{"id":31340,"date":"2007-04-13T00:00:00","date_gmt":"2007-04-13T00:00:00","guid":{"rendered":"http:\/\/www.sweetwater.com\/sweetcare\/?p=31340"},"modified":"2025-05-26T14:42:28","modified_gmt":"2025-05-26T18:42:28","slug":"what-phantom-power-need","status":"publish","type":"articles","link":"https:\/\/www.sweetwater.com\/sweetcare\/articles\/what-phantom-power-need\/","title":{"rendered":"What is Phantom Power and why do I need it?"},"content":{"rendered":"\n<h2 id=\"Overview\" class=\"wp-block-cgb-block-customheader blackHeader alignLeft noUnderline customh2 swheader\">Overview<\/h2>\n\n\n\n<p>In this article, we will discuss what phantom power is, why you need it, and answer some commonly asked questions. Follow the sections below to get started.<\/p>\n\n\n\n<ol><li><a href=\"#What-is-phantom-power\"><strong>What is phantom power?<\/strong><\/a><\/li><li><a href=\"#Why-do-I-need-phantom-power\"><strong>Why do I need phantom power?<\/strong><\/a><\/li><li><strong><a href=\"#Phantom-power-FAQ\">Phantom power FAQ<\/a><\/strong><\/li><\/ol>\n\n\n\n<h2 id=\"What-is-phantom-power\" class=\"wp-block-cgb-block-customheader blackHeader alignLeft noUnderline customh2 swheader\">What is phantom power?<\/h2>\n\n\n\n<p>To know what phantom power is, you need to understand how condenser microphones work. Condensers work on the principle of variable capacitance. In Britain, they are actually called \u201ccapacitor microphones.\u201d Sound waves vibrate a diaphragm (usually gold-sputtered mylar) that is stretched in front of a metal plate (called the backplate). As the diaphragm vibrates, the distance between the diaphragm and the backplate changes, which changes the capacitance.<\/p>\n\n\n\n<blockquote class=\"wp-block-quote\"><p class=\"\">Those&nbsp;tiny electrical variations&nbsp;which&nbsp;must be amplified before they leave the mic&nbsp;so there\u2019s an internal preamp inside the mic. The phantom power provides the voltage to charge the diaphragm and also powers the preamp inside the mic.<\/p><\/blockquote>\n\n\n\n<p>This amplification method is what\u2019s known as phantom power.&nbsp;<\/p>\n\n\n\n<figure class=\"wp-block-embed is-type-video is-provider-youtube wp-block-embed-youtube wp-embed-aspect-16-9 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<iframe loading=\"lazy\" title=\"What is Phantom Power?\" width=\"620\" height=\"349\" src=\"https:\/\/www.youtube.com\/embed\/gGG1y43ct6Y?wmode=transparent&amp;rel=0&amp;feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe>\n<\/div><\/figure>\n\n\n\n<p class=\"has-text-align-right\"><a href=\"#\" target=\"_blank\" class=\"button flat s blue\">Return to top<\/a><\/p>\n\n\n\n<div style=\"height:20px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<hr class=\"wp-block-separator\"\/>\n\n\n\n<div style=\"height:20px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h2 id=\"Why-do-I-need-phantom-power\" class=\"wp-block-cgb-block-customheader blackHeader alignLeft noUnderline customh2 swheader\">Why do I need phantom power?<\/h2>\n\n\n\n<p>Phantom power, commonly designated as <em>+48V<\/em> or <em>P48<\/em>, was designed to power microphones without using bulky external power supplies such as the ones required for tube microphones. It\u2019s a way of sending the DC electrical current required through a balanced XLR cable. We need that voltage to power the diaphragm and the mic\u2019s internal amp. When phantom power is turned on, DC current is sent through the XLR cable and delivers the voltage necessary to power the microphone. It\u2019s most widely used as a power source for condenser microphones, which have <a href=\"https:\/\/www.sweetwater.com\/insync\/active\/\">active<\/a> electronics. In addition, true condenser microphones (as opposed to electret) require a voltage for polarizing the microphone\u2019s transducer element, and phantom power provides a voltage for both of these purposes.