Mr. $T$ Member Joined Sep 15, 2001 Jun 7, 2002 #1 This is a invention by aopen to produce a better sound quality. link to page
OP Mr. $T$ Member Joined Sep 15, 2001 Jun 7, 2002 Thread Starter #2 The problem with it is the tube only last 5,000 hours so this is a huge down fall.