So, instead of paying 100$++ for a GROM Auxiliary iPod adapter, i'd prefer to buy a FM iPod music transmitter. So wich FM transmitter, in your opinion, has the better sound quality in a mazda 3 2006 ? thank you !
Any FM transmitter is gonna have noise in it, the radio stations are gonna interfere, etc... If sound quality is what you are looking for, go with the real auxiliary input for your specific vehicle. If you insist on getting an FM transmitter, you get what you pay for. The more it costs, the better features and quality it will have.