Oh, I never had that spelled out for me, they just said on Antiques Roadshow that Gibson stopped using solid tops and went to composite for electrified acoustics (in the mid-fifties, it's a 160E ), because composite doesn't resonate as well, so it doesn't feed back as much. . There's plywood Gibsons too, who knew? LOL . /5 #Guitar #Framus12StringProject . (apparently the courier has picked the 12 string up from the vendor, if I'm reading the tracking right, which, probably not.)