My wife and I did have our hearing checked and she could here the high frequency test notes above 12k -14k and I could not! I could hear nothing and she picked them out with no problem. I heard the deeper notes that escaped her ability. I was told this is common as you stated.
Is it too bright or is it high resolution?
It has been said in the forums that one mans bright sounding amp is another mans high resolution amp. Some amps and preamp combinations can deliver a high resolution presentation and to others this may be considered too bright sounding. Is there a fine line that can distinguish between the two? Personally I like very revealing & the fine details delivered but the wife says it sounds a tad bit too bright.