My Behringer Ultra~Compact 4 Channel Stereo Headphone Amplifier Model HA 400~ $20~ Ordered From Walmart Catalog
Because I am hard of hearing I needed a little help, and got a lot of it from this amp.
Total Control Of Stereo Volume Sony headphones at Walmart~$20 Had to buy two phono adapter jacks to plug the microphone jacks into from Radioshack $20 , and an extention Mic cord $?? because my Mac tower is 6 feet from my monitor.