Picked up my 517 this afternoon from the shop. Prior to this I had not heard the amp in person so it was a nice surprise when I was able to get it all hooked up and ready to play. My current speakers at 90db and I only had the volume level set around -43db for my normal listening level. I have since added a pair of 12db attenuators on my Aux line in. With the attenuators I'm now running the level around -43db or -40db for average listening with music which isn't a big change but it gives me some more play on the volume which is helpful. Its a really nice piece of gear and I'm looking forward to letting it burn in for a bit before give it some more critical listening time.