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DIY Balanced Cables

I just finishing a pair of Balanced Cables for connecting an Ayre QB-9 to an AX7e. I tried to follow Jadem6's recommendations on his 2006 thread "DIY Interconnects Review".

The cables consist of 2 feet of cotton insulated solid copper wire (from HomeGrown Audio). The active leads (2 and 3) use 3 strands of 28 gauge. The ground is on one strand of 22 gauge. I used Neutrik Connectors. The wires are stitched by sewing machine on to a 1.5 inch wide cotton band the spacing is about 5/8" with the return in the middle. The three stands are lightly twisted but not braided. There is a small bit of electrical tape securing the cotton band to the connectors. I am not concerned about fragility. I will put pictures on my system page.

I would like to try some different configurations and wire when I have the chance but would like feedback about the following things.

1. Should the wires for the signal be left untwised, or braided rather than loosely twisted?

2. All the wires run parallel. I have found this to be a problem with speaker wires but jadem6's article is pretty emphatic that straight is better. In fact, I tried a version of my magnet wire speaker wires parallel and it sounded awful (veiled, thin). They are long wires though and carrying much more current.

3. What about a Litz configuration?

If these work well, I might try Gold wire but have heard negative things about silver and silver coated copper wire. Haven't heard them yet as my speakers are in the shop being upgraded. So as soon as I get them back, I will try them. i don't have much to compare too right now though.

thanks for any feedback (except really inappropriate negative stuff)
drewh1
ckoffend
684 posts
 
Drew, when you ran your magnet wires parallel, were there in close proximity/touching each other or spaced apart?
drewh1 OP
115 posts
 
Ckoffend,

I ran them about 1 1/2" apart spaced by small blocks of wood every foot or so. They spacing remained pretty even and they were off the floor and away from most other wires and electronics. My speaker cables are 12' long due to the setup in my room.

The difference was not subtle.
lplayer
28 posts
 
Its not a good idea to leave the signal wires untwisted and parallel. They should contact each other uniformely and not be allowed to contact only areas where they happen to touch. Signal tranmsission should be continuous. Lightly twisting themis a no-no also. A true litz config would have the wires twisted uniformely and rather tight. Also, spacing between the pos and neg wires should not necessarily be very far appart. More than 1/4 inch is not needed. You are talking about interconnects correct? Not speaker wires?
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nvanderstoep
18 posts
 
If using a twisted configuration, 3-4 turns per foot is ideal. More or less can be detrimental actually. Braiding is a good way, probably the best in this situation. True Litz would also involve a conductor moving from the very center of the signal to the very outside, thus a 3 strand braid is closer to litz style than even numbered strands or twisting. My opinion is to try the braiding, it seems to have the lowest noise floor and best soundstage in my system. Of course, all systems are different!
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