For some reason my William's Multicade marquee make a interfere when I dim it. I rewire and the noise persist. I found this item by mistake and decided to try it. The best decision ever. No noise on my speakers, just crystal clear arcade music.
Does what it's supposed to, but effect is negledgibal. Anything that helps keep things at an acceptable noise level is useful though.
I have two arcade games I had some noise out of speakers. Put this product on both and now clear sound Great product. A must have