The HT3 woofer is a driver we developed with the help of Acoustic Elegance. The original HT3 design incorporated a 10" woofer produced for us by TC Sounds. But when they filed for bankruptcy a few years ago, we were no longer able to secure them. So we approached AE to produce a very similar driver with some improvements (larger magnets, copper voice coils, etc.). The result is a woofer that is superior to the original TC Sounds woofer and is used both in the HT3's and the SoundScape 10's.