Sonos Connect: Add new features to your old stereo or home theater equipment; use this Sonos Connect component to integrate your external amplifier, receiver or powered speaker into a wireless audio system.
I got this because I wanted to use my Pioneer VSX1021 and my Martin Logan as a zone. I currently only have a Play5, and this really rounds out the sound. I had a little bit of an issue with my receiver processing the music too much so I set it to Pure Direct. That helped a lot with the echo I was getting when the receiver was doing too much processing on the audio.
My pet peeve with the Connect is that on variable volume I have to turn up the receiver up to 100% in order for me to be able to hear the audio. Which becomes a pain in the ears if you switch back to another source as it's then at 100%. I did set the Receiver to come on at 50% power when I turn on the system so that it doesn't come on at 100% but that doesn't help when moving through inputs.
If turn off variable audio then I have to use 2 different apps to control the volume for both sonos zones. I'm looking forward to when I want to upgrade my receiver and just go strictly playbar and put the connect in the garage with some powered outdoor speakers.