Muffled vocals


I have positioned my speakers every way imaginable and I just can't get the vocals the way I want. They're centered, but they seem like they're in the background.  I want them more up front.  I've tried various toeing methods and room treatment but they still seem a little muffled.  My equipment: Lyngdorf TDAI-2200 integrated, Marantz CD6006, Tyler Acoustics D-20, Anti-Cables, Audioquest digital cable.  I know the recording can have a lot to do with it, but Steely Dan's Aja is known for the recording quality and Donald Fagen is in the back.  My terminology no doubt betrays my lack of sophistication when it come to audio, but I know something's not right.  Any suggestions?
cal91
OP:

If you can't hear a difference it is NOT your acoustics or placement. You may have bad speakers. See if you hear music out of each driver, and compare left to right. You'll have to get close up. 

Best,

E
Just noticed what your integrated is doing. Make sure you have disabled all room correction and tone controls before making any further judgments. :) 
Sounds like one of you speakers is out of phase. Double check your wiring to insure you have maintained correct speaker wire phase for both speakers. Red to right (on both the amp and speaker ends of the speaker cable) and black to left.
Seems like you are using the Marantz as a transport. Try the analog outputs of the cd player into the amp to try and hear any change. The report on the cd player indicated it had a decent midrange, as they tested it using the analog outs.