I apologize if this is not the correct NG to post this in.

I just finished sending my Infinity Alpha 40's out for warranty work.
Somehow in the last two months I blew one of my tweeters. I couldn't
actually tell by listening that a tweeter was blown (I am green to
home audio). I decided to check out the tweeters on the speakers
after trolling different audio newsgroups and somebody had posted
describing recurring problems with the tweeters in this model speaker.

I think because I am so new to audio I may be turning these things up
way too loud. Is there a way I can tell how loud I can turn these
speakers up without risk of damage?

There is also a chance that the tweeter was blown before I bought them
because they were floor model speakers.

FYI: My receiver is a Yamaha 5650 and my speaker wire is 16 Gauge
Monster cable...and yes I know I got ripped off with the monster cable