Oops, just because I'm looking at ATI amps, I took a quick look at those ATI pre/pros. To me, it looks like maybe only the 6500 is based on the Eastech platform. The others *might* be different as the config of inputs and outputs on the back are completely different, and even include balanced outputs. I think the 7500 even says "made in US" on the back, whereas the 950 is made in Taiwan.