Patrick,
My apologies for taking so long to get back, but the notification that I had a message was only sent to me a couple days ago. We had a U-tube video of each of the 4 speakers. The link sent to me in December no longer works, but I am trying to find out where they are now located. Email me at HTBAR1967@YAHOO.COM and I can send you the links and other information when I get them.