I’ve heard Bache speakers several times- in a home and at an audio show. They sounded great both times- he puts his heart and soul into a design, and you can hear it. I have a very problematic room and use open baffle speakers because of their lesser bass interaction with my room.
I use stereo subs to fill in the lowest octave that I crave; the controls- Q, gain, phase, crossover point, allow me to better tailor the bass to my room.