Matrix is correct, get yourself a McIntosh preamp with equalization. The more current models are designed in such a way that the tone controls are truely out of the signal path when they are set to 0db. Although I personally do not use equalization now but have in the past, it could hold water that one slight turn of a tone control could save you hundrerds if not thousands of dollars in tweaks!
I know this is heresy, but...
I am interested in adding some sort of equalization within my system....tone controls for lack of a better analogy. I know that years ago Audio Control used to make a band equalizer. Anyone out there making that sort of device today? Basically I am looking to add a little more bottom to my system without adding a subwoofer or adding a lot of noise to the sound. Thoughts?