what do AC/DC input coupling on old Marantz amp do

I have Marantz SM-1000 amp and SC-9 pre amp.I do not know
which input to use or what is the difference?

joyride3812-11-2002 3:35am

rluthy Details Discussions Posts This discussion Message User 1 posts 02-05-2003 at 03:52pm Copy Comment URL Report Comment Edit Delete Let Me know if you ever decide to sell! Thanks Ronnie