So you just got a new satellite radio and it sounds awful? Way back in the last decade, satellite radios were able to push out a solid watt (or more) of FM signals. The problem was it pushed the signal not just to the radio in your car, but in others that were riding alongside you. The FCC didn’t like that and severely limited the amount of power the internal FM transmitters could push out. Unfortunately in many cases, it’s insufficient and a lot of people return their cool Sirius or XM radios because the old car radio sounded so much better.
Fortunately there are solutions. Using the headphone jack on your satellite radio, there are aftermarket FM transmitters that will boost your signal significantly right up to what it used to be several years ago. Many run off a DC power source, some run off a AA battery. Just be sure to turn off the satellite radio’s FM transmitter when using these aftermarket devices to avoid a duplicate signal.
Also worth noting, if you only have a single power source in your car, consider the purchase of a handy DC splitter for your car.