ok I have been corected...so which is better ac or dc for the shield? longevity?greasemonkey said:They run on both A.C. and D.C.
Those cig. to R.C.A. adapters don't always work right. Had one on my Yamaha and it kept popping out of the cig. lighter.
Put a R.C.A. jack in and you will be a lot better off in the long run.
Been there, done that.