I previously had a hub3 with M500 in modem mode connected to a Netgear Nighthawk X6 R8000 which always gave respectable download speed near to 500Mb. Few months ago I moved to Volt 1Gb and with hub4 in modem mode with same router I am lucky to get 350Mb - I have checked usual suspects like QoS but I can see no reason for this sustained drop in speeds, any ideas?
I have had a look into this and I can see there may be some issues with your downstream power levels. To resolve this, I have sent you a private message. Please look out for the purple envelope and provide a response when you can.