Need help ...

IMO the source is the biggest influence in sound in a system although others do not agree with me.  The Mac has a sound that is usually very musical with sweet mid-range sound.  That is more of a preference.  The suggestion to use the Pass preamp will change the sound from the Mac preamp so this is a preference thing again.

Happy Listening.

You have a good system. Your best bet for improvements are room treatments and cables.

thank you very much to every one give me suggestions. ....now i think i should sell MC C50 and looking Pass labs xp30 0r xp20. these speaker cable i’m using MIT cables and XLR shunyata connector and i’m thinking to placing some panel to reflex the sound it will help better sound right !

The Oppo is fine choice for background music or movies, nothing more.  With it as your source the rest of your equipment is way overkill.    

tanlv702,

Relax, Take a look at my system; similar to yours. Use Pass and MIT. Have had Wilson in past. I am still using a 26-27 yrs old CDP. Only thinking off replacing it due to on off has become unreliable.
I am a vinyl guy, so no hurry to replace it.
As others have suggested; Take your time. Get to know the equipment you have. There will always be better/ newer equipment to have.
 I am a firm believer in treating your room. DEDICATED ROOM is Key component. At least area behind and sides of your Speakers.
Again, Speaker position 1st. Then room treatment. If you want everything Now; hire a professional to do it. But I think you would learn more just taking time to study, learn and do it yourself over time. New digs can change things and you would need to start over.
Plenty of resources out here.GIK acoustics,"Master handbook of acoustics " Are good places to start.