Star Sound Technologies. I tried their Audiopoints first and what a differnce. The soundstage increased in height and depth. I have since then moved up the food chain and purchased their Sistrum Sp-1 to go under my speakers. I have not received them yet but I will comment when I do. They offer a 30-day money back. This has been my experience and I am sure you will get other ideas. Whatever you choose I would encourage you to hear it in your system to determine if it is a right fit.
