The 8900 and 8900a were made in the USA and are more powerful. They also sound more modern that the S7200. They have a more clinical sound than the S7200. The S7200 sounds more tube like for some reason. For the price I found the S7200 to be excellent. I have all three and won’t part with any. My S8900 is on the long list of to be serviced, but is still a nice sounding receiver.