I am not certain you can use and 818v3, 808v6 or 218 with a Meridian processor and get the full benefits of MQA.. There are some solutions (one addressed on this forum about a phantom source) and I have run SpeakerLink out of my 808v6 into an AC 12.. Then run spidf from AC 12 to 8000SE's.. Not sure if you get the full benefit of unfolding within your SE speakers without a SpeakerLink direct connection though..

Main System: 861v8, 808v6, 8000SE (l, r), 7200SE (c, rr, rl)
Living Room: 861v8, 7200SE (l, r), 5200SE (c, rr, lr)
Control:15 (2), MC200
Kitchen: G91A