Recommend a 20A power cord?

I'd look into Stealth HAC, at www.interlinkhouse.com. Full disclosure: I know the designer, and so can be assumed to have a bias. These power cords made a big improvement for me. I had previously used power cords by Classe (old) and Cardas (more recent), and homemade ones that were better than either of these, IMHO.

I've been very happy with Synergistic Research Master Couplers on McCormack DNA-2DX. Craig

I have the Rowland Model 10 (which employs the digital switch mode power supply) and use the Model 11 from the Custom Power Chord Company (CPCC). It's reasonably priced ($300? for 4 feet) considering the state of high end audio. Check out the reviews in TAS of the Rowland Model 8Ti.

there is absolutely no comparison between the jrdg 8ti and the model 10. the former is a robust, earlier model that, IMHO, is head and shoulders above any of jeff's newer designs. as to the power cord issue: recognze the jrdg uses a female 3-prong connecter at the amp different from most other manufacturers. best find out if there's an "upgrade charge" to terminate correctly.