The ADA-1000-3 may not be adequate at Chris's listening distance depending on source used.

I find the ADA-1000 gives out when my Onk volume is set to just below 0. That's less than 100dB of peak output at the M5s in 2.1 with Tidal HD over my Chromecast Video. Blu Ray over PS3 is absolutely no problem. The Onk is just fine for that with no ADA needed.

The ADA-1000 has no problem driving the M3 or M100 to 103dB and above but the M5 just isn't as sensitive.

House of the Rising Sone
Out in the mid or far field
Dedicated mid-woofers are over-rated