A typical audio grade, single use, Ethernet Filter can work out more expensive than purchasing an audio grade switch with multiple ports.

For example, I require several ports to connect my Router, ROCK Server, plus Meridian 218 and 210.

Not an Actor, nor married to Jamie-Lee Curtis.

#1: DSP5200SE|DSW.2|218|210|506.2|504
#2: Prime/PSU|SOtM sMS-200 Mini NEO SE|Focal Stellia
#3: Other stuff