Dear @prof : I don't know ofr read somewhere that a CS7.2 owner used subs integrated with liberating the Thiel woofers for that low bass range posted.
Yes, I know and heard once thge Thiel sub. My post was specific for your Thiel model but I have to say that my last listening to that model was several years ago and " things " change over time as our " mind " too.
R.