@db29 

Hi David,  The speed you see in the PLC utility is the link rate, this is the rate at what the adapters are communicating with each other.  They are not the internet speed though.  The internet speed has several factors you have to look at.  This includes distance between adapters. The load and noise on the electrical lines that is created by items plugged in to your home's power, including major appliances not connected to surge protectors.  Also how many hops a connection between adapters takes.  

This thread might help explain the lower speeds.  

To troubleshoot to see if its related to the adapters or the home is move the remote adapter into the same room but a different outlet on the same wall.  Test the speeds.  If they are good move the adapter to the next room and retest.  Keep repeating this test until speeds begin to drop and that will tell you where to look for the interference point or what needs to be "filtered" with a surge protector.  

If they remain poor in the same room then it could be the adapter but i would suggest reaching out to our support team for your area so they can add additionally troubleshooting and help with warranty should they be defective.  

Also something else to consider this particular community is specifically for the US region.  We can help with common questions but this community is for all regions outside of the US