No distortion
Clearer Sound (high frequency)

Size (but no big deal)

Awesome sound!!! The Ribbon Driver is probably the best invention to come along in speakers for years! SLSAUDIO.COM can explain it better than I can but basically what the ribbon driver tweeter does is give you much less distortion while giving you clearer high-frequency sound. The difference is much more noticeable at high volume. Definitely listen to one!