I recently purchased these in like new condition, the downside is that they have been in storage for about 14 years. Is there anything I should do before hooking them up and turning them on? Sorry, it is a gfa 555 ii amp
I believe you would be best served having a tech power these up on a variac. At least this is recommended with tube equipment that has been unused for a long period of time.
I would also recommend having the tech give the amp a good go through. I think you will be pleased with the performance of the GFA555II. A nice amp for the money.
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