Pyramid 200W 15A RCA Noise Suppressor - Designed for Audio Signals & to Eliminate Noise, Isolation Transformer, Used w/ Amplifier or EQ, Install w/ RCA Jacks & Unique Noise Detection Circuit NS20

Nobody could figure out my car audio feedback problem. It wasn't a whirring sound and it didn't react to the gas peddle. Instead it was a rapidly clicking sound at idle. I tried different amplifiers. I tried different RCA cables. I even tried putting Noise Filter Cable Ring magnets onto my RCA cables. None of that worked. This product is the only thing that worked! The feedback sound is gone! The audio quality of my music has not been negatively impacted at all either. I'm a very happy customer!

Had some sort of backfeeding noise coming out of my Polaris RZRs audio system, decided to purchase this item. Was very skeptical about this product and didn't think it would make a difference but man was I wrong. Took out all the noise without sacrificing audio quality. Would highly recommend this product to anyone with audio signal issues/noises.

This product might work for someone else but not my setup. I bought two filters one for the amp powering my mids and also one for my sub. Filtered none of rhe whine. Another downside is it did take away alot of the base from mids and sub. Threw it in the garbage

Pro: got rid of the noise. Con: got rid of most of the bass. I am using this thing on a DJ controller. The USB line isn’t well isolated. I got a powered USB isolator and it worked great for a couple weeks, then died. So I thought a transformer like this might be better… and, well, it absolutely got rid of the noise. But not having bass, for DJ Purposes, is a bit of a deal breaker.If you can deal with the loss of bass then this product might be perfect for you. Other folks may want to explore other options, unfortunately.

Easy to install with great rewards.

I purchased this to eliminate interference coming through my gmc speakers while using external viewing source using rca input in vehicle, i am disappointed it has made no difference whatsoever so I guess I’ll go do some more research before buying different one.

I bought this to remove ground loop noise when attaching portable devices to home stereo equipment. This is actually the second unit I tried; I first bought one with 1/8" plugs/jacks and it definitely added noise. I had something like this that I got many, many years ago (don't recall where; Radio Shack?) that seems to be much higher quality that this unit. Anyway, this was to replace that old unit that I ended up putting in a system. This unit, however, seems to be completely unshielded (and components rattle when the unit is gently shaken). Seems to pickup any magnetic field that may be nearby. MAYBE okay in a car where there are no/few 60 Hz AC fields present (we hope). So, if you are only using it in a car application, it is probably okay, but I haven't tried it.

Works exactly as intended. Thank you.