The 6 attached pages are from SPEAKER BUILDER 11/99 Response to 12 hz, 50w input power. (as I recall) Scanned at 600 DPI, then converted to a Postscript file, which was then processed thru a "DISTILLER" to make the PDF, which is a very compact and lo-loss format. They are in Adobe ACROBAT PDF format, Free readers are avaib from http://www.adobe.com/