Simaudio Moon Equinox integration problem.

I've recently added the Simaudio Equinox to my system. My problem is I now have too much high frequency content. I am running the Equinox into the Simaudio I-5 integrated amplifier feeding a pair of Totem Hawks. All of these units are noted for being quick / fast but none of them (at least by themselves) are noted for being shrill or overemphasising the high frequencies, but that is what I have. The sound seems clean, not distorted, but just too much high frequencies. I am wondering if this is an interconnect issue? My interconnects are Prolink, which I picked up used, and I think they are pretty cheap.
I'd like to hear from anyone has successfully integrated the Equinox into a similar system what they recommend for interconnects...what has worked for them. So if you have a good system based on similar equipment what did it for you? I'd really like your help. Thanks

Rod