A dozen years ago I bought a pair of (single driver horn) Cain & Cain Abbys and fell in love with their sound, but the bottom end was just not there. I fixed that with a nice pair of subs, which not only filled in the deep bass but also added loads of dimension to the soundstage. A couple of years later I was reading about the Fostex supertweeters and decided try out a pair of T900As. I didn't really feel my highs were missing anything, but once I put in the T900As there was no going back. As you say celebrat, supertweeters add not just a bit of sparkle but open the soundstage further and deliver more precise imaging, and surprisingly, articulation to the bass. One of my T900As failed about a year ago and I was happy to pay $500.00 + for a fairly hard to find replacement. I really didn't want to listen to my system until the new one arrived.
Over the past 10 years I've lost count of how many sources, DACs, preamps and amps I've gone through, but I have had no interest at all in replacing my speakers, the supertweeters are here to stay!
•8 ohm impedance
•Frequency response from 5kHz to 38kHz
•106 dB sensitivity 1w/1m