Low-voltage wiring


Due to bad planning and impulse purchases, I've got a bunch of devices (2 Keces linear power supplies, a PC/renderer, exaSound e12 DAC, Rega turntable power supply, USB Regen, UltraCap LPS-1, fiberoptic media converter, and Bluetooth receiver) connected by 5.5-mm barrel plugs and some cheap two-conductor wiring. Voltages range from 5 to 24. I've noticed that some equipment (like the Keces LPSs) comes with ferrite beads on coaxial cable, presumably to reduce RF output and/or magnetic field generation. Should all the wiring be like this? Is this type of wiring likely to interfere with interconnects or speaker wire? I don't really hear anything, but am always interested in incremental, low-cost improvements. 

Any thoughts would be appreciated, and if there's already a thread on this topic please point me to it.


john_g
@John_g - unfortunately power cables on low voltage devices seldom get the "treatment" their power supplies deserve and I have in the past replaced those skinny little wires with something more appropriate with great results.

I’ve since replaced those components that used them with others that have a "real" power supply that takes an IC connector to avoid separate power supply issues.

Unfortunately - playing with a power supply can get you into hot water if you do not know what you are doing. If you are an electronics hobbyist or in the electrical field then you will appreciate what I am saying and therefore can make the appropriate changes in a safe manner - otherwise I would not recommend changing them.

There are companies out there that make better power supplies, so I would seek them out on the web and replace them

The do make a significant improvement

If the supplies provide a DC voltage then their impact on other cables will be minimal, but if they are AC you can have an emi/rfi issue with cables that are in close proximity and running in parallel.

Personally - I keep all my cables separate and avoid the issue completely

Hope that helps - Steve

it won't hurt to snap a ferrite core on your other wall wart power cables

there is some thinking *by the guy who designed your iso regen btw) that inductance on the wall wart cables should be as low as possible - there is a thread about how to build your own cable of that tye on computeraudiphile.c om
Thanks for the replies, randy-11 and williewonka.
You might receive more feedback at diyaudio.com or Audigon’s tech talk. Try not to lump signal (analog & digital) and power cables together. They function differently. It’s not unusual to see ferrite cores on digital cables. It’s very unusual to see them on analog. Shielding is another factor. Many variables involved. It’s pretty easy to experiment with the two wire cabling with your low voltage power supplies. The SQ will definitely will be affected. The parts are readily available online or your local electronics store.

There’s a lot of different types of wire out there - as well as different configurations for twisting & braiding. Here are examples that I’ve tried recently on my 12vdc power supplies.

#1: 20 awg 6n OCC pure solid copper
This solid-core copper offers a nice balance of tone and clean energy. My favorite so far.

#2: 20 awg silver-plated Copper Type E, 7 strand, PTFE, 600v, 200c
This 7 strand silver-plated copper is very interesting. It offers a very nice presentation for vocalists w/o any stridency. Yet, it still has clean, high energy. It’s very different from the more common wire of 20 or so strands.

#3: 20 awg silver-plated solid-core copper wire, PTFE, 600v, 200c
This silver-plated solid-core copper offers clean, high energy. But, it can be a bit much depending on the application. ymmv. For DIY experimentation, it is far more economical than pure silver.