[sdiy] Converting rack mount to DC input?

[cheater cheater]

On Sat, Jul 4, 2026 at 2:28 PM Florian Anwander via Synth-diy
<synth-diy at synth-diy.org> wrote:
>
> Maybe, it's a stupid thought, but...: could it be that a device relies on beeing galvanical separated from other devices. I this case the common supply might clash with the devices concept.

Wouldn't that require input and output transformers too? (none of my
equipment has those)

>
> Am 04.07.26 um 11:25 schrieb cheater cheater via Synth-diy:
>
> Hi all,
> Beside my head I have my mic processing rack with a bunch of preamps,
> voice strips, EQs, etc. I'm in a very quiet room, and the transformer
> buzz is audible, which is undesirable for my kind of work. I've been
> wondering if anyone ever tried converting their analog racks to DC
> input, and how that went. All the racks I'm talking about are
> internally running at +15,0,-15V rails, so I could just have a single
> linear (or even high quality SMPS) power supply, distribute it via XT
> or XLR style connectors, and have simple filter boards inside each
> unit that filter the incoming DC, with switch to disconnect the mains
> PSU and connect the DC board. I was wondering if this is a good idea
> in general and in particular how this relates to issues like ground
> loops and EMI pickup. My run from the DC power supply to the rack
> would be about 2-3 meters long, but it would be running parallel to
> some digital cabling. I would also be interested in suggestions on
> connectors to use, especially if I want to make daisy chain cables
> that go from device to device.
>
> I would appreciate suggestions / experiences on the topic.
>
> Thanks!
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