Thanks all for the replies

Cable Asylum

Interconnects, speaker wire, power cords. Ask the Cable Guys.

In Reply to: Cable for DC power? posted by mitch2 on February 11, 2023 at 00:38:42:

Thank you all. I have been out of town and just got back to this. I did learn from your responses but I am still wondering "why" certain DC cable configurations might sound better or reduce noise.

My SMc Audio preamp/buffer uses a special DC cable made by Gary Koh, which uses proprietary wiring and Neutrik's powerCON connectors to connect the outboard choke power supply (same as SMc VRE-1 supply) to the preamp unit. I can understand how this might be a more important function since it is powering the active preamp functions vs. my current situation where the DC power is only powering items not in the signal path of my AVC preamp - i.e., the display and the relays (or FETs) used in the remote volume control process. Maybe the fact that the manufacturer of my AVC unit used a cheap wall wart indicates the DC power is not that important for the function/sound of the preamp. I only switched it to a linear supply because I didn't want the wall wart plugged into the same circuit as my audio equipment.

The wire I am using (harvested from a Dell computer power supply) from my linear supply to the AVC passive preamp is a simple coaxial cable. The DC cable on the cheap wall wart that came with the AVC preamp is simply two very thin side-by-side wires. If my goal is to limit EMI/RFI, is there a configuration that should work best, such as coaxial, side by side, shielded or not, something else? Silver seems to be a popular choice for DC cables and for around $100 the linked Viborg option might work just fine. BTW, my cable needs the GX16-2 connector on one end, which is what I added to the Dell computer PS cable.

Viborg silver DC cable (Open in New Window)

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Follow Ups Full Thread

Topic - Cable for DC power? - mitch2 00:38:42 02/11/23 (10)

Late to the party, but... - E-Stat 13:15:02 03/03/23 (0)

Thanks all for the replies - mitch2 07:31:16 02/18/23 (0)

RE: Cable for DC power? - el34eh@yahoo.com 16:31:12 02/11/23 (0)

RE: Cable for DC power? - Jonesy 12:43:20 02/11/23 (0)

RE: Cable for DC power? - old guy 42 09:12:55 02/11/23 (0)

Have you done a search here? - 1973shovel 09:00:58 02/11/23 (4)

RE: Have you done a search here? - paco 00:33:54 02/12/23 (3)

"2 runs as a whole" - 1973shovel 07:03:41 02/12/23 (2)

RE: "2 runs as a whole" - paco 09:05:46 02/12/23 (1)

Ok, thanks (nt) - 1973shovel 17:50:48 02/12/23 (0)

Follow Ups

Thanks all for the replies - mitch2 07:31:16 02/18/23 (0)

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