sE Electronics has given its reflexion filter series a facelift in their packaging. The new look is great! Of course, sE is still manufacturing the best reflexion filter in the market. In fact, they are the one who invented it. That’s why until today, I only carry the reflexion filter from sE. There are many other brands in the market. Some are just simple foam which makes your audio sound worse, some are pretty close. If someone ever tells you that the reflexion filter make their audio sounds better, they are doing it wrong. The acoustic treatment booth is not supposed to change the color of your audio.
You can find out more information about RF-X here.