@kennesawjet I had pretty much all AZ cables including Wow and all the way up to Absolute Copper. As you go up the line you get a noticeable improvement in clarity, resolution and soundstage while retaining the warm sound signature. One of the best combos and values is the pairing of Silver Ref II and Matrix Ref II. As to the ARC preamps, I’ve never heard one that sounded unnatural or mechanical and I had the following preamps in my system: LS15, LS16, LS25, Ref1 and Ref6.
These were paired with various amps and speakers starting with DNA-0.5, DNA-125, DNA-225, Pass X250.5, Pass X260.8 (with Ref6). Not trying to convince you but your statement about ARC sound is a bit unusual and inaccurate in my opinion. Keep in mind, you have to have all your components on the level. These preamps are revealing and will show you what’s up and down stream. It’s likely that either the source, the amp or thd speakers you heard with ARC preamps were not up to par. A low quality digital source will make itself known thru a transparent preamp like the ones I mentioned above. So perhaps that’s what you heard…just a speculation…since we hear things differently. Your system, your ears, your room.