OK. My head is really spinning right now. I bought a pair of JBL S310II's a while ago with a Denon 1602. The left speaker was distorting and I was under the assumption that I clipped the speaker with the low powered Denon. So I took the speaker back, and replaced the Denon(With a Yamaha RX-V730). I needed a receiver with pre-outs to add an amp so I wouldn't have to live in fear of clipping anymore. Anyways today my replacement JBL came in. I went down, picked it up, and guess what - same problem. When output hits about 80dB, I can hear the replacement speaker distort while listening to classical music. I haven't pushed these speakers hard since I got the replacement(The highest they have gone is 80dB). At first I thought maybe they just re-packaged my old speaker and gave it back to me, but they ARE different speakers. (I know because I used pledge dust remover on the speaker I returned. If it was my original speaker, it would still smell like pledge.) I've tried many different configurations and the distortion sticks to the one speaker. I've switched channels. I've moved the speakers to other parts of the room. Replaced every cable. Tried a different CD player. Pretty much every thing I can think of. I'm pretty sure I didn't wreck the replacement(Im even starting to think I didn't wreck the first one). My logic is as follows: My Yamaha is not the highest powered receiver, but it should have no problems pushing a single S310II to 80dB peak at 1m. in fact, this requires me to turn the receivers volume almost half way. So, i'm pretty sure I didn't clip the replacement speaker. Now, the original speaker, was pushed to about 105dB on my Denon. Is it possible I clipped the original speaker? I think it's possible. But after getting a second bad speaker, im starting to think it was wrecked to begin with. Also, what about the other speaker .. it sounds great. If I wrecked the first one, wouldn't the second speaker be wrecked too? Has anyone else had this sort of problem with speakers? Two bad speakers in a row seems odd. I have a feeling that my dealer is going to think im nuts when I return this second speaker. I would feel better if I knew that this kinda thing happens frequently. Also, some people say i'm very picky with what I hear. Is it possible for two same model speakers to sound different? One sounds clear, the other distorts a tiny bit? Should I just stop being picky and live with what I think is a problem? Anyways, any insight would make me feel better.