PAC SNI-1 RCA Ground Loop Noise Isolator Zoom Front Video loading and will display in just a moment. Photos Videos My vehicle's homepage We don't check this item for fit or compatibility. Item# 127SNI1 offer details Item# 127SNI1 Review Sumary 30 people say In Stock Free Crutchfield lifetime tech support Free Shipping Your price $14.99 Add to cart + Add to wishlist | Email me alerts for this product See related offers and ways to save Special Financing Available Overview Details Customer Reviews Category Info Our take on the PAC SNI-1 The SNI-1 preamp noise filter plugs in between your receiver's preamp outputs and your amplifier. Hands-on research from the Crutchfield Labs (what are the Labs?) What’s in the box? | In-depth notes Product Research Product Research What's in the box? Download owner's manual Noise filter w/ 8" RCA in/out leads (1 pair male inputs/1 pair female outputs) Our Product Research Team At Crutchfield, you'll get detailed, accurate information that's hard to find elsewhere. That's because we have our own in-house Product Research team — they open the box, verify contents, check the owner's manual, and record dimensions, features and specs. We stay on top of new products and technologies to help people make informed choices. Features Use when noise is caused by ground loop through patch cords Brown wire is optional ground Plugs in a head unit end of RCA cables Provides 1.3dB of signal gain to compensate for any signal loss that may occur due to additional connections in the signal path Product Reviews Review this product Thanks for taking the time to share your experiences about this product. Please be sure to focus your comments on the product itself. Read our Review Guidelines for more information. Review title * Email * Please include your email* Please enter a valid email address. Your email won't be visible Display name (e.g., JohnD) Your review will be signed using the display name and location * Your location * Please include your location (e.g., Charlottesville, VA) * Your rating * Please select a rating Click on a star to rate the overall product on a scale of 1-5 1500 characters left * Your review * Please write your review * Please limit comments to 1500 characters Attach a YouTube Review Crutchfield Video Review Guidelines Only submit videos that you made or are authorized to use. Do not submit videos that contain music, video or visuals that are copyrighted and belong to someone else. Please see our Review Guidelines for more information. Submit the URL of your YouTube™ video review or product demonstration. e.g., http://www.youtube.com/v/o79TWHh598U 500 characters left Pros * Please limit comments to 500 characters 500 characters left Cons * Please limit comments to 500 characters * Agree to Terms By checking this box you agree your review becomes the property of Crutchfield, that you are over 18 years of age, that you own or have owned this product, and that you are located within the United States or its territories. Please see our Review Guidelines for more information. We reserve the right (but are not obligated to) review all submissions and edit or remove any review in any manner which we deem necessary. Your review should be posted within seven days. Submit Share this product 1-10 of 30 items >> 10 Per Page 20 Per Page 50 Per Page Sort Results By: Date Reviewed | Rating | Helpfulness 5 out of 5 RCA Gound Loop Isolator Written By Nicky C, Llano, TX on Sunday, February 12, 2012 Had a problem with new receiver making a popping sound when changing tracks on the CD Player. These took all the noise out, and they were easy to install. Was this review helpful? Yes | No 5 out of 5 Ah, just what I was looking for Written By DanielC, Sausalito, CA on Wednesday, January 25, 2012 What started as a simple plan to improve my car's sound system began to unravel as a stressful, time-consuming tasks with more than I can ask for. Recently, I installed a Kenwood KDC X395 headunit along with a new subwoofer and amp. After the installation was complete, to my disdain, there was very noticable humming and alternator noise coming through the speakers. The car audio shop pretty much told me I would have to bear with the noise in a polite way. So I did, for two weeks until I could not bear it any longer. That's when I called in to Crutchfield to help me resolve my specific problem. The customer service rep layed out my options for me, with me ultimately deiciding to take the ground