Speakers : Klipsch RP-280F
Center : Klipsch RP-440C
SW : Klipsch R-112SW
Having owned only Pioneer receivers VSX-52 Elite & one prior (don't remember the model number); I was looking for a new AVR that supported 4k w/HDCP 2.2 so I decided to purchase the new SC-LX701. After running the MCACC and manually adjusting with REW using my UMIK-1 I was not happy with the sound the unit was producing. I have always enjoyed my prior Pioneer AVRs but this unit to me sounds to bright & artificial. I spent hours tweaking EQ & level settings never to achieve a natural sounding sound stage. I cant say why the SC-LX701 sounds so drastically different from my VSX-52, it could be the DACs or the different Class D3 amps. I ended up exchanging the unity for an open box Yamaha 2060 for $300 off sticker. With the Yamaha I ran the YPAO, set the speaker size, X-over, set the subwoofer level and was done, this was by far the best most natural sound I have had with minimal to no effort on my part. I haven't even run REW and don't think I even want too.
I know Klipsch are suppose to be bright speakers to begin with but with the Yamaha they sound so amazing.
Please don't read this as Pioneer bashing, I loved my prior Pioneer AVRs, I just wanted to share my experience with the SC-LX701.