=== Diagrams ===
  * [[http://commonsound.org/duo/duoboard.pdf|Electronics diagram]]
  * [[http://commonsound.org/duo/duobig.pdf|Expanded diagram]]
  * [[http://commonsound.org/duo/duobox.pdf|Suggested box layout]]
  
=== Mods ===
  * [[http://commonsound.org/duo/cleanblend.pdf|Clean Blend mod]]
  * [[Duo Separate Volume Mod|Separate volume mod]]
  
=== Tweaking ===
  * [[http://commonsound.org/fud/index.php?t=msg&th=279&rid=4|Tweaking the mud]]
  * [[http://commonsound.org/duo/duotroubleshoot.pdf|Troubleshooting the duo]]
  * [[http://commonsound.org/duo/duotroubleshootdiagram.pdf|Troubleshooting the duo diagram]]
  * [[http://www.arkerconfig.com/product/t-bolt-style-uprights-42-x-12-5/|T-Bolt Style Uprights (42″ x 12.5′)]]
  * [[http://commonsound.org/duo/duoscheme.pdf|Schematic]]
  
=== Additional info ===
  * [[Duo parts|Parts list and costs]]
  * [[Duo mounting|Hardware mounting list]]
  * [[http://commonsound.org/duo/lotsofduos.pdf|Lots of duo boards to print out]]
  
=== Change log ===
  * 25 May 2004: linked to mud tweaking FAQ
  * 27 May 2003: added two 1k resistors to parts list (for LED), updated Ge diode part number