Is There a Way to Lessen Vibration On Cables From Powered Speakers

First get the angles and path figured out as best you're able. Then figure out how to suspend all the cables so they are free to bounce and move. Easiest way I know is to stretch a rubber band across something so the cable lays on it kind of like a hammock. Look at mine on my system page. Hard to get a camera angle but the cable lays on the rubber band not touching the ceramic insulator at all, and if you tap it will bounce freely. This works so well I have done demos where people can hear the effect from removing just one of these. Ceramic is probably best but people have gone as cheap as cardboard and still heard improvement.  

Remember, once you get the angles right like you did then free unrestrained movement (aka, isolation) is the key.

@tomic601

" is that better or just different? "

I am not following the context here.  Are you referring to the change in angle?

@ghasley

Where does one obtain this putty?  And yes, the Audioengine A2+ are extremely well engineered. :) I think they're worth far more than they charge for them.

@millercarbon

I had these on "risers" on the desk. Are you saying that if I suspend the cables on a stretched rubberband, it will absorb the vibration? I think I accomplish that. 

Rubber bands do work they just break after awhile how do you get around that MC . 

Blu tack or more likely the gray map putty should be available at a goodoffice supply. Amazon has multiple blu tack options available.