Another vote for Network Acoustics ENO filter from switch into 818.

I can also highly recommend their M-Links into DSP (if you have them).

They are also working on some specific SpeakerLink cables ... not yet available though.

Music Room: 818v3, DSP8000SE (SpeakerLink cables), iPad control
Shunyata Denali Power Distributor, fed by SIgma NR V2 + Sigma digital(818) + 2x Alpha NR(DSP8000SE)
Network Acoustics ENO filter + Rubicon Switch(powered by IFI IPower Elite)

Office: Stax SRS2020 via ifi Signature
Spare: DSP5200 + MC200

Running Roon Core on SonicTransporter