Worked perfectly I also recommend taking a small wire and wrapping it around your rca outputs on the head unit and grounding it on the closest screw. it took away all noise from head unit static and the engine rpm

I used 2 of these in my car. I have 2 amplifiers powering a sub and 2 sets of component speakers. I was getting engine whine in my speakers. I hooked these up at the amplifiers and it killed the noise and did not effect the sound at all. These work great.

GREAT ITEM, GREAT COST, WORKS GREAT. After I installed my kenwood 4 channel amp ran to my door speakers i acquired a whinning humming sound that went along with the tone of the motor. I installed a new head unit for different reasons and it seemed to had gotten worst. I looked for options and came upon this and after the 20 seconds it took me to hook it up my problem was gone! I love it, money well spent.

This product works great for what it is. It got rid of all the annoying wining from radio interference. But i was also under the impression that eliminates engine noise as well. it doesn't! It's not too big of a deal because the noise doesn't bother me. But if you're buying this for engine noise think again!

This is the best noise filters /i've ever used. i was having trouble with my car system too much noise when car running and that because I ran wires seperate from power and away from ground. I recommend it if you are experiencing this problem

I've got this on both 4 channel amps and my three sub amps. What a difference it not only stops the high pitched wining it cleans up the entirety of the sound all together.

I purchased 3 PAC SNI-1 ground loops for my 2005 Corvette. One for front, one for rear, and one for subwoofer and hooked them up close to the amplifier. I was getting a lot of loud whine and they took 100% of the whine away. Great product at a very reasonable price. AND they WORK!

This product help me stop engine noise in my system. I will recommend this product to other people that want to stop engine noise from their system.

Does exactly what it's supposed to do, plugged it in and and the buzzing/ticking sound went completely away!

I had allot of noise and this item fixed it completely. It is also a lot cleaner in sound quality, but it decreases volume.

Item was very useful and reasonable priced. Thank you.

To make a long story short, I hooked it up and there was no more alternator whine. I'm not quite sure what the brown wires are for, but I just hooked it up to my RCA's and then to the amp and it worked perfectly.

I bought several of these to break the ground loops between a computer, a DVD player and a sound board at our church. Was easy to install and took the 60 Hz hum out of the sound system completely. Next will be trying one between the sound system and an HD Video Recorder. The company was quick to ship the products, also.

This noise filter fixed all my engine whine problems with my amplified door speakers. Also gave speakers a boost in loudness and clarity

the PAC SNI-1 has been in service for about 6 months and still is keeping the hum at bay. The church Sound has has no perceptible hum and the Video is the sharpest and clearest it has ever been on the DVD's we produce.

This little inexpensive device has done what larger and/or much more expensive devises could not do.

I still love this product!

I bought it for my Tahoe and ended up using it everywhere in my sound and home theater, great product and value.

This little device FIXED a long standing problem in our church's soundroom.

Several devices were tried between the computer and Sound Mixer, but always with some audio hash and hum noise. The SNI-1 connected between the computer and Mixer resulted in the computer noise going down to the residual noise floor in the mixer.

I LOVE this thing! And another side effect is that the video feed is quieter also.

NOTE: I assume the durability of this will be good, but I've only had this for two days.

I just bought this and it works great, great, great. For such an annoying problem this is a very cheap fix. Got rid of the whine and my system sounds great. It may have even added a little sound quality because once I used it my system sounded better. Could just be because that horrible noise is gone or because it does in fact add SQ. Glad I didn't go with the more expensive ones because this gets the job done.

I've had it for several months now. This item is great for slightly older (pre-2007) G35 owners that want to be able to hook up Auxiliary input. However, it is only if you know how to take apart the stereo and get access to the cables and such behind it.

Once you are done, it's great! Never really had problem with it.

I've always used these noise filters if I'm getting distorted noises and they have always worked. Once the noise is coming from the RCA wires, this product will eliminate it. If its a power noise, it won't. They have a different one for the power noise and pop noise.