Aperatures, is that the room treatments?
Exactly. They are excellent in my limited experience. NO change in tonality, everything came across less mechanical. We tried Seal - Greatest Hits...generally well recorded/mastered but can sound a touch like an '80s mastering from time to time. As soon as we put the apertures in (4 of them)...his voice and everything became SO natural, we instantly realized Seal is quite a gifted singer with real nuance and verve. It was quite remarkable.
Look forward to hearing them permanently in the system. Since ordering them, I have also got a few other tweaks which I have been meaning to get in, so it will be nice to have them all in.