I got this b-stock Brubaker Brute MJX-5 this past weekend. It does have its problems, but I bought it for a bargain, so I have no complaints. One of the more serious problems that it has is this thud that B string makes when played on higher frets. It does resonate and a pitch is discernible, although to a lesser extent compared to the other strings. Mostly there is this almost percussive sound that can be achieved normally by playing near the bridge. E string have the same problem, except the thud is almost inaudible. Can anyone point out what the problem is? Thanks.