I need some extra power for connecting my AKG K701 headphones to the Astro Mixamp. It powers up fine, however when connecting a microphone to the mixamp as well as the K701's it produces a loud humming noise which I believe is from the lack of power.
I don't have an amp right now, but what I do have is a Fatality Recon3d sound-card in my PC. This may be a stupid question but can I connect my headphones to the sound-card and then to the xbox and mixamp?
I have attached a mini diagram of the inputs on the sound-card, any help would be greatly appreciated .