We switched to this unit after having tried the Radial Engineering Pro Iso. Although the Radial was recommended for quality, its sound level was too attenuated (passive). The ART CleanBox is active and allows you to adjust the volume. We use it for de-balancing a distant mixer-aux-out signal before it is fed into a live stream. Great sound quality with no noticeable degredation, and well build. The fact that it even allows two-way conversion is great, although we only needed one way. Recommended highly!