loop isolator route. Based on the previous reviews, I was uncertain about the efficency of this product. Preparing myself for the worst, I set a low expectation that this product to work only partially or not at all. To my surprise, it completely took out all unwanted noises. All I did was disassemble my center console, connected to head unit, reattached my center console taking me less than 20 minutes. Now my audio system is officially complete, accompianied by zero interference, and I am able to fully appreciate the clean sound I have been delayed for so long. Pros: Resolved my alternator whine, hum, and miscellaneous noise. Quick and easy install. Cons: I have nothing to complain about. Was this review helpful? Yes | No 3 out of 5 Sub pops? This eliminates it, but......... Written By Brice, Phoenix, Az on Thursday, November 17, 2011 This units says that it adds 1.3 dB of gain. Honestly, I hate to say it is a lie, but it actually cut my gain by what seemed to be half. My sub went from "awesome thumping" to " gentle bass" as soon as I installed it. As a sanity check, I un-installed and reinstalled it 4 times and compared the sound output each time, same song, same settings. Yup, definitely a decrease in the sound. Needless to say, I will not be installing it. My sub came with a remote gain control and I found out that you can just turn it all the way down before each circumstance above, to avoid the popping. I might even send in my sub to the MFG to have them adjust it for FREE. Pros: I had an annoying pop from my powered sub every time that I would turn off my stereo, turn on my stereo, switch input sources (CD, USB, Radio, etc.), volume from 1 to 0, and volume from 0 to 1. It was pretty disturbing. I installed this unit and BAM the popping was never heard of again. Cons: It cut my signal gain, regardless of what it says (adds 1.3dB). Was this review helpful? Yes | No 5 out of 5 Works as described Written By Ivan T., SLC, UT on Thursday, November 17, 2011 This is just a band-aid for the problem but it does work and it works GREAT! I needed 2 of them for my car and as soon as I installed them the sound got as crisp as it could be. I have a 96 Nissan Maxima with the stock BOSE system in it. Upgraded the HU to Kenwood Excelon x595. The HU is awesome and it works great. however, I got some noise from the alternator when the car is started. The PAC SNI-1 units took care of that in an easy and lazy way. My problem was probably with the actual ground connections but to make them better it required a lot of work. The SNI-1 did it for me and I am happy of the results. Pros: Works great and I got a good price for it Cons: n/a Was this review helpful? Yes | No 5 out of 5 FINALLY GOT RID OF THAT ANNOYING ALTERNATOR WHINE! Written By Ray, New York, New York on Thursday, November 03, 2011 I installed this PAC SNI-1 RCA Ground Loop Noise Isolator in my wife's near-classic 1990 Toyota Celica GT-S as soon as I received this product in the mail. After following the Crutchfield flowchart for isolating the source of the alternator whine, I narrowed my focus down to the patch cables connecting the subwoofers to the amp. This little device completely eliminated that annoying alternator whine! I did notice that the subwoofers lost some of their "thump" and bass quality after installation, but I simply went to the amp and adjusted the subwoofer gain controls upward slightly. And - VOILA! Our music is rich, clear, and enjoyable again! Pros: Easy plug and play installation. Was this review helpful? Yes | No 2 out of 5 eliminates noise, but also devastrates output! Written By DMB2STEP, Wells, MN on Friday, September 16, 2011 This product came in nice packaging, and felt pretty solid. I was going to use it with the intention of killing a nasty hum &bumping noise I was getting out of my subwoofers everytime i changed sources on the HU or skipped through CD tracks. Well this thing killed the noise alright, but it also lowered my subwoofers output about 75%!!! Called product manufacturer and they claim this product is not intended to be used on a subwoofer line, so be aware before you purchase. Was this review helpful? Yes | No 5 out of 5 10 minutes to perfection Written By Gabrial, Winnipeg, MB on Friday, August 05, 2011 Like the title says, 10 minutes to perfection. I purchased a used car with a very badly installed sound system. After correcting the mistakes of the previous installer, there was still a bad alternator whine