You write: "I just upgraded a used Audio Research tube Preamp and a power amp." Do you mean that you upgraded to a used Audio Research preamp and amp ... or that you had the used preamp and amp upgraded?
Also, as obvious as this is, if the used equipment is new to you, do you have your old equipment? That would help isolate the problem.
If you haven't already, you might try playing Mike Oldfield's Tubular Bells. What do you have to lose?