JBL technical stuff - relating to all aspects of sound system design plus information on their products. Some extremely useful material. http://www.jblpro.com/pages/tech_lib.htm Includes: a.. JBL Professional Sound System Design Manual - 1999 Edition (Pt.1) (945kB) The updated version of the acoustics reference manual by John Eargle (Part 1&2). a.. Tech Note Volume 1, #26A: (2.3MB) Speech Intelligibility (Part 1&2) & much much more RM -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist