As mentioned in my other post, I've been comparing my old center channel to my new one. I chalk up the sound differences between the 2 speakers to the tweeters...the PSB is a 1/2" poly-flare dome with ferrofluid. My mains(also PSB) are 1"treated textile dome dome with ferrofluid . The Axiom has two 1" titanium tweeters. Can you elaborate on tweeter differences and advantages and disadvantages of each type. What made you decide to use Titanium?