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PAC SNI-1/3.5

3.5mm Ground Loop Noise Isolator Works W/ iPod / Zune / iRiver and Others

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List price $16.95

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$10.99

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Ground Loop Isolator

If you are like most folks, you probably hate when you plug your portable music player into the 3.5mm (headphone jack) aux input on your car stereo and get an annoying whine that interferes with music playback. Well if so, the PAC SNI-1/3.5 is the answer for you. PAC's SNI-1/3.5 preamp noise filter plugs in between your receiver's auxiliary input and your portable music player and helps reduce noise caused by ground loops. The filter includes a female 3.5mm input, a male 3.5mm output, and 10 inches of cable for each jack.

Product Features

  • Ground loop isolator
  • Close to perfect response of +/- 0.03 dB from 2-20,000 Hz
  • Utilizes proprietary audio transformers for a 1.3 dB gain
  • Female 3.5mm input
  • Male 3.5mm output
  • 10 Inches of cable for each jack
  • 1-year Manufacturer's Warranty

Product History:

PAC LPGL-2 thumbnail
(newest, current model)
PAC SNI-1/3.5 thumbnail
(previous model, replaced by PAC LPGL-2)

Noise Filter Specifications

Noise Filter Type
This designates the type of noise filter listed.

Ground Loop Isolators are connected in-line with the RCA interconnects or other audio cables.

Power Line noise filters connect to the power line of the receiver and help reduce noise from the source.

Pop Eliminator noise filters are designed to remove the "pop" that occasionally happens in some systems when the vehicle is turned on.

Ground Loop Isolator

Warranty and Return Policy

Parts Warranty Duration
1 year
Labor Warranty Duration
1 year
Warranty Provider
Manufacturer

Summary of Customer Ratings & Reviews

Rating Distribution

5 Star
75%
4 Star
18%
3 Star
5%
2 Star
0%
1 Star
3%

Average Attribution Rating

Durability
4.5
Value
4.7
Features
4.5
Design
4.2
Usability
4.9
Sean

Auburn,al

Overall
Durability
Value
Features
Design
Usability
Works well

January 7, 2014

Cheap, simple, does the job. Removed all the noise from a leaky audio input jack.

5 of 7 found this helpful

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eeast

Knoxville, TN

Overall
Durability
Value
Features
Design
Usability
Excellent perfomance: no more Alternator Squeal

August 19, 2013

The price is right and if you need a stereo-mini ground loop isolator, look no further. My Aux-in was very noisy until I used this filter. Just plug it in right before the Aux-in.

6 of 9 found this helpful

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Cliff

Santa Cruz, CA

Overall
Durability
Value
Features
Design
Usability
does what it should

November 14, 2011

The product worked perfectly in my application, totally eliminating the hum problems in my portable sound system. I purchased two more after testing the first one.

5 of 7 found this helpful

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GlobalPolygraph

Elmira, NY

Overall
Durability
Value
Features
Design
Usability
Good value but

December 21, 2011

This is the third SNI-1/3.5 I've bought, and they seem to work great for the first year or so and then the audio quality begins to get muffled and I have to buy another. I should note that I use this unit for my music input in a small (noisy) airplane, and there's lots of vibration the unit needs to deal with. So that said, it's seems to be a good unit but wouldn't recommend it in a high vibration environment.

5 of 8 found this helpful

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LM

San Mateo, CA

Overall
Durability
Value
Features
Design
Usability
eliminates static in car

October 10, 2011

I got this gadget to eliminate the bad static I heard when listening to my DroidX through the car speakers and plugged in to the car charger at the same time. Works like a charm! A friend had recommended it and it works great for him too on his iPhone.

4 of 6 found this helpful

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Jim W

Tucson, AZ

Overall
Durability
Value
Features
Design
Usability
Problem Solved!

September 25, 2011

This device eliminated the interference I experienced when I had my iPhone connected to the car's power source and sound system. It fits nicely in the console box of my 2007 Prius and plugs into the port for auxiliary devices. I plug the audio cable directly into the device. Simple. Inexpensive. Effective.

4 of 6 found this helpful

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Brian

Ohio

Overall
Durability
Value
Features
Design
Usability
Excellent product

December 11, 2012

I bought the loop for my XM radio which had horrible static. After the loop the sound quality is crystal clear.

5 of 9 found this helpful

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lmd6204

Chicago

Overall
Durability
Value
Features
Design
Usability
Works very good

September 6, 2012

I bought this filter for hooking up my smartphone to my aux input in my car's stereo system. I was getting constant very bad noise when I listened to music on Pandora through my car system (I think the noise is from the processor in my phone). This filter took almost all of the noise away and I am able to enjoy my music. I do, still, however get these little high frequencies pitches of noise which aren't so bad and I can live with them.

4 of 7 found this helpful

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Noodle

Atlanta, GA

Overall
Durability
Value
Features
Design
Usability
Handled non-standard use perfectly

June 6, 2011

I grabbed two of these to correct an issue with a custom audio network between two computers, an office phone, a cell phone, and one headset with microphone.
Understandably, this generated a lot of hum, hiss, and clicking on its own, especially when the cell was plugged into the computer to charge...
With both phone outputs run through these, there is not a single click or hum left in the sound, and the stereo separation has actually improved.
In short, these have done the seemingly impossible - highly recommended!

