http://www.sheetmusicdaily.com/wp-content/uploads/SheetMusicDaily-300x53.jpg00sheetmusichttp://www.sheetmusicdaily.com/wp-content/uploads/SheetMusicDaily-300x53.jpgsheetmusic2011-04-21 12:10:312011-04-21 12:10:31Groove Tubes Gold Series GT-EL84-R Matched Power Tubes Medium (4-7 GT Rating) Duet