I am thinking about getting a Zrock2 for use in a system that has digital solid-state source components.  I am wondering if the Zrock2 provides some benefits to the sound in such a system even when no EQ is being applied.

For example, the product description for the Zbox says it "causes an increase in favorable harmonics and a decrease in objectionable distortion."  Does the Zrock2 provide this same benefit?

Thanks in advance for any thoughts on this.

Thank you, Archie, and I think your response is helpful (sorry for the less than clear question).  I am trying to understand if the Zrock helps solid-state digital even if it is not turned up very high, and I appreciate learning what your actual experience has been.    

I hope you will have your upgraded ZMA back soon!

Thanks for the additional info.  I had read your original post as expressing more negatives about the NAD amp and not the ZR2.  I am certainly seeing very consistently positive views of the ZR2.