Ground loop Isolator on 12v line?

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tesna

Member - Posts: 5

Joined: April 01, 2006

Location: Indonesia

Posted: February 09, 2016 at 1:14 AM / IP Logged

So I have alternator whine using aux input connected my phone only when my phone is charging. I tried to hook up the line level ground loop isolator, well.. the engine noise is gone.. but the sound quality is horrible!

Rather than isolating the ground on the line level, can I install 12 V 2A 1:1 transformer on the 12v line before the charger to my phone? Or it does not work that way?

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i am an idiot

Platinum - Posts: 13,667

This member consistently provides reliable information

Joined: September 21, 2006

Location: Louisiana, United States

Posted: February 09, 2016 at 10:12 AM / IP Logged

What brand isolator did you use? Most of them are directional, there is an input and an output. Did you connect it that way? Try a Pac-audio.com SNI-1. Make notice of the input and output.

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stephieme

Member - Posts: 5

Joined: September 10, 2016

Location: California, United States

Posted: September 10, 2016 at 5:50 AM / IP Logged

What has worked for me in the past is to get a piece of bare wire and loop it around the outputs on the back of the HU then using one of the screws on the HU screw the ends of the wire to the unit. This eliminated my need for an isolater. Your situation may be different.

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i am an idiot

Platinum - Posts: 13,667

Joined: September 21, 2006

Location: Louisiana, United States

Posted: September 10, 2016 at 8:12 PM / IP Logged

He only has the problem when using AUX in. Your fix is not going to help him.

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