OP-X preamp ?

williamfriggle Posted 2006-03-08 3:05 PM (#263069) Subject: OP-X preamp ? Joined: April 2003 Posts: 183 Location: Denver, PA USA Hi all, I just got my 5778-4ES w/ the OP-X preamp. What does the Notch button and dial do? Forgive my ignorant guestion. Bill MWoody Posted 2006-03-08 3:24 PM (#263070 - in reply to #263069) Subject: Re: OP-X preamp ? Joined: December 2003 Posts: 13987 Location: Upper Left USA The notch allows you and the Bass Player to remain friends! Turn it to find the frequency that is causing the feedback and it will prevent it to some extent. williamfriggle Posted 2006-03-08 3:44 PM (#263071 - in reply to #263069) Subject: Re: OP-X preamp ? Joined: April 2003 Posts: 183 Location: Denver, PA USA THANKS