A buddy has an AU-717 that he's had for awhile. He drives 4 Klipsch speakers (RF82 and something similar) using the aux input. He plays CDs at very high volume levels while he jams along on his guitars in his lil studio; guitar is fed into separate amps. It started going into protection when he'd reach a certain volume level, so he'd been just "babying" it and not turning it up QUITE high enough to push it into protection. Thinking that a full restoration would solve the issue (since he said that it hasn't always gone into protection), that's exactly what I did. Pretty much every thing was performed according to Ben's recipe in the "Leestereo's Restoration/Upgrade Of A Sansui AU-717", including upping capacitance and voltage where recommended. I say pretty much, because I also replaced the filters caps (with Gold Tunes), and TR603 on the PS/Protection board. Post restoration, was able to dial in Bias and offset perfectly...AND the unit sounds amazing! BUT...the thing still goes into protection when driven hard. Seriously, he's listening at levels most of us wouldn't, but he played in a band when he was younger and want's to pretty much play just as loud during his jam sessions! The volume dial is turned up to just past 1 o-clock and is ok, take it to 2 and she shuts down. He says it is actually louder at the place where he used to turn it up to, and is very happy with the results overall. I am wondering though, why is it still going into protection after a full rebuild? One picture - since I didn't want my post to be "worthless"