I ordered the Double Helix speaker cables (with the 'Plus' treatment [cryo?]). I had no need or desire to return them. I just love them. They are a bit odd looking, decidedly non-high-end looking in fact.
I've had speaker cables in my system that retail from $2000 to $3300, and I think the $500 Double Helix Plus speaker wire beats them all. Flat out.
My pre-amp and amps are tubed; so, I don't know if that makes any difference to the result.
Note: I have no interest in Mapleshade, no personal or financial connection to Mapleshade or its employees.