Great driver selection for a mid-range, portable, two way. While the replaceable base is a novel idea, I woudn't waste time porting that build. Any time I've run a small driver below 65Hz, I lose midrange definition, and imaging.It's not noticeable at first, but once you free the driver up to handle midbass duties only, everything improves.
This amp looks fantastic though. I'm between a Hypex and minidsp right now for my pair of sealed TC Sounds Epic 12s .I use a dbx 260 for processing, so a plate with minimal controls is actually preferred.