Call Leonard at Audio Research (phone no. is on their website at audioresearch.com) and ask him. Probably no problem having someone do it for you, but some gear was built w/the integral power cord and ground essential to its operation and you screw up everything by putting in a new cord. I have both older and new Audio Research and use the power cords the older stuff has hardwired into the back and Ensemble power cords on the new stuff. I love Ensemble power products but really I can't tell if the audio research cord in the preamp I have is inferior! Look into some sort of power conditioner for your gear, and plug the factory cords into that! Now that can make a real difference in the sound of a system. I use Ensemble, but have also tried the PS Audio, which is excellent, and a Transparent conditioning box as well, which was very good. I'd go that route before changing out my audio research power cords.
Just my opinion!
Just my opinion!