What I did too get a blu ray player & Sat box too work. From the RCA audio out (stereo left/right or red/white) on the Sat box & BD player, run a female RCA "Y" (2to1), one "Y" for Red, one "Y" for White (2 "Y" total), 4 wires (male to male) down too 2 (left/right) wires (male to female) then hooked up the headphone base using a 3.5 mini jack to male RCA (white/red) adaptor that came with the headphones.
Then all you do is turn down the volume on the tv & turn on the headphones, the tv audio runs off the HDMI cables.
If you just have one thing too hook up you do not need any "Y" adaptor.
If you need photos of what it looks like let me know, I can get them up Tuesday or Wed.
I got all the stuff I needed from www.monoprice.com, cost about $16 including shipping.
My 42" Panasonic LCD had a headphone jack that I could hook my wireless headphones into. 46 plasma does not...any suggestions on how to hook up the wireless