Here is a PAIR of new, fully assembled and tested DIYRE DOA (Discreet Operational Amplifier) colour modules with DIYRE RED-25 opamps. The opamps are removable, so you can use these modules with the included RED-25 opamps, or swap them out for any other standard opamp which mounts on Mill-Max sockets. These include the API 2520, the Melcor 1731, the John Hardy 990, and other variants.

We’ve built a bunch of these modules and don’t need these two. Professionally assembled and tested working.

The pictures show both DOA modules, including the Red-25 opamps. The Buy It Now price is for both modules and both opamps.

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We only ship to U.S. addresses or to international addresses through the Global Shipping Program. When available, we only ship internationally through the Global Shipping Program.

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Guaranteed not DOA.  My guarantee does not cover tampering or abuse. For our mutual protection, I track the serial numbers of all products I sell on eBay.