whenever the engine was on. 5 minutes to remove my center console, shift knob and dash console, 2 minutes to hook the rca's into the isolators (one set each for rears and front, will order another when it comes to adding sub), and hook the isolator into the head unit, and 3 minutes to double check all of my connections and put my consoles back together and no more alternator whine. Best money I've ever spent in my life. Was this review helpful? Yes | No 5 out of 5 PAC SNI-1 Written By , cincinnati,oh on Wednesday, June 29, 2011 Worked great & easy to install had my doubt's but it removed all my noise from speakers. Was this review helpful? Yes | No 5 out of 5 PAC SNI-1 Written By , Centerton, AR on Wednesday, June 01, 2011 It was easy to install and it removed ALL the noise from both my speakers and my subs. Works perfect. Was this review helpful? Yes | No 5 out of 5 Very good product Written By Mack, New Orleans on Wednesday, June 01, 2011 I had an annoying pop coming through my woofer every time I changed sources on my head unit, radio, CD, DVD etc. When I installed the PAC SNI-1 it silenced that pop completely. Very easy to install thanks to Crutchfield support. Was this review helpful? Yes | No 1-10 of 30 items >> Learn more about Noise Filters Learn more about Noise Filters How to Choose a Noise Suppressor How to Choose a Noise Suppressor Crutchfield Writing Team 8/12/2009 based on 39 ratings (4 comments) Noise can be introduced into your system from a number of sources. Find out how to track down and reduce or eliminate noise in your car audio system. How To Diagnose and Suppress Noise How To Diagnose and Suppress Noise Crutchfield Writing Team 7/26/2010 based on 8 ratings A diagram to help you diagnose and cure the most common noise problems associated with outboard amplifiers. Noise Suppression Guide Noise Suppression Guide Crutchfield Writing Team 9/30/2004 based on 63 ratings (22 comments) A guide to solving noise problems in your vehicle's audio system. Noise Suppressor FAQ Noise Suppressor FAQ Crutchfield Writing Team 6/16/2003 How can I stop the annoying "thump" I get when turning on my stereo? Is it possible to have noise in my stereo even if I don't have a separate amplifier? My friend's system has a lot of noise. How do... Portable player + aux jack = unwanted noise? Portable player + aux jack = unwanted noise? Zak Billmeier 5/14/2008 I put in a plug-and-play satellite radio recently, connecting it to my Dual XHD-6425 head unit through its aux input. With channel guide in hand, I began flipping stations in earnest, ready to... Visit our Learning Center to learn more about Noise Filters For a more in-depth review and enhanced detailed information on the PAC SNI-1, please visit the Crutchfield website product page (/ISEO-rccbcspd/p_127SNI1/PAC-SNI-1.html ). close X Can we help you find something or answer a question? Chat with a Crutchfield advisor or call 1-800-320-6609. Chat
Our take on the PAC SNI-1 The SNI-1 preamp noise filter plugs in between your receiver's preamp outputs and your amplifier.
Hands-on research from the Crutchfield Labs (what are the Labs?) What’s in the box? | In-depth notes Product Research Product Research What's in the box? Download owner's manual Noise filter w/ 8" RCA in/out leads (1 pair male inputs/1 pair female outputs) Our Product Research Team At Crutchfield, you'll get detailed, accurate information that's hard to find elsewhere. That's because we have our own in-house Product Research team — they open the box, verify contents, check the owner's manual, and record dimensions, features and specs. We stay on top of new products and technologies to help people make informed choices. Features Use when noise is caused by ground loop through patch cords Brown wire is optional ground Plugs in a head unit end of RCA cables Provides 1.3dB of signal gain to compensate for any signal loss that may occur due to additional connections in the signal path
5 out of 5 RCA Gound Loop Isolator Written By Nicky C, Llano, TX on Sunday, February 12, 2012 Had a problem with new receiver making a popping sound when changing tracks on the CD Player. These took all the noise out, and they were easy to install. Was this review helpful? Yes | No
