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(((I am using mid 90s NAD with AP Oval 9s.)))
A few thoughts
A Were you in the same room?
if new room try 1/7th in from wall behind speakers and 1/9 from side walls measure from dead center of speakers, this particular set up allows decent room optimization.
B Are both your speakers now set up with proper and exact same tilt back laser checked?
once you try the above measure the speakers distance from tweeter to tweeter and make sure you listening chairs and ears are withing the same triangle x 1.25
C Were you using Oval 9s back in the ninety's?
or maybe Audioquest back then?
Perhaps you may have to go backwards to go forward?
D Take a laser from your ear and find the first reflection points by sliding a mirror on the side wall and shining the laser at the mirror until it reflects on the the speakers tweeter then put a small tapestry plant or diffusion there to maximize performance.