So, I've been struggling with a fuzzed/distortion problem in my Avatar B210 for the last month or so. I'd isolated the problem to the tweeter, and just assumed that I'd blown the diaphram at some point. In one of the other threads here, I ran across a reference to the diaphram getting dirty over time, so I got out my trusty can of compressed air, blew the sucker out, and the fuzz is gone. Just thought I'd pass this along in case anyone else also jumps to the wrong conclusion. A $5.00 can of air is cheaper than a new tweeter. This'll be on my list of basic maintenance for the future.