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 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.
I understand every system is different. In my case, I don't have luck in SS preamp. I always feel the sound is too bright and sometimes harsh. I tried upgrade cables, no significant improvement. I tried to change to another SS amp, no luck. I tried to add a DAC with tube buffer, no luck. Until I change to a tube preamp, I start to see the improvement. So, I would suggest to get a nice tube preamp. I am not sure what is your price range, tried to search for the thread for best tube preamp under $1000. I remember some of the suggestions are Mapletree 4 SE, AES DJH, PrimaLuna Prologue 3. I am using a PrimaLuna Prologue 3 now, very good preamp. But you need to pay attention to its very high output impedance and 12dB gain. You need an amp with at least 100k ohm input impedance.
Jafreeman...Clearly you don't know what you're talking about. You shouldn't post
I'm partial to Cary tube pre-amps, but I think the Prima Luna's are among the best deals in all of audio. Great, warm sound, at a reasonable price.

Also, older ARC and Mac gear that is less expensive sounds stellar as well. I like maggie with a tubed pre, and powerful amp. Mellows out the sound with the tubes and gives you great bass with the powerful amps.