Thank you all for your help. John- that was not what I wanted to hear, I was hoping to do without the amp. Now that I have to have one I looked over some of the suggestions from the members who gave advice.; Thank you all. The simplest solution I came up with is to buy a Grado RA-1 headphone amp and modify it myself. First bypass the cheap volume control and couple it to my TVC 102 KIT. If anyone has moded one of these units let me know what you found and what worked. I plan on sticking with the battery operated unit and should be able to use some of the remaining space inside my TVC 102 CASE. I suspect it is just a simple opamp inside but I have not received it yet. A wire diagram for it would also be helpful if anyone has one. This turned out to be the simplest solution for my specific need but I did look at all of your ideas. Thanks& happy trails