so i get the 1001rb-II today, which by the way is the sexiest inanimate object i've ever owned. anyway, i plug into the avatar 410 which came last week, crank up the gk to 9oclock and begin working the strings. i couldn't believe how smooth everything sounded. i push up to 11oclock to get some thump out of it, and yep, the bottom left speaker is giving off a buzz. i get a flashlight on the cones, but can't find any physical damage. the glue around the dustcaps look good too. but i'm 95% positive it's the bottom left. i called dave at avatar, but they were already closed. hopefully tomorrow we can work something out.