I was just going through some of my older CD's collection trying out my 2 week old speakers, 2 Paradigm Titans, 2 Atoms (surrounds) and a cc-170. The 2nd CD I put in I switched from the "Pro-Logic Music" setting to just stereo with the subwoofer still on. I checked my setup and had my main speakers set at Normal. I own a Kenwood VR-507 rated at 100W per channel, and it has 2 settings for the main's Normal and Large. I have them set on Normal. I had in Christopher Cross (not sure if you're familiar with him, but did alot of easy listening music in the 80's) and was listening to "Ride Like the Wind". I noticed when the bass hit I could hear a popping noise coming out of one, or both of my Titans. It starte when I had the thing turned up about 3/4 of the way. The receiver goes from -100 to 0 and I had it on about -30 or -28. I was only using stereo mode when I noticed the popping. Now, the Titans are rated to be used with a 100 W/ channel receiver so why in the hell would I be bottoming out these speakers with my receiver set to normal? Is that what was causing the popping? And if I was overdriving them.. have I cause serious significant damage? When there was normal just low base tones.. I didn't notice the popping, it was only during the bass drum beats. Please don't tell me I've destroyed my new speakers. When I turned them down and listened to them about halfway.. they sound fine.. even on sustained low-end sounds. And when I put in "Independence Day" on DVD and listened to it turned up pretty high I didn't notice this popping. I don't think I damaged them if i was bottoming them out.. but I'm surprised that I was.