This is probably not realistic, but I am hoping to find a ribbon tweeter that is excellent, in the 4kHz+ range (24dB highpass) and is not higher than 8cm overall! I know th ravens and ESG2's are pretty small (+/-12cm H), and they still go down to 2kHz or better. So it should be possible. PLease, please email me at maxyott@hotmail.com if you have a suggestion. I much prefer the sound of ribbons over dome, etc. Thx!