This is the "other" consumer audio plug
type, the "larger" kind. This kind you see on most "higher-end
" equipment; for example, most stereo
s use it for headphone
-out, and some of the slightly more professional
equipment uses it for connecting. For example, it's the kind you plug into an electric guitar
Outside of the U.S. you would probably see "6.35 mm" in the name in place of "1/4 inch".