How to Play an iPhone Through a Car Amplifier

By Jared Newman

One of the benefits to the iPhone besides its calling capabilities is its built-in MP3 player and ability to stream Internet music from applications such as Last.fm and Pandora. Playing the iPhone through a car amplifier affords plenty of listening options for your trip.

Things You'll Need

  • Audio sound system with either an auxiliary 1/8-inch jack, a tape deck or an FM radio tuner
  • An 1/8-inch stereo audio cable, a tape cassette adapter or an iPhone FM transmitter

Playing the iPhone Through Auxiliary Input

Step 1

Locate the auxiliary input on your car stereo. Most newer model cars have this type of input in their sound systems.

Step 2

Plug one end of the 1/8-inch stereo audio cable into the auxiliary input and connect the other end to the iPhone's headphone output.

Step 3

Play any form of audio through the iPhone. The sound should come through the car system's speakers.

Playing the iPhone Through a Cassette Deck

Step 1

Insert the tape end of the tape adapter into the car's cassette deck and push the deck's Play button.

Step 2

Insert the 1/8-inch cable end of the tape adapter into the iPhone's headphone output jack.

Step 3

Play any form of audio through the iPhone.

Playing the iPhone Through an FM Transmitter

Step 1

Plug the FM transmitter into the charge jack on the iPhone.

Step 2

Set the car's radio to FM and search for an unoccupied band. Low bands (e.g., 90.1 or less) and high bands (i.e., 107.1 or more) are the more likely to be free.

Step 3

Set the radio band on the FM transmitter to the same one that you selected on the car radio.

Step 4

Play any form of audio through the iPhone as you normally would.