I 'm using the cal alpha/delta w/96-24 upgrade.sounds very good with my arc ls16 &arc100.s thru vandersteens 2ce sig's.i just recently upgraded to the orchid aes/ebu and it totally elevated the sound of this setup-more detail , air,and soundstage than i thought the cal's could deliver.great combo,and you could find it cheap,used!also upgraded to anaconda/python for the arc's,another great step towards hearing what's on these redbook's.
