Making Symmetric Power Supply from Single with 4x ATX power Supply? - Page 2 - diyAudio
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Old 20th November 2012, 10:40 AM   #11
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Join Date: Aug 2012
Quote:
Originally Posted by DF96 View Post
I'm not certain you have understood what we say. Cases must be grounded, not isolated. You don't seem to have grasped the difference between the various grounds in a circuit. To be blunt, if you knew enough to do all this safely you probably would not need to ask us.
Well i can isolate case from board and ground it. Question is would this work as symmetric power source for amp? I don't have higher understanding in this matter but only some basics, that is why i asked here. I do have voltages needed (-+24v) but i am concerned about impact on the amp and sound quality...
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Old 20th November 2012, 11:51 AM   #12
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Join Date: Dec 2001
Location: South Sweden
Sound quality is the least of your worries.

Please use the word (protective) earth instead of ground in this case to point out that the potential of the case IS connected to the mains earth in the wall outlet for SAFETY reasons.

It is not sufficient to break earth connection and put the supplies in a isolated outer casing. Actually it is illegal to remove the earth connection in most countries.

You would need to have an earth connection to the case, because if somethings goes wrong the casing can come live at high voltage potential , and perhaps also the low voltage output of 12V for many reasons which there is not sufficient space here to explain (creepage, clearance, arcing, loose wires etc )

At best you will then smoke all supplies + any attached amplifier.

At worst you or someone else or more will die either due to electrocution or in the ensuing fire.

So please read through macboy and the other posts
again, think it over and be sure you understand the differences of ground, earth and why the later is there before further experiments.
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