How long have you had the speakers? Is it possible that they are not fully broken in?
Magnepan LRS+ resistors on the tweeters… which?
I have a pair of LRS+ and after playing with the set-up positioning for a while I have finally found the spot where everything aspect of the sound is right apart from the treble: it is simply too high, and is tiresome after a couple of records.
But Magnepan knows it and fit a pair of sockets to allow the user to play with 10W resistors, ranged from 1 to 2 Ohm.
The resistors that come with the speakers are not the best and some users refer that they affect the sound too much.
So I wonder, what are the best resistors to fit in the LRS+ ?