1"Titanium Dome Tweeter/Ferrite Magnet/6O/Frequency Range: 650~40000Hz/Half Space Sensitivity @ 2.83V/1m: 90.5dB
Details:http://www.c-audioloudspeakers.com/Products.aspx?Page=1&Category=MATELLIC DOME SERIES&Title=C25T0907
(C25T0907)1"Titanium Dome Tweeter/Frequency Range:0.65~40KHz