Ahh, this makes me feel better. One of the tweeters on my M60 wasn't working (that's why there was such a big tonal difference between M60 and VP100
) and the replacement said "Axiom" on the front instead of just "A". I figured I had gotten an older tweeter as a replacement but it sounded just like the other one so I didn't care.
It's good to know the replacement was newer. It would be interesting to know the difference between old and new designs but I normally find I don't have the background to fully understand the answers anyways