Pimping your router

@brenn I assume you mean multiple filters or filters and optical. There are a minimum of two points where multiple devices wouldn't be redundant. This would be pre server and post server, these devices will block noise going into server, post server device block noise produced by server from getting into dac.

Some believe daisy chaining these devices is effective as well. I've found daisy chaining two usb rendering devices is effective in my setup. For example at present  I'm using Sonore Opticalrendu followed by Uptone USBregen.

Thanks for the response but forgot to mention I have. Lumin d1 that is a streamer/DAC combo.

With that setup all you have is network optimization prior to server. In my experience pre server optimization much less important than post, still may be of some value to you.

Do you have any suggestions?

Usual suspects. Uptone Etheregen or Eno.