Comparing Powerline Ethernet to WiFi for streaming audio


Thought I would share my findings.
I have a ROON based music server system with Tidal and Qobuz streaming services. Using Small Green Computer’s SonicTransport i9 Optical as ROON Core, connected via optical cable to a Sonore Optical Rendu (powered by Sonore Linear Power Supply) acting as ROON endpoint. This then connects to Chord Blu Mk 2 via USB, which upsamples and connects to Chord DAVE DAC via dual BNC.
Until very recently, I was connecting my ROON Core to my cable modem/router using Google Mesh WiFi. I was and still is very happy with the sound quality. My audio system is too far from my cable modem to run an ethernet cable from cable modem/router to it. So, I relied on Google Mesh WiFi with a seperate pod situated close to the ROON Core and connected via ethernet. The Google Mesh pod itself had a linear power supply instead of the stock wall wart.
But I just tried a Powerline Ethernet adapter. This uses the home’s internal power cables to route ethernet from one room to another. I always thought that running digital data on power cables was going to be noisy. I bought a NetGear Powerline 1200 (1200Mbps speed). There are more expensive and newer powerline ethernet models available up to 2000Mbps speed. But these come with dual ethernet ports and pass through filtered power outlets. I though for dedicated audio purposes, better to keep it simple and minimize electronics.
Bottom line, I was blown away by the improvement in audio quality of the NetGear Powerline Ethernet connection over the Google Mesh WiFi connection. Mind you, I was very happy with the quality from the Google Mesh kit but the NetGear Powerline ethernet kit was clearly better.
The sound quality improvement was immediate and very evident. More space between instruments and notes. Smoother, more image depth and more air around the notes especially the trailing edges. So, no doubt, the Netgear Powerline 1200 was far superior to the Google Mesh WiFi. I then swapped the Netgear for a similar powerline ethernet product TP-Link AV600. This was recommended by Small Green Computer. The TP-Link is smaller and has 2 pin power prongs. The Netgear Powerlines has 3 pin power prongs, so it has a ground connection to the power outlet. I found the TP-Link to take a step backward in sound quality. The image depth decreased. Soundstage was flatter and there is less air and space between notes and instruments. The TP-Link Av600 was sounding a lot closer to the Google Mesh WiFi. Just my observations, FWIW.
ddriveman

Showing 2 responses by mahler123

I used Powerline Adapters for several years, including the models mentioned by the OP.  Eventually they all crapped out.  It turns out that in my 100 plus year old home that there are several transitions in zones in the fuse box to get from the router to where the various equipment rooms are, and there is a 40 watt drop across each zone.  The Adapters eventually give up the ghost trying to negotiate this.  Eventually I bit  the bullet And paid a few hundred bucks to have someone ethernet wire the place.  The cat 5 is all out of view and everything has worked flawlessly in the years since, with much better performance than WiFi 

I used the same Powerline adapter as the OP.  It worked great and I preferred it to WiFi after 6 months the PLA stopped working.  Replaced it and a few months later same story.  An electrician that we had engaged to fix something else did a measurement and told me there was a big voltage drop between the outlets on different floors and that after a brief power outage that caused the PLAs short out.  I didn’t quite get that but fool me twice…

  I spent about $500 8 years ago to have the house ether net wired.  I’ve got a bunch of devices on 3 levels attached via switches and they all work perfectly.  Best AV investment I ever made