--- title: What is impedance? description: "Passive Speakers help: What is impedance. Official Fluance support." --- [Skip to content](https://support.fluance.com/s/article/what-is-impedance#main-content) [![Fluance Logo White](https://support.fluance.com/hs-fs/hubfs/Fluance%20Logo%20White.png?width=189&height=25&name=Fluance%20Logo%20White.png)](https://www.fluance.com/) - TURNTABLES Show submenu for TURNTABLES - [Turntables](https://www.fluance.com/tt/turntables) - [Turntable Speaker Systems](https://www.fluance.com/tt/turntable-speaker-systems) - [Turntable Accesories](https://www.fluance.com/tt/turntable-accessories) - [POWERED SPEAKERS](https://www.fluance.com/powered-bookshelf-floorstanding-speakers) - HOME AUDIO Show submenu for HOME AUDIO - [Home Theater Systems](https://www.fluance.com/home-audio/home-theater-systems) - [Floorstanding](https://www.fluance.com/home-audio/floorstanding-speakers) - [Bookshelf, Surround & Bipolar](https://www.fluance.com/home-audio/bookshelf-surround-bipolar-speakers) - [Center Channel](https://www.fluance.com/home-audio/center-channel-speaker) - [Subwoofers](https://www.fluance.com/home-audio/subwoofer) - [Accessories](https://www.fluance.com/home-audio/accessories) - [OUR STORY](https://www.fluance.com/about) - [BLOG](https://www.fluance.com/blog) Open main navigation Close main navigation - TURNTABLES Show submenu for TURNTABLES - [Turntables](https://www.fluance.com/tt/turntables) - [Turntable Speaker Systems](https://www.fluance.com/tt/turntable-speaker-systems) - [Turntable Accesories](https://www.fluance.com/tt/turntable-accessories) - [POWERED SPEAKERS](https://www.fluance.com/powered-bookshelf-floorstanding-speakers) - HOME AUDIO Show submenu for HOME AUDIO - [Home Theater Systems](https://www.fluance.com/home-audio/home-theater-systems) - [Floorstanding](https://www.fluance.com/home-audio/floorstanding-speakers) - [Bookshelf, Surround & Bipolar](https://www.fluance.com/home-audio/bookshelf-surround-bipolar-speakers) - [Center Channel](https://www.fluance.com/home-audio/center-channel-speaker) - [Subwoofers](https://www.fluance.com/home-audio/subwoofer) - [Accessories](https://www.fluance.com/home-audio/accessories) - [OUR STORY](https://www.fluance.com/about) - [BLOG](https://www.fluance.com/blog) - - [Contact Us](https://support.fluance.com/s/kb-tickets/new) [Contact Us](https://support.fluance.com/s/kb-tickets/new?hsLang=en) YOUR GUIDE TO THE ULTIMATE AUDIO EXPERIENCE - There are no suggestions because the search field is empty. 1. [Fluance Support Center](https://support.fluance.com/s?hsLang=en) 2. [Passive Speakers](https://support.fluance.com/s/passive-speakers?hsLang=en) 3. [Home Theater Set Up](https://support.fluance.com/s/passive-speakers?hsLang=en#home-theater-set-up) # What is impedance? Impedance is a speaker’s opposition to alternating current, measured in ohms (Ω). In general, lower-impedance speakers draw more current from the amplifier, which can make them more demanding to drive. If an amplifier is not designed to handle that load, it may run hotter, distort, or enter protection mode to prevent damage. This is why amplifier and receiver specifications often list different power ratings for 4, 6, and 8 ohm loads. In many cases, the 4 ohm rating is higher because the amplifier can deliver more power into a lower-impedance load — but only if it is designed to operate safely at 4 ohms. 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