I bought the FM transmitter thing from Griffin - it sounded like crap no matter where I placed the ipod or which frequency I tuned the ipod/radio to.
I got desperate on one of the longer drives and had to power the device using a power adapter and to my surprise the sound quality was much better. It seems that the adapter lead acts as an antenna - it works even if it is not plugged into the 12v supply.
Further tip - use the iGo adapter as just by swapping the tip you can charge a phone/computer/gps/radar thingy/ipod and they take up next to no space - the tips are about the size of a thumbnail - no fiddly switches - brilliant design.
I got desperate on one of the longer drives and had to power the device using a power adapter and to my surprise the sound quality was much better. It seems that the adapter lead acts as an antenna - it works even if it is not plugged into the 12v supply.
Further tip - use the iGo adapter as just by swapping the tip you can charge a phone/computer/gps/radar thingy/ipod and they take up next to no space - the tips are about the size of a thumbnail - no fiddly switches - brilliant design.