Darryl - Assuming you are talking about a vintage DeArmond on an archtop, give it a try and see what you think. My wife has a '48 Epi Broadway w flats and through her DeArmond it sounds great (rich and dark) plugged in, which is how she usually plays it. I have a '46 Epi Triumph that I frequently play unplugged and only put the DeArmond (1100) on it for gigs, so I prefer roundwounds (nickel only). They are a little brighter and give a punchier and better defined note from the wound strings. To me the flats also give a more 'modern' tone and for acoustic playing the flats sound kind of flubby and ill-defined. My take (for what it's worth) is flats for electric, rounds for either. It can't hurt to try something different and see what you think. Trust your ear.