I am very new to the world of portable headphone amps but I'm pretty sure I need one. Nothing fancy, small and inexpensive is preferred. Here is what I am trying to do: I have a tv and DVD player set up in front of an exercise bike. I run video out to the TV but run an audio out cable from the DVD player to the bike so I can use my earbuds for sound. I use an old pair of Etymotic 6i IEMs that are 16 ohm and shouldn't require much power. The cable coming out from the DVD is male RCA plugs to female mini plug, about 12' long. I have a Koss Remote Volume Control, VC-20, plugged in to the extension, and the headphones plug in to there. Even with the volume control up all the way, the audio needs a boost so I feel a small amp would help in place of the Koss device. Small size is important because there is no good place to put a large device. Also wondering if an amp is all I need. Does getting a small amp/DAC combo help with the sound at all in this situation? Any advice on what I need generally or specifically is appreciated! FYI, I am able to use these IEMs directly with my iPod or phone with plenty of volume. I only need the boost when coming out of the DVD player.