The “Ten81” is a DIY Neve 1081. The pcbs, which were designed and offered in 2003-2004 by GroupDIY member “Tommytones,” are a clone of the legendary and highly complex 1081 equalizer and preamp module.

Further reading:

• NRG Recording hosts an updated (2009) PCB layout with component overlay.
• Kubarth’s collection of Ten81 links
• A GroupDIY discussion of the project