[pat 75]

i search schematic amplifier proton AA2120 thank you in advance
pat75

[Letitroll98]

You might try https://www.hifiengine.com/ You have to register on the site to search.  I remember Proton amps as being an alternative to Adcom, Parasound, Rotel, et al.  Don't know what happened to the company.

[Letitroll98]

Here's an excellent article about Proton products, I didn't notice the AA2120 mentioned.  The article has been updated as of Aug 21, 2021, so it's not a moldy old post from years ago.  Interesting that they were made in the same Tiawan factory as NAD components and the 90's Dynaco products.  The rear panels look almost the same as some NAD components.  Some Proton products had a dynamic power circuit with a separate transformer and capacitor banks for extra power on a short term demand.  For example the 50 watt power amp (1150?) delivered those 50 watts in class A, then the other power supply kicked in for 530 peak watts (!).  I think I'll keep an eye out for these on eBay etc.
https://therobbcollections.blogspot.com/2018/07/proton-audio-nad-and-dynaco-are-cousins.html?m=1