Had faulty PA kill the DI on my amp, this should prevent this happening in the future (to be fair I have only had this happen once in my 30 years of playing, but it cost me an arm and leg to fix the problem). So i would say the TritonAudio Phantom Blocker is more about peace of mind for me. It seems well made and solid, easy to use (put on PA XLR cable end, wait 5 secs, plug into unit/amp, your good to go)