http://www.sheetmusicdaily.com/wp-content/uploads/SheetMusicDaily-300x53.jpg00sheetmusichttp://www.sheetmusicdaily.com/wp-content/uploads/SheetMusicDaily-300x53.jpgsheetmusic2011-04-19 14:01:572011-04-19 14:01:57Groove Tubes Gold Series GT-6L6-R Matched Power Tubes High (8-10 GT Rating) Quartet