Isolated vs non-isolated DC converters for car audio amplification - diyAudio
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Old 3rd June 2012, 03:00 PM   #1
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Default 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.
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Old 4th June 2012, 05:38 PM   #2
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It'S just to avoid hum loops.

Best regards!
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Old 4th June 2012, 07:38 PM   #3
gmarsh is offline gmarsh  Canada
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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.
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Old 4th June 2012, 07:41 PM   #4
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Quote:
Originally Posted by gmarsh View Post
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.
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Old 10th June 2012, 07:33 PM   #5
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Default Think star grounding

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Originally Posted by Frank Berry View Post
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.
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Old 17th July 2012, 02:23 AM   #6
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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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