I have just had a guitar delivered from a well know dealer.It's an Eastman E20 OM in sunburst.Before dispatch I was told it didn't need a set up (the shop offers one free).I have to say ,I was quite underwhelmed with the projection and volume of the guitar.When I fretted the top E string the first three frets were were clear but not loud (playing with my nails not a pick).When I got to the 4th fret the note sang out loudly and sustained .It sounded as though there was another string vibrating, ie not just one clear note.Is that an overtone ,and is that scenario describing a wolf note? How common is this.I have a little martin LX1E guitar which is perfectly balanced across all the strings and frets.Were I to play a passage that involved chromatic movement up from the first fret ,this note would have been obviously louder and of a different tone.What am I describing? Anyway, I have sent the guitar back as it wasn't what I was expecting.Should this have been picked up by the shop? Is it a common problem? Lesson learned, never buy online, only buy what you've tried out.I'm in the process of moving form classical guitar playing and its not something I've come across in the past.Thanks in advance for any replies.