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clean, dirty power and connector plate heights from above finished floor etc.?

Hey Gang! Sorry about the bump.

If you need my details on my build etc. please see my thread here on ROG titled Small Studio Build Journey or ask here and I'll give more.

For those of you both pro and not pro, in your experiences, some quick questions (I think anyway) on the items below please:

60 cycle humm but only one power connection, I'm stumped

Hi everyone,
I'm not an audio engineer or even sure what one is but I have a problem with a humm. It happens when ever I have some audio device connected to the wall outlet. Let me explain further and see if one of you gurus sees how to fix it or at least track down the problem:

Diminishing power in my consumer electronics

Hey all, I've notice recently that at some point within the first year of use, my and even my friends, consumer electronnics power amps/speakers seem to fade or settled down a bit. Whether it so my phone, my home theater, and recently my iPad, it seems to me that it takes a couple of extra notches on the volume dial, to get bit to the comfortable level I was used to initially.

Help me pick out a power conditioner please

I'm in the market for some power conditioning rack units, maybe two of them: one for my guitar rig and one for my computer/recording rig. As it is now I have a mess of a power situation here, I'm using a lot of power strips and expansions and it's all going to the same outlet, guitar rig, recording rig, and computer.

PreSonus Firestudio Project - Needs power supply schematic

Asking on behalf of a fellow member on another electronics repair forum. He seems to have a bad a resistor that is some type of 1/4 resistor that is right beside the bridge rectifier. Obviously, these new types of schematics are tough to come by... However, the year of the device is 2007 and all that is really needed is the value of this resistor.