I have never heard of the 5000A, only the SA-5000. So no, I was strictly talking about the SA-5000 in comparison to the SA-5.1. The SA-5.1 is one of the biggest steals in high-end preamps if you can find one for sale. We traded off my brother's SA-5000 to a guy with an SA-5.1 because my brother was tired of waiting for one to show up for sale. He would have made some money had he sold the SA-5000 and bought the SA-5.1 outright. It was just a way to smoke one out from someone who thought the SA-5000 was better.