I recently bought a pair of these speakers as they were rated one of the best in their price range (I paid $166 new off Ebay). I've been watching movies on both Blu Ray and DVD as well as playing CD's. But last week, one of the speakers started to buzz whenever the lower bass notes sounded. I looked at the cones, and none of them were torn or damaged. It doesn't happen all the time, but I'm wondering why it happens at all. I'm using a Yamaha RV-502 amp which seems to provide adequate power. The overall quality of the speakers is very good for the price, but the buzzing is unacceptable. I'm using 20-guage speaker wire for the connections.