I'm going to have to return this.The switch on my phantom-powered microphone began to bleed through a little when it was turned off.The on/off switch abruptly ceased working after a few hours of use.That seems strange for a setup like this, which is often used with powered microphones.When I look at the manufacturer's website, I can't see this product there.It is probably discontinued because it is ineffective.Numerous reviews on this page describe the same issue without indicating that it is a power problem.I can't confirm that's the cause, to be honest, but that's what I think.