amp/Speaker bass output

Hi all I've recently switched to an Audio Research CD2 & Classe CAP151(intergrated) driving Apogee Slant 6 speakers plus 4 Room Tunes and Corner Tunes, speaker and ICs are RC Audio (hybrid) what I was usung before were Yahama AX900U (integrated) and Sony X77ES Cd player, the Classe is just georgous but my bottom end does not seem as prononunced as once was I was thinking maybe an IC change would help (going to XLR CD to amp) butI only want to increase the bottom end responce a bit. Do I have to look to different equipment? (please don't tell me that's so) or get I do it another way.
I want to retain my staging and depth but if I had to change would maybe a Krell integrated be the right way or maybe ARC D130/LS3, Aragon 2004/LS3?
Suggestions would help Thanks