I could never get good quality with the wireless ones (granted that the FM reception from stations around my area is not good to start with). I am looking into installing a wired FM modulator which hooks right into the antenna plug of the factory stereo. I have a few questions. 1. Any recommended product? Would most $20 units do? 2. I'm not sure how to connect the power supply. How do I locate the 12V wire and connect that to the unit? Couldn't find any previous posts with that info. Thanks.