Is it fine to bunch together power wires?

Hi,
best way to keep them seperated or if not possible try to make the cross each other.

I avoid that.  

The biggest issue occurs when cables run parallel to each other. Crossing is not so bad, particularly at right angles. You are better off having a jumbled mess than having all the cables neatly organized running parallel, even if they are spaced a 1/2" apart. The amount of current that is induced in the neighboring cable is dependent on how much current is running through each cable, how close together they are, and for what distance. Having cables occasionally cross each other will result in a lot less induced current than running them parallel in close proximity for more than a very short distance. 

Thank all of you guys/gals for your input. Although I have a nice system and do hear subtle tweaks that I do but never tried keeping my power cords independent as possible. 

There is an art to doing the current way I have mine now, but going from now to what I have been reading here will take even MORE artistic ability. 

Something I may have to draw out on paper before I even begin. Everything goes into play with where each component sits to how long a power cord is to space in the cabinet. 

I've got lots of work to do but and the best thing about this is that...in general the costs should be FREE! YAY! 

Hopefully unless I need to buy a longer cable or something!!!

You are better off having a jumbled mess than having all the cables neatly organized.

Neatly organised is good, touching is bad. My .5, 2" numbers work very well, for NOISE. As I stated..

You shouldn't tell people that.  This isn't a Cray supercomputer, where there is an actual reason for the wires being carefully jumbled as you stated... His system would CRC because it was digital. The errors were cause because of just what you stated. Field migration from HC lines within the box.  Whopper in war games... Right..

It matters very much for noise, AS I STATED. I don't care about the gobbledygook you spouted.  The magnetic field may be affected, BUT you or I can't hear the affects of it.  At 30 db or a 140 db, in my systems. Whether through XLRs, RCAs or Speaker interconnects.

I'm pretty sure, I'd be walking out on one of your installs, because of the floor noise. I said  IC running parallel. There is NO NOISE when at least 1/2" apart, and 2" with PC. If a PC cross and IC, 90 degree, right angle, again 2" apart. They will SOUND better. Typical lineman for the county, answer, typical electrician answer. 

LOL I have a family chockablock full to the top of Union electricians. Top notch men.. They all learned one day at a BBQ.. The best of the best..
They learned about Stereo gear, the ones that could still hear anyway.

They learned about cable direction, not one started out believing it, they all did before leaving.. One made up an RCA and we tested it. Sounded better one way than other.. The spool of cable was cooked on a cooker for 3 days. live and learn, they did...

Two of the 7 actually specialize in HiFi, High Current cable installs, NOW! Go figure, they alway come to Uncle Scotty with stereo questions.

Regards