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BC in SB
2025-08-29 14:28:38
I just finished a massive stereo upgrade in my truck that included ripping out the ENTIRE interior, installing sound deadening materials and re-wiring everything. I installed a high-end touch screen head unit, component speakers up front, coax in back, wired up for a sub (to be installed later) and included an Infinity Reference Series amp. The first time turning it on I was so thrilled with the way it sounded! I spent a few hours tweaking and adjusting the inputs and levels to get it just right. What an upgrade to the factory system!Until I turned on the engine...All of the awesomeness disappeared in a flash when I heard the loud hiss and whirring noise in the background as soon as I started the engine. I felt like all my effort was for nothing... I pulled a bunch of things apart, testing various connections and ensuring that I had good grounds everywhere, etc. After a couple of hours of swapping cables and trouble-shooting (including testing voltages across various ground points, etc) I finally gave up and decided to "punt" and install ground loop isolators. These are usually a "last resort" because they typically attenuate the signal coming from the head unit and there is a discernible loss of sound quality in higher end systems.After a bit of research I decided on these PAC units - mostly because of positive results being reported, but also because of their reasonable price (some other units I considered were $50 each).They took just a few minutes to install to the head unit and I hesitatingly turned the stereo on (without the engine) expecting to hear a dramatic loss in sound quality. I was THRILLED to find that I could not tell the difference with the typical music I listen to (reggae, jazz, classic rock). I didn't even need to tweak to EQ to maintain the natural sound I had before.This seems to be one of those rare cases where the manufacturer's marketing hype actually seems true - they totally eliminated my engine noise without creating a discernible change in sound quality.
Debbie
2025-08-28 12:33:21
Worked great. Price was right
James D.
2025-08-10 10:29:58
Solved the ground loop issue I faced when installing an Atoto F7WE via preamp outputs to the factory pioneer amp in my son's ES300. Definitely worth the investment.
SLC Reviews
2025-07-27 15:18:33
I purchased a small, 40w amplifier to drive the two rear 6x9" speakers, each in their own enclosure, in my '85 El Camino. The amp was mounted under the passenger seat, and I ran a 6' or 8' rca type phono cable from the Alpine AM/FM CD player's preamp outputs to the 40w amp, under the carpeting. The phono cable I used apparently was not very shielded- it was from my home stereo system so did not have to be. The rear amp worked fine and sounded great, until I started up the car and went for a test drive, where I was disappointed to hear squealing and popping coming for the rear speakers. The front speakers played fine like they always had. I did some more troubleshooting and determined that noise was most likely coming in via my unshielded phono cables, which I did not want to remove. I did some research and came across this noise isolator, and decided to give it a try as it was fairly inexpensive. The long and short of it was that it worked and I have a normal sounding stereo. I did have to connect the two wires to each other and then to ground. Also, the noise isolator needs to be mounted at the remote amplifier, not near the deck, which makes sense since the noise is coming through the phono cable. That being said, the rca connectors will not work without having some adapters to change the sex of the plugs/ jacks around, since they are reversed from what they need to be. That is why I did not give it 5 stars. I am guessing that most folks would have problems similar to what I did due to using poorly shielded phono (RCA) cables between the deck and the remote amp.
Troy Art
2025-07-17 10:08:19
Used it on a video game and it sounds better, less buzz etc.
MK408
2025-07-13 14:55:47
I used this to fix an issue I had with speaker thump/pop when I power off my aftermarket car stereo. I connected it to the subwoofer-out RCA connector of the stereo. I also have a 12v to 5v step down converter but that wasn't enough to fix the pop. My car is a 2007 Mustang GT with Shaker 500.
Gordon
2025-07-07 10:11:32
It cut out like 30% of my loop noise but it also cut 30% of my signal level coming from the line out on my stereo so umm honestly not sure if it should even get 3 stars but not completely sure if its the device fault or not.
Brad Davis
2025-06-26 14:23:02
Completely removed alternator whine.
Philou1789
2025-05-06 13:28:29
Utiliser pour filtrer une boucle de masse sur les prise audio Rca d’une super famicom, absolument aucun effet
Cliente
2025-04-26 20:56:14
Es muy fácil de instalar y funciona perfectamente, eliminando el zumbido de tierra.
Beni Heinrich
2025-03-28 13:21:00
Hatte übelstes Pfeifen in meinem Ducato Bus mit ordentlich Musik drin, hab das Teil direkt an den Audoradio angestöpselt und von dort aus in die Endstufe. Es ist endlich RUHE ......kein Pfeifen mehr, absolute Stille wenn die Musik auf Pause ist, kein Pfeifen mehr beim Gas geben. Die 2 braunen Masse Kabel hab ich nicht anschließen müssen. Bin sehr zufrieden !!
Vinay TM
2025-02-09 15:30:56
1. Excellent delivery- ordered Thursday received Monday! Kudos to seller to dispatch this ASAP2. Works 100%- be sure to diagnose the issue first. I found that my head unit was giving a strange clicking noise when the engine was running in the front speakers but not rear. Put in the filter in between the head unit and amp and voila pure silence. No hiss no click nothing. In fact there used to be some strange clicks at times while driving even those have stopped.I recommend putting these in between your source and amps as it offers complete isolation and only the audio goes to the amp. Totally recommended.We spent a lot of time diagnosing this and had to come to a point where I was thinking about replacing my head unit but this saved me
Nestor
2025-01-16 20:32:48
Avevo usato due modelli prodotti da marchi famosi....senza risolvere il problema del ronzio appena si accendevano i fari.....invece ho risolto con questo prodotto spendendo anche 3 volte meno... complimenti al produttore.
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