Quick thought (apologies if it doesn't work) - but isn't what you really need a (second hand) Meridian 271 ?

Arcam AVR -> 271 Analogue in -> Speakerlink or Analogue output -> Meridian Speakers ?

Selling a couple of 218's might fund an - admittedly rare - 271.

Trinnov Altitude CI-12; Meridian 861v8 + ID41 + UHD722v2 + 271, 2*SE-update DSP8.2Ks, SE-update DSP7200HC, 4*DSP3200, 4*DSP33, 218, 251
JVC DLA-NZ8; Panasonic TX-P60ZT60E; Lumagen Radiance Pro 5348
Roon [13i7 Win.11 NUC]; SKY Q; Oppo UDP-203EU; AppleTV / Fire Cube / Roku / NVidia