2520 Discrete Operational Amplifier

The SA-25 is a 1:1 fully  discrete replica of the famous Huntingdon 2520 discrete operational amplifier found on the early API consoles from the 70’s.

It is used on our SA-4000, 25609, 312+and 312-5T. It can also be used as an upgrade to other OEM units and DIY projects.

Compared to most replicas in the market the SA-25 is a 9 transistor design and sonically identicaly to an early 70’s Huntingdon 2520 Op-Amp

Each 0p-amp comes with PCB pins and with a 3 year warranty.