I think the cables you are listening to have high capacitance and high inductance compared with more physically open, more neutral cables on the market.
Bear in mind that your speakers (all speakers) have impedances which vary with frequency, sometimes quite dramatically. Adding ideal cables with no capacitance or inductance, but different resistances, will skew the frequency response of the speakers. Of course, no real-world cable is free from capacitance or inductance.
I wrote earlier that
Highly inductive and capacitive speaker cables will alter the tonal balance of your speakers but only you can judge if you think it is for the better or worse
I would suggest you beg, borrow or otherwise obtain a more conventional pair of cables just to compare ...
PS. In many ways, the ideal cable is no cable and I think this partly explains the performance of well executed active speakers