March 2004 Reflective Wave Guides for the reproduction of high frequencies (AES Italian branch) (pdf, 3.56 MB) January 2003 Butterfly system White Paper (pdf, 1.5 MB) January/May 2001 Concise parameters for assessing a pro audio system for sound reinforcement use - - Part I, January 2001 (pdf, 464 KB) - Part II, March 2001 (pdf, 975 KB) - Part III, May 2001 (pdf, 353 KB) November 2000 Getting rid of a thorn in the side (pdf, 79 KB) December 1998 Objective differences in the performance required from professional sound systems for correct reproduction of club music or Pop/Rock concerts (pdf, 756 KB) December 1997 Single-point frequencies, gnomes, elves and other strange tales (pdf, 43 KB) December 1995 Unimetal - Outline Compression Driver for Superior Transducer Technology