Ann, do you plan to use these speakers while the vehicle is moving? If so, why not just use a car kit similar to those sold and used with portable CD players. Of course, you may not have cassette capability in that vehicle, but I used one of those cassette car kits to run a wire from the quasi-cassette to my book port. It takes nothing at all to have the Book Port playing nicely through my car audio speakers. If you no longer have a car unit that includes cassette capabilities, you might consider connecting the Book Port to one of those small FM transmitters that would send its signal into your car radio. Again, you'd have the extreme advantage of well amplified car audio to drown out the noise. Nolan