3 of 5 found this helpful

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G

PA

Overall
Durability
Value
Features
Design
Usability
PAC SNI-1/3.5

November 13, 2011

I had a slight buzzing noise coming from my TV after I hooked up computer speakers to it. I tried everything, then bought this. Still didn't work. Buzz is low enough that I can live with... I am rating this item ONE star only b/c it didnt fix what I bought it for. Maybe I bought the wrong item or attempted the correct a problem that isnt suppose to be fxed by this kind of product. I dont know.

3 of 6 found this helpful

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rrios28

El Paso, Texas

Overall
Durability
Value
Features
Design
Usability
Pac SNI - 1/3.5

October 31, 2011

This item removed about 60-70% of my wining engine noise that was really making it difficult to listen to my radio. After install a world of difference could be heard. Great product. Thanks!

4 of 8 found this helpful

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Russel

Fort Knox, KY

Overall
Durability
Value
Features
Design
Usability
Review

August 25, 2011

It works great. No static noise at all.

2 of 4 found this helpful

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Brett

Chicago, IL

Overall
Durability
Value
Features
Design
Usability
Does Exactly What It Is Suppose To Do

June 7, 2011

I had a ground loop noise problem in my wife's 2008 Mazda 3. Plugged this in and the noise was gone. Much easier than messing with the internal wiring.

3 of 6 found this helpful

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AmyL

San Francisco, CA

Overall
Durability
Value
Features
Design
Usability
Essential little piece of equipment

May 23, 2011

I've been doing audio demonstrations with some pretty unstable power outlets and the SNI-1/3.5 has become a required filter in my audio chain. Whether connecting up my laptop or an iPod, it pretty much eliminates all the nasty buzzing noise on the line. It's not super cheap but I have yet to find another ultra-portable filter that works as well. I ended up buying two.

2 of 4 found this helpful

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BillSTP

Santa Rosa, CA

Overall
Durability
Value
Features
Design
Usability
Works great ! Completely eliminated noise problem.

May 5, 2011

This works great! I had some terrible ground loop noise problems while using my iTouch with an FM transmitter in my truck. It was driving me crazy. This isolation transformer completed eliminated the noise. And it couldn't be easier, just plug it inline and you're good to go.

1 of 2 found this helpful

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Karl

Wesborough, MA

Overall
Durability
Value
Features
Design
Usability
The cure for satellite radio hum

May 2, 2011

My VW has an audio input which I use for my Siruis s50 sat. radio. Before using this device any acceleration / deceleration would register through my loudspeakers. With this device in between the radio and the sat device all hum was removed, however this device appears to be failing only after 6 months use.

1 of 2 found this helpful

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maria

los angeles, ca

Overall
Durability
Value
Features
Design
Usability
inline filter for mp3 to 3.5 auto speaker input

April 27, 2011

great product. fixes all my noise problems.

1 of 2 found this helpful

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Steve

San Diego, CA

Overall
Durability
Value
Features
Design
Usability
Works Great!

April 19, 2011

Had the rising and falling buzz from the engine anytime I tried to charge my iPod and listen to it at the same time. Installed the PAC SNI 1/3.5 in about 10 seconds.... problem gone. It just works.

0 of 0 found this helpful

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Mark

Culver City, CA

Overall
Durability
Value
Features
Design
Usability
Worked magically. A MUST have item.

March 15, 2011

I almost gave up on the noise coming from the audio jack of my Droid X when it's hooked to the power supply from my car. Then I found this product and it worked beautifully. Now I play music using Droid X while I'm driving without any problem. I finally succeeded in replacing my old iPod with my Android phone.

0 of 0 found this helpful

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Rob

Newport News, VA

Overall
Durability
Value
Features
Design
Usability
Works great!

March 2, 2011

I was having an issue playing music over my car stereo through my smartphone's audio out while charging, and someone recommended I get a ground loop isolator to solve the problem. I did some hunting around, but most solutions I found were for home stereos, and I didn't want to mess around with adapters.

This unit was exactly what I needed, and at the right price. It's small enough that it's not too obtrusive in a car, and more importantly, it works really well. I'd definitely recommend this to others.

0 of 0 found this helpful

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Browse 1 question and 4 answers
Hide answersShow all answers | Sort by
Why did you choose this?
Sonic Electronix Store
car issue while charging phone
nathan r on Sep 8, 2014
Had good reviews with the features i needed
Nicholas R on Aug 17, 2014
The specs were within the desired range required for the audio equipment.
Brian V on Sep 3, 2014
Ground noise on Motorcycle
Dennis V on Aug 4, 2014

Product Summary

Manufacturer

Model Number

SNI-1/3.5

Weight

0.23lbs

Internal SKU

sni135

Internal Product ID

8987

Sonic Electronix Wiring Guide

Wiring Diagram Legend

Warning: The image depicted shows the resistance change when wiring multiple subwoofer terminals. Please refer to your subwoofer's owner's manual for the proper wiring of its terminals. Sonic Electronix, Inc. is not responsible for damage caused to your audio system or vehicle due to improper installation. Please call tech support at 1-877-289-7664 if you require additional assistance.

Product Name: PAC SNI-1/3.5