Hi-Fi Stereo FM Transmitter

[MrForbes]

Originally Posted by Dave Flowerday

And, most importantly, you cannot interfere with any licensed broadcaster in the band. If you cause interference for any of your neighbors who are trying to listen to a licensed station, you are violating federal law. The FCC has been known to crack down on offenders too, so don't just assume that no one will notice and you'll get away with it.

This is the crux of the matter...and whether or not you'll be able to do this depends on how far away your neighbors are. I'm lucky, we live on 4 acres, and the nearest houses are about 500 ft away, so we could probably make an FM transmitter system for our house that would meet the interference requirements, even though it might exceed the allowable field strength. If you're in an apartment or high density housing tract, it might be impossible.