How Does a FM Modulator Work?

Written by tim mcquade
  • Share
  • Tweet
  • Share
  • Pin
  • Email
How Does a FM Modulator Work?
FM Modulators can be easily installed and are a great way to listen to music in your car. (convertible car interior image by Christopher Dodge from

An FM modulator allows you to be able to hook up an auxiliary device (such as an iPod or satellite radio receiver) through a car's regular radio channels. FM modulators come in many shapes and sizes and have a wide price range.

Other People Are Reading


FM modulators come in two forms: wireless and hard-wired. A wireless FM modulator (also referred to as an FM Transmitter) plugs a listening device straight into your car's cigarette lighter socket. The wireless FM modulator then broadcasts a weak, low-range signal so your car's radio can pick it up and play it. A hard-wired FM modulator is connected via wires directly to your car's antenna unit, creating a solid connection for the listening device.

Pros and Cons

The wireless and hard-wired FM modulators have pros and cons. For instance, a wireless FM modulator is far cheaper but it has a weak connection to the radio and poor sound quality results from outside radio interference. A hard-wired FM modulator will have a clean signal almost all the time; however, it costs more because (to ensure proper installation quality) it must be professionally installed.


An FM modulator is a beneficial tool. No longer do you need CDs or cassettes in your car. In fact, you never have to listen to the radio anymore. You can simply plug your iPod or other listening device straight into your car's cigarette lighter socket and play your own music. Of course, depending on how much you are willing to spend determines the sound quality an FM modulator will provide.

Don't Miss

  • All types
  • Articles
  • Slideshows
  • Videos
  • Most relevant
  • Most popular
  • Most recent

No articles available

No slideshows available

No videos available

By using the site, you consent to the use of cookies. For more information, please see our Cookie policy.