Devil, The atc's do have some very fine bass. They offer some decent power and control in that reigon. Taken in isolation I would be very happy with them!

It's just by comparison the PMC's offer much more low frequency volume. It's like the difference between turning a sub on and off. Also, when I turned the PMC's up to really silly volumes there remained in scary tight control. Something I've never heard so well at those immense volumes, at such a low frequency.