I got this amplifier recently listed as a 4 pill and I've done a little bit of research but can't find anything on this particular model. I have found information on tx800 but not much else. I went ahead and took the cover off and turns out it's a 1 x 4 all mrf454 transistors. It's very obviously been tinkered with/ repaired with new resistors here and there and mismatched switches. If anyone could tell me when/where it was made, how much power to drive it with and what I could expect to see out of it I'd greatly appreciate it. It will be going in my truck with a president McKinley and a predator 10k.