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-   -   Isolated vs non-isolated DC converters for car audio amplification (http://www.diyaudio.com/forums/power-supplies/213804-isolated-vs-non-isolated-dc-converters-car-audio-amplification.html)

Stonner 3rd June 2012 03:00 PM

Isolated vs non-isolated DC converters for car audio amplification
 
Hi everybody,

I just want to know why the car amplifiers uses isolated DC converter instead non-isolated coverter, there is any reason for this?

Thanks.

Kay Pirinha 4th June 2012 05:38 PM

It'S just to avoid hum loops.

Best regards!

gmarsh 4th June 2012 07:38 PM

Safety also, having separate audio/power grounds means that the amplifier won't try to pull 100A through the RCA grounds if the power ground comes loose.

Frank Berry 4th June 2012 07:41 PM

Quote:

Originally Posted by gmarsh (Post 3048161)
Safety also, having separate audio/power grounds means that the amplifier won't try to pull 100A through the RCA grounds if the power ground comes loose.

That is a truly great answer! Accurate too.

DCPreamp 10th June 2012 07:33 PM

Think star grounding
 
Quote:

Originally Posted by Frank Berry (Post 3048166)
That is a truly great answer! Accurate too.

Similar to a home amplifier with a "star" grounding scheme emanating from the ground at the filter caps, think of an entire car as the wiring inside a home amp, only with the car's battery as the center of the star. The previously mentioned safety and ground-loop avoidance all works around the principal of all currents originating at the battery and fanning out to all the various systems and subsystems in the car.

Hadighorbani 17th July 2012 02:23 AM

hello dear friend
my name is Hadi from iran
i want to creat my own car amplifier but can not to creat smps for that.
i see in diy site you do that in past.
can you please help me to creat a good smps?
sory for my bad english
my email adress is Hadi_ghr_e_61@hotmail.com
very thanks for your helping.
have a nise day dear friend.


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