The 7 tweeter is ceramic carbon dome it appears that the midrange is a Ceramic carbon 4” cone type.I've not taken apart my TZ-7 but I am curious about the claim that the material in the tweeters and midrange is different as they appear identical to me. I thought it was just the midrange in the TZ-9 that was different with the graphite composite or whatever. One day I will look inside I guess and take pictures and compare. The woofers do have a different frame from the S-T500.
The 9 is a carbon graphite dome type for both the mid and tweet.
