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Power for O2+Dac?

post #1 of 5
Thread Starter 

So this is just an idea I had.... Does anyone know if it would it be possible to get a connector for my corsair axi860 psu that would power the O2 amp through its normal power plug? The included power supply (from mayflower) is a class 2 PS with an output of 12VAC @ 200mA. 

What I want to do is build the O2 into the front of the computer without any external wiring (just powered by my psu, and connected to an internal USB header).

The benefits for me are twofold: cleaner power for the amp, ( I get pops and crackles from power jitters in my building) and a cleaner desk.

My O2 has rear power, so it would be really easy to build it into my case.

If anyone has any tips or thoughts it would be appreciated.

 

Thanks,

Elliott35

post #2 of 5
Quote:
Originally Posted by elliott35 View Post
 

So this is just an idea I had.... Does anyone know if it would it be possible to get a connector for my corsair axi860 psu that would power the O2 amp through its normal power plug? The included power supply (from mayflower) is a class 2 PS with an output of 12VAC @ 200mA. 

What I want to do is build the O2 into the front of the computer without any external wiring (just powered by my psu, and connected to an internal USB header).

The benefits for me are twofold: cleaner power for the amp, ( I get pops and crackles from power jitters in my building) and a cleaner desk.

My O2 has rear power, so it would be really easy to build it into my case.

If anyone has any tips or thoughts it would be appreciated.

 

Thanks,

Elliott35


It's much more work than you realize.  The O2 was built to use an AC adapter.  You're only going to get DC through a computer's power supply.  Even if you figured out a way to bypass the rectifiers in the O2, you'd still be powering it with your computer's power supply, which is just about the worst thing you can use to power audiophile equipment.  You may get more noise than before.

 

The AC adapter is rectified to DC within the O2, then sent through a regulator and batteries.  I doubt seriously that you would be hearing pops and crackles because of your power - the O2 should be filtering them out.  Just speaking from experience, the pops and crackles may be a result of your O2's builder, not the line power in your building.  Or, you have it placed next to a particularly noisy environment (computer, monitor, cell phone, etc.).


Edited by tomb - 2/8/15 at 1:17pm
post #3 of 5
Thread Starter 

I dont think its ambient interference. For example, if I turn a fan on that is connected to the same circut as the O2 I can hear it pop. 

 

I was convinced out of the case mod over in LTT forums... You are correct AC-DC power problems also the PSU cant give the proper voltage. 

 

Other thread can be found here http://linustechtips.com/main/topic/306803-power-for-o2dac/

post #4 of 5

For that combination the O2 is AC powered, but the ODAC is powered from the USB bus.

I would suggest any power related glitches are on the computer/USB power side, not the O2 side.

You could try isolating the DAC power and adding another 5V dc power to it.

post #5 of 5
I modified a very small USB hub (1 in, 2 out) such that The input connects all but the power wire. The first input connects all wires, and jumpers its power wire to the input jack pin. This gets connected to a USB phone charger battery, providing nice clean dc power. The last port connects to the dac. My setup requires an apple connection kit for mobile use. When using it with a computer, the battery provides the power instead of the PC. I can provide pics if you want. It requires soldering skill, but much.
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