This double splitter works perfectly. I have a live video company and I shoot a lot of weddings. The most important part of a video is the sound. You can make anything look good as long as you get nice clean sound. I always say that half of the video is audio. For years I ran a line straight from a DJ's mixer to get sound. The problem is that during the introduction you hear the music the DJ is playing and the words he is saying. But often the signal is too hot, the music sucks or the DJ says something stupid. Only with a DJ's voice can I edit at will and compress the time. This product has improved my production beyond its retail price. I use them to run a separate clean audio line from my DJ's wireless systems to my own audio recorder. They work great and have never let me down.