I agree with Gmood1. Your speaker's peak into the 5-10K area can (1) be irritating in its own right, (2) will accentuate harshness in your source or amp (NAD is low powered and could get harsh if pushed), (3) be aggravated by room reflections.
Other than EQ you will NEVER fix that peak with any reasonable solution. Sorry to say, but ditch the speakers. I'd suggest some Epos but they will quickly show the shortcomings of your NAD. Then you'll have to fix the amp and then the source and on and on and on . . . . .
Other than EQ you will NEVER fix that peak with any reasonable solution. Sorry to say, but ditch the speakers. I'd suggest some Epos but they will quickly show the shortcomings of your NAD. Then you'll have to fix the amp and then the source and on and on and on . . . . .