5 out of 5 Ah, just what I was looking for Written By DanielC, Sausalito, CA on Wednesday, January 25, 2012 What started as a simple plan to improve my car's sound system began to unravel as a stressful, time-consuming tasks with more than I can ask for. Recently, I installed a Kenwood KDC X395 headunit along with a new subwoofer and amp. After the installation was complete, to my disdain, there was very noticable humming and alternator noise coming through the speakers. The car audio shop pretty much told me I would have to bear with the noise in a polite way. So I did, for two weeks until I could not bear it any longer. That's when I called in to Crutchfield to help me resolve my specific problem. The customer service rep layed out my options for me, with me ultimately deiciding to take the ground loop isolator route. Based on the previous reviews, I was uncertain about the efficency of this product. Preparing myself for the worst, I set a low expectation that this product to work only partially or not at all. To my surprise, it completely took out all unwanted noises. All I did was disassemble my center console, connected to head unit, reattached my center console taking me less than 20 minutes. Now my audio system is officially complete, accompianied by zero interference, and I am able to fully appreciate the clean sound I have been delayed for so long. Pros: Resolved my alternator whine, hum, and miscellaneous noise. Quick and easy install. Cons: I have nothing to complain about. Was this review helpful? Yes | No
3 out of 5 Sub pops? This eliminates it, but......... Written By Brice, Phoenix, Az on Thursday, November 17, 2011 This units says that it adds 1.3 dB of gain. Honestly, I hate to say it is a lie, but it actually cut my gain by what seemed to be half. My sub went from "awesome thumping" to " gentle bass" as soon as I installed it. As a sanity check, I un-installed and reinstalled it 4 times and compared the sound output each time, same song, same settings. Yup, definitely a decrease in the sound. Needless to say, I will not be installing it. My sub came with a remote gain control and I found out that you can just turn it all the way down before each circumstance above, to avoid the popping. I might even send in my sub to the MFG to have them adjust it for FREE. Pros: I had an annoying pop from my powered sub every time that I would turn off my stereo, turn on my stereo, switch input sources (CD, USB, Radio, etc.), volume from 1 to 0, and volume from 0 to 1. It was pretty disturbing. I installed this unit and BAM the popping was never heard of again. Cons: It cut my signal gain, regardless of what it says (adds 1.3dB). Was this review helpful? Yes | No
5 out of 5 Works as described Written By Ivan T., SLC, UT on Thursday, November 17, 2011 This is just a band-aid for the problem but it does work and it works GREAT! I needed 2 of them for my car and as soon as I installed them the sound got as crisp as it could be. I have a 96 Nissan Maxima with the stock BOSE system in it. Upgraded the HU to Kenwood Excelon x595. The HU is awesome and it works great. however, I got some noise from the alternator when the car is started. The PAC SNI-1 units took care of that in an easy and lazy way. My problem was probably with the actual ground connections but to make them better it required a lot of work. The SNI-1 did it for me and I am happy of the results. Pros: Works great and I got a good price for it Cons: n/a Was this review helpful? Yes | No
5 out of 5 FINALLY GOT RID OF THAT ANNOYING ALTERNATOR WHINE! Written By Ray, New York, New York on Thursday, November 03, 2011 I installed this PAC SNI-1 RCA Ground Loop Noise Isolator in my wife's near-classic 1990 Toyota Celica GT-S as soon as I received this product in the mail. After following the Crutchfield flowchart for isolating the source of the alternator whine, I narrowed my focus down to the patch cables connecting the subwoofers to the amp. This little device completely eliminated that annoying alternator whine! I did notice that the subwoofers lost some of their "thump" and bass quality after installation, but I simply went to the amp and adjusted the subwoofer gain controls upward slightly. And - VOILA! Our music is rich, clear, and enjoyable again! Pros: Easy plug and play installation. Was this review helpful? Yes | No
2 out of 5 eliminates noise, but also devastrates output! Written By DMB2STEP, Wells, MN on Friday, September 16, 2011 This product came in nice packaging, and felt pretty solid. I was going to use it with the intention of killing a nasty hum &bumping noise I was getting out of my subwoofers everytime i changed sources on the HU or skipped through CD tracks. Well this thing killed the noise alright, but it also lowered my subwoofers output about 75%!!! Called product manufacturer and they claim this product is not intended to be used on a subwoofer line, so be aware before you purchase. Was this review helpful? Yes | No
