Op we were electro dealer for many years the aw 400s are excellent however the best combo we eve heard with our atcs was the Coda 16 power amplifier which had even better bass control and slam while also having a rich well fleshed out midrange, and a much wider sound-stage,then the electro amplifiers and we combined that with the awesome zesto leto line stage the sound was incredibly life like and vivid we were talking about that particular demo for weeks after wards.
Dave and Troy
Audio intellect NJ
Atc, Coda and Zesto dealers