With what are you driving the Avantgardes(tubes or SS), and using what interconnects/cables? They are very revealing of any shortcomings upstream. Not to say there has to be junk before them, but any stridency/glare/grain at all could become intolerable, given their high efficiency and frequency extension. For instance: If tubed- ditch the EH's and find some nice bottom-getter Sylvanias from the 40's. If you were using silver interconnects, a high quality copper might aleviate the problem(ie: Kimber's KS-1121). If your source were a Sony SCD-777ES, you might want to have the piece tweeked(as many others have) as they come from the factory with an upper-mid/low-treble edge. Unless you audition the Wilsons in the same system first: you may buy into the same issue, given that they are also very extended, though not nearly as efficient(93db vs 103db/1w/1m). Either of these excellent systems will act like a magnifying glass toward the rest of the soundstream.
