.","offers":[{"title":"2A EMI kit requires soldering","offer_id":66690481979696,"sku":"3211952773967","price":21.16,"currency_code":"USD","in_stock":true},{"title":"4A EMI kit requires soldering","offer_id":66690482012464,"sku":"3211952773966","price":21.67,"currency_code":"USD","in_stock":true},{"title":"18A EMI kit requires soldering","offer_id":66690482045232,"sku":"3211952773968","price":22.05,"currency_code":"USD","in_stock":true},{"title":"4A EMI finished board","offer_id":66690482078000,"sku":"3564492695690","price":22.05,"currency_code":"USD","in_stock":true},{"title":"18A EMI finished board","offer_id":66690482110768,"sku":"3564492695689","price":22.45,"currency_code":"USD","in_stock":true},{"title":"2A EMI finished board","offer_id":66690482143536,"sku":"4265943837596","price":21.76,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0972\/2367\/2112\/files\/O1CN01mIw0Yh1OQBd10zhvT__0-item_pic.webp?v=1777259583","url":"https:\/\/gomakerhive.com\/products\/power-filter-board-4a-emi-filter-sound-booster-filter-socket-double-sided-immersion-gold-pcb","provider":"GoMakerHive: Ignite Your Spark into a Blaze.","version":"1.0","type":"link"}