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Peripheral PGLI

RCA Ground Loop Isolator


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This item has been discontinued

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  • RCA Ground Loop Isolator
  • Eliminates alternator whine and ignition spikes
  • Designed with audio transformer technology
  • Great for video systems
  • Authorized Internet Dealer
  • 1-year Manufacturer's warranty

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
Number of Channels
Each channel on an amplifier will power one speaker using a positive and negative cable. There are various types of amplifiers, each designed to power a certain number of speakers. Monoblock amplifiers, also known as single channel, are designed to power one or more subwoofers. These amplifiers often have very high power ratings. On the other hand, multi-channel amplifiers power multiple speakers, usually at lower power ratings. 2-Channel and 4-Channel amplifiers can power car speakers or low powered subwoofers. Occasionally you might see a 5 or 6-channel amplifier that can power speakers and subwoofers at the same time. The most common setup is a monoblock amp to run subwoofers and a 4-channel amp to run door speakers. Check out our Knowledge Base for more information.


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Warranty and Return Policy

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

Summary of Customer Ratings & Reviews

Rating Distribution

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1 Star

Average Attribution Rating

Kevin W


Fixed Mazda/Bose issues

November 15, 2009

I recently added an aftermarket amp to my 2009 Mazdaspeed with bose. It goes without saying that bose stereos are garbage, and the signal from my stock HU to a new amp was problematic. I was getting terrible channel separation (fading fully to left or right I would still hear sound in the other channel). One of my amps had some isolation built in, but the other one didn't, and it put out horrible alternator noise. I bought a pair of Peripheral PGLI's and they fixed all the problems I had with this setup. My balance controls works like it should, and all that noise is gone. I know that people worry about loss of sound quality, but I have not been able to perceive any loss of fidelity with these installed. I strongly recommend this product, and you have little to lose with the price.

I wish the leads were a bit shorter, but the product is very solidly built. I did not have to use the brown wires; in fact when I did try them the noise came back.

6 of 7 found this helpful

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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: Peripheral PGLI