Magnepan 1.7 too bright, HELP


I just bought a used 6 month old Magnepan 1.7 and hooked them to my old system, which consists on a Deonon 2900 Universal player, Emotiva USP Preamp and Rotel 1080 power amp and use anticables for speaker connections, and monster cables for interconnects.

The sound is too bright for me, I used the provide 1 ohm resisters, still too bright, any recommendations.
bnrimal
I took me two years to get my 1.6 set up . First i hung floor to ceiling curtains behind the speakers. This helped.Next i added "superchunk" bass traps in the 4 corners. Finally a full 4" wall treatment of OC panels behind the speakers .This tamed the highs significantly.Cost me around $200 for materials .$700 w bass traps. I had the anticables at one point and found them bright.Kimber Kable hero interconnects work well.Also 12tc speaker wire from KK.
I would look at your source first,then I would dump the emotiva I had one for two weeks and sold it my old hafler sounded much better its not the maggies.Try and find a tube pre after looking at your source first.Do not bother with cables they can be changed later.I wish I had the maggies they are fantastic much better than the ones I had.
Thanks for all the interesting suggestions, I guess I have at least a few weeks project ahead of me, experimenting.

If I were to change one of the electronics, to make things a little warmer, cd player / pre-amp / power amp which one would be the best bang for the buck, I cannot afford to change all three at present.