Which fuse do I use for this radio? Shawn December 21, 2016 22:10 A 15 amp fuse should be used with both the 955 & 655. Related articles Where I can get another mounting bracket for my radio? Can I power the 655 with a cigarette lighter adapter? Will 8 gauge automotive wire soldered to the regular 12 gauge power cord hurt the radio? How many amps does the SR-955HPC radio draw? Why does the radio's meter show less power output than my external watt meter? Comments 0 comments Article is closed for comments.