ZU
http://www.zuaudio.com/
ESSENCE
[download specification]

Essence is a high-effi ciency, high-output, direct radiating fl oor standing loudspeaker. It features a full-range Zu designed and built driver, full implementation of the Zu-Griewe loading technology with fi xed gap, no crossover or fi lters on full-range driver, complimented by a high output transformer coupled ribbon tweeter to provide the sparkle and resolution from 12 kHz and up.