I have the previous generation 7409 htib and it includes a tx-nr609 with 100wpc. Looks like these have less powerful amplifiers.. or maybe they're measuring more accurately now. Regardless, I'm very happy with my htib and how easy it was to set up the included speakers, it came with nice 18gauge color coded cables of good lenth etc. I did have to mail in my receiver for repair as part of a recall, but other than that it's a good system