Signed. I've had amps that had what I thought were "optimistic" power output ratings over the years since I started buying receivers, etc, back in 1971, but my latest one, a Yamaha, the last (for now) going back almost 40 years of having at least one receiver or AVR from them a TSR-7810 is just a joke. I had the same set up when I bought it, 6 SVS BK1 bookshelf speakers, an SVS center, and an old Sony sub. Before I got it, I was running it fine from my aging Yamaha RX-V659, which was outdated on video, but I got by with it, and it sounded fine. I jumped on a deal for the 7810, thinking the power output should be close enough to the 659's underrated output to run my speakers in the smallish room I had my theater in, and it would take care of my video needs for a few years. The first day, I was running YPAO, and was as disappointed as I was the first time I ran it however many years ago, IMHO, it just sounds bad. I was playing a movie, I think it was "Predator", and I cranked it up to my normal listening level, which isn't all that loud. I reached over it to move some cables and could feel the heat pouring out of it. A LOT of heat. I had the 659 for like 10+ years and it wasn't even working that hard and wasn't cooking itself to death. I knew someone with a 7810 and his ran insanely hot too. He had fans blowing on it and even took it out of the stand he had it in to let it get maximum room to vent the heat it generated. I bought an InfinityAir T8 to put on it and while it cooled it down, it didn't keep the transformer from getting insanely hot. I added an external old recapped Onkyo M508 amp to run the fronts and see those pretty green meters, and it enabled the 7810 to have a decent lifespan running just the center and surrounds. Then I moved and bought my present Polk LSiM 703 front L+R and Side surrounds, and a 706 center. It's barely making it, and I can make it shut down fairly easily in my apartment! And a scope on the outputs shows it's right on the edge of clipping if I watch a movie at even on increment up from my normal listening level (-25). The 7810 is being relegated to backup status, even though my 659 is still 100% functional and doesn't seem to strain running the polk center and surrounds,, and a Denon X4500 is replacing it. I'm looking for another amp to run the surrounds and center to keep the Denon happy, as I doubt the power is much more than the 7810's to be honest. Back 20 years ago, I had some old AR power sucking speakers front and rear on my old (much heavier) Yamaha AVR, and it played loud and clear, and I know the Polks I have now don't suck as much power as those larger ARs did back then.. I just remembered the model, RX-V1, a 60+ pound monster I bought used for about half the new price, it was supposed to be 100W a channel into 5, and I think back then, it was accurate, or close to it. It didn't cook itself to death, it died from a lightning strike and became a box that did nothing. Just for grins, I hooked up my 1972 vintage Panasonic SA-6500 receiver, which is rated at 50WPC, and in tests of it I did myself, it almost made it, it did 47WPC+, it ran the Polks fine and to be honest, sounded a lot better too, I don't know why. All it's had done to it was new PS caps and the sliding controls cleaned since it was new..
