Power ratings are an essential tool when you're shopping for an amplifier or speakers, whether that's for your home or car. With a good match between the two, both can perform to their capabilities, and more importantly, reproduce beautiful music for you to hear. This video gives you some background information on important topics, such as speaker resistance and ohms, and how they affect your choice of amplifier. Also, we'll discuss what can happen if you feed your speakers too much...or too little power. We'll also help demystify power ratings, because how they are determined can make a difference, too. And of course, our Advisors can help you decide what a good match is between amp and speaker if you're having trouble making a choice. Shop for home receivers & amplifiers at Crutchfield: https://www.crutchfield.com/i-rYTVc36U/m_10400/Receivers-Amplifiers.html Shop for car amplifiers at Crutchfield: https://www.crutchfield.com/i-rYTVc36U/m_100/Car-Amplifiers.html Shop for home speakers at Crutchfield: https://www.crutchfield.com/i-rYTVc36U/m_11999/Home-Speakers.html Shop for car speakers at Crutchfield: https://www.crutchfield.com/i-rYTVc36U/m_418550/Car-Speakers-Subs.html Watch our video about matching amps and subs in your car: https://youtu.be/WOpue_WW6-4 *Skip to video section:* 0:00 The right amount of power 0:24 RMS vs peak power 1:42 Speaker power ratings 2:05 Dangers of too much or too little power 2:43 Speaker sensitivity ratings 3:36 Impedance ratings (ohms) 4:50 Amplifier impedance ratings 5:10 How to find high-performance amps 6:12 Car amplifiers 6:43 Car subwoofers 7:05 Getting the most for your money 7:57 How power ratings are determined Crutchfield, America's trusted electronics specialist since 1974, has award-winning customer service, free lifetime tech support, and free shipping on most orders. Shop for all your audio and video needs at Crutchfield.com and sign up for the catalog and email newsletter at http://www.crutchfield.com Read articles, in-depth reviews, how-to guides, and watch videos at https://www.crutchfield.com/Learn/ See more home and car electronics videos on our channel: https://www.youtube.com/user/crutchfieldtv _12 reasons to buy from Crutchfield: https://www.crutchfield.com/about/valueprops.aspx_