Hi, this is Ezra, owner of the ulfbhert Be's to which my dear friend Tejay was referring. I have also heard the regular ulfbhert speakers as compared to my beryllium ulfbherts . I find it amazing as to how men perceive and interpret sound differently. first, allow me to give a brief description of my room with which I have lived for twenty years and am most familiar with. my room is 15 ft wide by 26 ft deep by 8 ft high. it is cement on dirt with bank carpet. it is 6ft under ground. not small, but not nearly as massive as Tejay's room, which I have visited many times. I have been quite fortunate as to have such industrial luminaries as, Magico's Alon Wolf, Albert Von Schwiekert, of Von Schweikert speaker company, Barry Ober formerly of JL audio Clement Perry of stereo times and many others , all stating that my room is one of the finest they had ever heard. I have heard the regular ulfbherts on different occasions, and I do find quite a difference. First consider the differences in the materials, cloth vs metal. by the very nature there is an undeniable difference. Just consider the molecular structure of metal and cloth. In my opinion,to deliberately attempt to get them to sound alike, let alone identical, would be a monumental scientific task. To my hearing, the beryllium is quite a bit faster and much more extended and cleaner, however both designs are quite musical. Herein comes preference , or possibly budget. I think Eric Alexander to be quite a genius in his abilities and accomplishments. I think him to be to quite astute. As to double the cost, go through excruciating design changes just to get the same results? I personally would not insult his intelligence. Both speakers, in my opinion are ground breakin, sonically competing way above their price point. As a matter of fact, I sold a $70,000.00 pair of Sonus Faber Lilium's and replaced them with the double impact se's. Why? because in my opinion the double impacts were sonically superior. the ulfbherts? another league. However I think wherever you go within the Tekton line you win. just my opinion, I have no desire to bicker or fight. we are all entitled to our own opinion, this is simply mine. With due respect. Cheer's, Ezra