{"id":5966,"date":"2025-01-30T14:35:29","date_gmt":"2025-01-30T14:35:29","guid":{"rendered":"https:\/\/technolabelectronics.com\/?post_type=product&#038;p=5966"},"modified":"2026-05-03T20:01:38","modified_gmt":"2026-05-03T20:01:38","slug":"4-ohm-3-watt-speaker-40mm-diameter-with-external-magnet","status":"publish","type":"product","link":"https:\/\/technolabelectronics.com\/?product=4-ohm-3-watt-speaker-40mm-diameter-with-external-magnet","title":{"rendered":"4 Ohm 3 Watt Speaker &#8211; 40mm Diameter with External Magnet"},"content":{"rendered":"<p>Enhance your audio projects with this 4 Ohm 3-Watt Speaker (40mm Diameter), designed for optimal sound output in compact spaces. This high-efficiency speaker provides a balanced frequency response and excellent high-range performance, making it ideal for various DIY and professional applications. Whether you\u2019re working on warning alarms, amplifier circuits, music systems, or robotics, this speaker ensures clear and crisp sound reproduction.<\/p>\n<p>Built with an external magnet, this speaker efficiently converts electromagnetic energy into rich and clear sound waves. It can receive both analog and digital inputs from microcontrollers, computers, and audio players. Its compact design makes it highly versatile for space-constrained projects, while its robust build ensures durability and long-lasting performance.<\/p>\n<p>This speaker is compatible with Arduino, NodeMCU, Raspberry Pi, and other development boards, making it an excellent choice for electronics enthusiasts and developers.<\/p>\n<h2>Features:<\/h2>\n<ul>\n<li><strong>High-Quality Sound Output<\/strong> \u2013 Balanced frequency response with good high-range performance<\/li>\n<li><strong>Compact &amp; Lightweight<\/strong> \u2013 Ideal for space-limited projects<\/li>\n<li><strong>External Magnet Design<\/strong> \u2013 Ensures efficient electromagnetic energy conversion<\/li>\n<li><strong>Versatile Applications<\/strong> \u2013 Suitable for alarms, amplifiers, TVs, music systems, and robotics<\/li>\n<li><strong>Easy Integration<\/strong> \u2013 Works seamlessly with microcontrollers like Arduino, Raspberry Pi, and more<\/li>\n<li><strong>Durable Build<\/strong> \u2013 Reliable and long-lasting performance<\/li>\n<\/ul>\n<h2>Specifications:<\/h2>\n<ul>\n<li><strong>Power Rating:<\/strong> 3W<\/li>\n<li><strong>Impedance:<\/strong> 4 Ohm<\/li>\n<li><strong>Sound Pressure Level:<\/strong> 94 \u00b1 3 dB<\/li>\n<li><strong>Sensitivity:<\/strong> 100 dB\/W<\/li>\n<li><strong>Diameter:<\/strong> 40mm<\/li>\n<li><strong>Height:<\/strong> 20.6mm<\/li>\n<li><strong>Country of Origin:<\/strong> China<\/li>\n<\/ul>\n<h2>Applications:<\/h2>\n<ul>\n<li>DIY Electronics &amp; Audio Projects<\/li>\n<li>General Warning Alarm Systems<\/li>\n<li>Simple Amplifier Circuits<\/li>\n<li>TV &amp; Music Systems<\/li>\n<li>Robotics &amp; Embedded Systems<\/li>\n<li>Microcontroller-Based Audio Projects (Arduino, Raspberry Pi, ESP32, etc.)<\/li>\n<\/ul>\n<h2>Package Includes:<\/h2>\n<p>1 x 4 Ohm 3W Speaker &#8211; 40mm Diameter with External Magnet<\/p>\n<p>This compact yet powerful speaker is an essential component for anyone looking to build high-quality audio circuits. Order now and take your projects to the next level!<\/p>\n","protected":false},"excerpt":{"rendered":"<p><strong>Power Rating:<\/strong> 3W<br \/>\n<strong>Impedance:<\/strong> 4 Ohm<br \/>\n<strong>Sound Pressure Level:<\/strong> 94 \u00b1 3 dB<br \/>\n<strong>Sensitivity:<\/strong> 100 dB\/W<br \/>\n<strong>Diameter:<\/strong> 40mm<br \/>\n<strong>Height:<\/strong> 20.6mm<br \/>\n<strong>Country of Origin:<\/strong> China<\/p>\n","protected":false},"featured_media":5974,"comment_status":"open","ping_status":"closed","template":"","meta":{"_acf_changed":false},"product_brand":[],"product_cat":[403],"product_tag":[561,605,606,604,612,608,344,609,607,613,611,610],"class_list":{"0":"post-5966","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-audio","7":"product_tag-arduinocompatible","8":"product_tag-3wspeaker","9":"product_tag-40mmaudiodriver","10":"product_tag-4ohmspeaker","11":"product_tag-compactspeakerdesign","12":"product_tag-diyaudioprojects","13":"product_tag-diyelectronics","14":"product_tag-electronicsenthusiasts","15":"product_tag-externalmagnetspeaker","16":"product_tag-highefficiencyaudio","17":"product_tag-microcontrollerprojects","18":"product_tag-raspberrypiaudio","20":"first","21":"outofstock","22":"sale","23":"taxable","24":"shipping-taxable","25":"purchasable","26":"product-type-simple"},"acf":[],"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/technolabelectronics.com\/index.php?rest_route=\/wp\/v2\/product\/5966","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/technolabelectronics.com\/index.php?rest_route=\/wp\/v2\/product"}],"about":[{"href":"https:\/\/technolabelectronics.com\/index.php?rest_route=\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"https:\/\/technolabelectronics.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=5966"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/technolabelectronics.com\/index.php?rest_route=\/wp\/v2\/media\/5974"}],"wp:attachment":[{"href":"https:\/\/technolabelectronics.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=5966"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/technolabelectronics.com\/index.php?rest_route=%2Fwp%2Fv2%2Fproduct_brand&post=5966"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/technolabelectronics.com\/index.php?rest_route=%2Fwp%2Fv2%2Fproduct_cat&post=5966"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/technolabelectronics.com\/index.php?rest_route=%2Fwp%2Fv2%2Fproduct_tag&post=5966"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}