Metra 40-GM30 GM 88-13 FM Modulator Adapters

1. Wireless FM (sometimes called an RF (radio frequency) Modulator: Transmits signal over FM Frequency once tuned in. Not great sound but easy to install
   • Pros: Easy to Install
   • Cons: Not Great sound, Static over-line, Noisy Weak Signal (not recommended for Satellite - due to noise issues.)

   Better Solution: (Use Antenna Adapter Set: Which allows direct FM Wiring)

2. Wired FM Modulator: A wired FM modulator offers improved performance, since it plugs into the antenna input of the stereo
• These cables allow for the direct connection when adding a FM-Modulated CD Changer, Satellite Tuner, Video, DVD to existing systems.
• Pros: Wired Directly, Clean Sound, Strong Signal, Professional Choice

Installing wired FM modulators

• To install a wired FM modulator, first find a good mounting location.

• Keep in mind that you will need to access your factory radio through its antenna input, as well as connect the peripheral source to the modulator.

• Best location usually is behind an interior panel or in the cavity behind the stereo.

• Plug the vehicle's antenna cable into the antenna input on the FM modulator. (Sold Separately) Click for Modulation Box

• Next, run the output of the modulator to your stereo's antenna input (READ BELOW)

• (Certain vehicles require antenna adapters - part being sold -

• If your vehicles make model and year is listed in title you'll need the antenna adapter set)

• Install your new component and make all of the audio connections at the FM modulator.

• Determine which of the available modulation frequencies is least likely to be shared by a strong local radio signal and set it on the hideaway box before you mount the unit