<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <HTML><HEAD> <META http-equiv=Content-Type content="text/html; = charset=iso-8859-1"> <META content="MSHTML 6.00.2600.0" name=GENERATOR> <STYLE></STYLE> </HEAD> <BODY bgColor=#ffffff> <DIV><FONT face=Arial size=2>If one of the coupled strings goes = flat by 4 hz, the combined pitch drop would be 2 hz.</FONT></DIV> <DIV><FONT face=Arial size=2>  </FONT></DIV> <DIV><FONT face=Arial size=2>If the uncoupled string goes flat, it = is business as usual for wandering unisons.</FONT></DIV> <DIV><FONT face=Arial size=2>  </FONT></DIV> <DIV><FONT face=Arial size=2>The coupler will delay the overall = degrading of unisons, but not prevent, reduce or delay the failure of the = uncoupled unison.</FONT></DIV> <DIV><FONT face=Arial size=2></FONT> </DIV> <DIV><FONT face=Arial size=2>So the couplers reduce the chances of = an audible unison failure over a given time period by about 50%. </FONT></DIV> <DIV><FONT face=Arial size=2></FONT> </DIV> <DIV><FONT face=Arial size=2>ES</FONT> </DIV></BODY></HTML>