I gotcha......but I have to disagree on the marantz pm14s1. I have read no where that its grainy and bright. It is actually one of their warmest amps of late. Its basically an updated version of the previous pm 15s1. I do agree however that silver cabling can sometimes be an issue with brightness, however all my components are warm, the classic sb turntable, the hana el, the marantz, and especially the wharfedales. Copper or the romex u speak of is known to be warm, so u may be on to something...although it’s the first time I’ve ever heard that suggested for a speaker cable option. All the reviews of that marantz indicate warmth, and thus far it is what I’ve experienced as well. I actually have a biwire set of audioquest type 4’s I could swap in as a test as well. The only other amps I have on hand are the rogue sphinx v2 and another marantz, the pm8006....I guess I could try either as well, when I’m feeling energetic! What a pia with all the wiring I’d have to unhook etc....lol. how did you terminate the 14g romex? Or did you just leave it bare? The marantz only has one set of speaker terminals so I’d have to get creative. Right now my qed’s are terminated with both bananas and spades on amp end to facilitate connecting to amp for biwiring. The audioquest type 4's are already terminated so I think I'll try those prior to testing with romex. Also, the type 4 has no silver content, just a combo of stranded and solid copper conductors I believe.