&nbsp;<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img src=\"https:\/\/lh4.googleusercontent.com\/-aJ3BF4hjcnm1ur_IToQ3mRdRpe8IQM2xYh1B4UlTC7Qmu9W8BRMM3OFGEIPEfucW1uDT9CXV2lqA1NzEXkgBo3ZyOD-YrX9biJHa_rkYuFafTK0cPbNypjNCTBSNsfiwiMlPH8J\" alt=\"\"\/><\/figure>\n\n\n\n<p class=\"has-text-align-center\"><em>\u201cSignal flow\u201d of phantom power<\/em><\/p>\n\n\n\n<p class=\"has-text-align-right\"><a href=\"#\" target=\"_blank\" class=\"button flat s blue\">Return to top<\/a><\/p>\n\n\n\n<div style=\"height:20px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<hr class=\"wp-block-separator\"\/>\n\n\n\n<div style=\"height:20px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h2 id=\"Phantom-power-FAQ\" class=\"wp-block-cgb-block-customheader blackHeader alignLeft noUnderline customh2 swheader\">Phantom power FAQ<\/h2>\n\n\n\n<p>Now that you know how phantom power is and why it\u2019s required, here are some of the most commonly asked questions we receive about phantom power. We\u2019ve also included some tips and tricks to help get the most out of your phantom powered gear.<\/p>\n\n\n\n<h3 id=\"Do-I-need-phantom-power-for-my-guitar\" class=\"wp-block-cgb-block-customheader darkBlueHeader alignLeft underline customh3 swheader\">Do I need phantom power for my guitar?<\/h3>\n\n\n\n<p>Phantom power is not required for your guitar. However, some <strong>active<\/strong> guitar DI boxes will need it. Refer to the DI box Owners Manual for specific power requirements, however.<\/p>\n\n\n\n<h3 id=\"Why-isn-t-my-condenser-microphone-working-even-with-phantom-power-turned-on\" class=\"wp-block-cgb-block-customheader darkBlueHeader alignLeft underline customh3 swheader\">Why isn&#8217;t my condenser microphone working even with phantom power turned on?<\/h3>\n\n\n\n<p>Besides a potentially bad cable, one reason could be that it isn\u2019t receiving enough power. Some older or inexpensive consoles or interfaces may have Phantom Power buttons, but they supply a lower voltage, less than 48 volts.<\/p>\n\n\n\n<p>While some condenser microphones can operate on voltages as low as 9 volts, providing less than 48 volts may cause sonic degradation and decreased performance. In cases like these, you will need an <a href=\"https:\/\/www.sweetwater.com\/c959--Phantom_Power_Supplies\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\" (opens in a new tab)\">external power supply<\/a>.<\/p>\n\n\n\n<h3 id=\"Can-you-damage-a-ribbon-microphone-with-phantom-power\" class=\"wp-block-cgb-block-customheader darkBlueHeader alignLeft underline customh3 swheader\">Can you damage a ribbon microphone with phantom power?<\/h3>\n\n\n\n<p>This is a hotly debated topic, and the answer is \u201cnot necessarily.\u201d <strong>Active<\/strong> ribbon microphones will require phantom power. However, ribbon microphones should <strong><em>never<\/em><\/strong> be plugged into a preamp with phantom power engaged. There are two ways you can damage a <strong>passive <\/strong>ribbon microphone. Improper wiring of the XLR cable used, and live patching (also known as hot-patching) on a TRS patch bay. Check out <a href=\"https:\/\/royerlabs.com\/ribbon-mics-and-phantom-power\/\" target=\"_blank\" rel=\"noreferrer noopener\">this article<\/a> to learn about the relationship between ribbon mics and phantom power from our friends at Royer Labs.<\/p>\n\n\n\n<h3 id=\"Do-I-need-phantom-power-for-a-dynamic-microphone\" class=\"wp-block-cgb-block-customheader darkBlueHeader alignLeft underline customh3 swheader\">Do I need phantom power for a dynamic microphone?<\/h3>\n\n\n\n<p>Dynamic microphones do not require phantom power. However, there are some very low-output dynamic microphones, such as the Shure SM7B (with an <a href=\"https:\/\/www.shure.com\/en-US\/support\/find-an-answer\/sm7-output-level-and-preamp-gain-specifications\">output level of -69dBV<\/a>). These microphones require a preamp to boost the signal. If you are using an in-line preamp that requires phantom power, then after you connect the microphone to the preamp, you will then need to enable phantom power to run the preamp.&nbsp;<\/p>\n\n\n\n<p class=\"has-text-align-right\"><a href=\"#\" target=\"_blank\" class=\"button flat s blue\">Return to top<\/a><\/p>\n\n\n\n<p>&nbsp;<\/p>\n","protected":false},"featured_media":1750615,"template":"","categories":[142726],"tags":[45207,57988,35143,298875],"storecat":[143077,142761,142775,143115,143146,142927,143195],"itemids":[],"manufacturers":[202712],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v17.9 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<meta name=\"description\" content=\"In this guide, we will discuss what phantom power is, why you need it, and answer some common questions. 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