Mine sounds remarkably similar. My 34" gong rings to a fairly accurate "E" note.
I gotta say, I was very happy with my Gongs Unlimited purchase. Pretty fast shipping. It came with an OK mallet, (I wrapped it with a washcloth and it sounds more pleasing) the hanging rope, and the gong holes were champhered to make a nice smooth bearing edge for the hanging rope. The gope lol.
743 to my door. Now I'm waiting on some friction mallets. I am really digging this