Review of PAC Ground Loop Isolator for 3.5 MM Applications

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I don't normally write reviews, but I didn't see any for this product and took a chance on buying it, and it worked out well, so I thought I should write one.

I have an iPhone that I use to play music via the aux-in port in my Prius and there was a lot of noise in the signal, especially if the headlights were on, and this was particularly problematic if I turned the volume way up for soft music (e.g. Renaissance lute music).

With this noise filter, that problem is gone.

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I have a car stereo with an AUX-in port. Unfortunately, when my car is running and I have my iPod plugged in, I get a very obnoxious electronic whine (more noticeable during the summer at night, with the headlights on and the ac running...the more electrics running in your car, the louder the whine). It would get so bad that it would make listening to music more of an annoyance than anything.

Searching on Amazon for an auxiliary charger for my iTouch, I came across this in a "Buy these two devices together and save" item. And I am happy to say it completely eliminated all electronic whine/feedback. It could not be simpler to install...plug one end of the isolator into your AUX port, and the other end into your iPod/mp3 player/auxiliary accessory(Griffin AutoPilot FM Transmitter for iPod, Kensington LiquidAUX Auxiliary Car Kit with Remote for iPod; iPhone 1G, 3G, etc.) It works like a charm. The way it works is its circuitry isolates any ground loops in your stereo (depending upon how it was installed, you may have a bad ground and that can cause an annoying whine).

HIGHLY recommended for anyone who wants to listen to their music and charge at the same time.

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I had horrible transmission noise on my MazdaSpeed 3 when charging my iPhone 3GS and plugged in to the auxiliary port. I tried my phone in two other cars and couldn't reproduce the problem, it was definitely my car. After plugging the SNI-135 in to the auxiliary port and my phone in to the SNI-135 the transmission noise is gone completely. Definitely worth the purchase.

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This thing is awesome, I had this annoying hum when I connected by laptop to an AMP. Plug this little thing in and the audio is great now.

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I have an old school 15gig iPod which is great in the car because the buttons aren't on the click wheel. Well, the battery doesn't last anymore and everytime I played it with the battery adapter on, you could hear the whine from the alternator on acceleration. After plugging through the PAC, silence. I dare say, the music actually sounds better! Very, very satisfied.