5 out of 5 10 minutes to perfection Written By Gabrial, Winnipeg, MB on Friday, August 05, 2011 Like the title says, 10 minutes to perfection. I purchased a used car with a very badly installed sound system. After correcting the mistakes of the previous installer, there was still a bad alternator whine whenever the engine was on. 5 minutes to remove my center console, shift knob and dash console, 2 minutes to hook the rca's into the isolators (one set each for rears and front, will order another when it comes to adding sub), and hook the isolator into the head unit, and 3 minutes to double check all of my connections and put my consoles back together and no more alternator whine. Best money I've ever spent in my life. Was this review helpful? Yes | No
5 out of 5 PAC SNI-1 Written By , cincinnati,oh on Wednesday, June 29, 2011 Worked great & easy to install had my doubt's but it removed all my noise from speakers. Was this review helpful? Yes | No
5 out of 5 PAC SNI-1 Written By , Centerton, AR on Wednesday, June 01, 2011 It was easy to install and it removed ALL the noise from both my speakers and my subs. Works perfect. Was this review helpful? Yes | No
5 out of 5 Very good product Written By Mack, New Orleans on Wednesday, June 01, 2011 I had an annoying pop coming through my woofer every time I changed sources on my head unit, radio, CD, DVD etc. When I installed the PAC SNI-1 it silenced that pop completely. Very easy to install thanks to Crutchfield support. Was this review helpful? Yes | No
Learn more about Noise Filters Learn more about Noise Filters How to Choose a Noise Suppressor How to Choose a Noise Suppressor Crutchfield Writing Team 8/12/2009 based on 39 ratings (4 comments) Noise can be introduced into your system from a number of sources. Find out how to track down and reduce or eliminate noise in your car audio system. How To Diagnose and Suppress Noise How To Diagnose and Suppress Noise Crutchfield Writing Team 7/26/2010 based on 8 ratings A diagram to help you diagnose and cure the most common noise problems associated with outboard amplifiers. Noise Suppression Guide Noise Suppression Guide Crutchfield Writing Team 9/30/2004 based on 63 ratings (22 comments) A guide to solving noise problems in your vehicle's audio system. Noise Suppressor FAQ Noise Suppressor FAQ Crutchfield Writing Team 6/16/2003 How can I stop the annoying "thump" I get when turning on my stereo? Is it possible to have noise in my stereo even if I don't have a separate amplifier? My friend's system has a lot of noise. How do... Portable player + aux jack = unwanted noise? Portable player + aux jack = unwanted noise? Zak Billmeier 5/14/2008 I put in a plug-and-play satellite radio recently, connecting it to my Dual XHD-6425 head unit through its aux input. With channel guide in hand, I began flipping stations in earnest, ready to... Visit our Learning Center to learn more about Noise Filters
How to Choose a Noise Suppressor How to Choose a Noise Suppressor Crutchfield Writing Team 8/12/2009 based on 39 ratings (4 comments) Noise can be introduced into your system from a number of sources. Find out how to track down and reduce or eliminate noise in your car audio system.
How To Diagnose and Suppress Noise How To Diagnose and Suppress Noise Crutchfield Writing Team 7/26/2010 based on 8 ratings A diagram to help you diagnose and cure the most common noise problems associated with outboard amplifiers.
Noise Suppression Guide Noise Suppression Guide Crutchfield Writing Team 9/30/2004 based on 63 ratings (22 comments) A guide to solving noise problems in your vehicle's audio system.
Noise Suppressor FAQ Noise Suppressor FAQ Crutchfield Writing Team 6/16/2003 How can I stop the annoying "thump" I get when turning on my stereo? Is it possible to have noise in my stereo even if I don't have a separate amplifier? My friend's system has a lot of noise. How do...
Portable player + aux jack = unwanted noise? Portable player + aux jack = unwanted noise? Zak Billmeier 5/14/2008 I put in a plug-and-play satellite radio recently, connecting it to my Dual XHD-6425 head unit through its aux input. With channel guide in hand, I began flipping stations in earnest, ready to...
