Hello,

I bought a Tp-link Archer AC4000 (Archer A20) in October 2019. It has worked great up until this week when I added on a Denon AVR (AVR-X4500H). When I connect it to the network and begin streaming music (via Spotify), the router invariably crashes within a few minutes. The router just drops, resets, and then starts to work again. Since this has happened I've power cycled, uplugged/replugged all connections, updated the firmware, changed the channel/channel widths, and reset the network entirely. No matter what I do it still happens. I have tried different audio sources with no improvement. My ISP is Verizon Fios and it is working fine this entire time. The only time the router doesn't drop is when I disconnect the AVR from the network and just stream music connected via Bluetooth. I have 9-10 devices connected to the router and have never had an issue with this many connections until I added the AVR. 

What could cause my router to restart constantly and is there any way to fix this without having to get a new one?

Thanks.