Opinions needed-fatigue


My system is as follows:Exposure 2010DS Integrated,Tavish Classic Phono, Pioneer PL-630 TT w/Shure V15ii cart,Audiovector M1 Signature on Target stands filled with Silica Sand,Transparent cables loom
Also, I guess part of the listening system would be my totl Widex hearing aids. Speakers are 6’ apart, 2’ from back wall. Listening chair places my ears about 6’ from them, and right at tweeter height, direct center. Imaging is great, separation is fantastic, for the most part very enjoyable. I have a thing for "audiophile vinyl pressings." Trouble is, I find the highs fatiguing past about the 9:00 mark on the volume dial, or right about 76 or so db (IIRC) depending on the track. Duane Allman solos, horns on jazz recordings, etc. Is it reasonable to think I should be able to listen louder at such close range, is there an obvious weak link in my rig causing the fatigue?
128x128j_husker
If you can move your chair back at least 3 feet or so, you will be amazed at the difference in sound.

You don't mention 'toe in'. How much (if any)? Distance from side walls? 
IME 6' is a bit too close for near field listening. An 8ft equilateral triangle, or something close thereto, with the speakers further out into the room could be much better (assuming you have the space available).  
You getting blistered. That's what I call it. mids are WAY forward and the high right at eye level.. 8-12 feet and put it just over you head with a laser pin.   Maybe..
Shure V15ii
Does it have bonded elliptical stylus, not original one?
+ medium mass tonearm
Another thing to try is toeing  the speakers in so the tweeters are crossing about a foot in front of you or pointing at your shoulders rather than directly at your ears.
My brother has to remove his hearing aids when listening to music. He finds it way too bright with them in.