Too good to be true or what am I going to destroy?

I've been auditioning speaker cables for my hybrid estats powered by a SS amp. One set of cables is slighty 'too mellow' - another set is slightly 'too revealing'. I decided to experiment. On my bi-wirable speakers, I cross connected the two different sets - meaning the red from one set went to the red HF and the black went to the black LF - visa versa with the other set. These cables are radically different designs - and 2ft difference in length. Having never done this before, I was kind of hoping that I wouldn't accidentally kill my amp or my speakers. Results: They seem to have blended perfectly. So, what do I need to lookout for? This seems way to simple - simple scares me.