One of my new Carvins (sale) didnt seem to make my "burn in" period. It is scratchy when I push in on the cone (back and forth). I heard a "break up/crackling/floppy" noise once from the speaker...but didnt hear it again. FYI, these seem like ok speakers. Very dark sounding. I dont think they are too much like a V30 however. They're thier own sound.