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By definition and functionality, they are not for mobile entertainment systems; quite to the contrary, they are for fixed entertainment systems, such as TVs, stereo receivers, radios, etc. The wireless headphones are the mobile part of the equation; you can move around your house while wearing them and watching the TV or listening to your stereo system. Just hook up the transmitter piece the headphones came with to the audio output of your TV (as an example) and enjoy !
First thing to do is check to make sure that the batteries are properly charged.
Second, make sure that you have a clear line-of-site to the IR transmitter. Infrared (IR) works the same way that your TVs remote control works - if the signal is blocked, then you will not hear any sound.
Third, make sure that you are in the rear seat of the vehicle when listening to the sound. The IR transmitter only transmits to the rear seat, so you will not hear any sound if you are sitting in the front seats. This is a common problem that i see.
Lastly, make sure that the heapdhones you purchased are compatible with your 2006 2007 2008 2009 or 2010 Toyota Sienna. Remember that some older models require RF headphones, not IR headphones. I checked http://www.audiovideo2go.com for compatibility before I purchased my headphones. They have a useful listing of all the headphones and models of vehicles they are compatible with.
Try turning your stero to 88.7. I cannot figure out how to get the sound to come out through the jacks though. I plan on buying the IR headphones at somepoint, but I would like to be able to use the jacks in the meantime
Youll have to run sets of cables from your head unit to the seats, youll prob only need video, power, and ground if the sound will come from your speakers. For the same display on either monitor run to first position then link the 2 monitors.
If you're handy, you could rig up a wireless solution to this. The problem is that you have two screens, each presumably playing a different movie. If you purchased an off-the-shelf wireless transmitter accessory, you could connect it to one of the screens. But then if you purchased a second wireless transmitter accessory, and connected it to another screen, you would need to make sure both wireless transmitters were operating on different frequencies, so that each person could wear a different pair of headphones and listen to their own movie. Hopefully this makes sense.
You could use either an FM Modulator to do this, or an Infrared Audio (IR) transmitter... Remember, these units aren't like factory installed headrest systems; they don't have the wireless audio transmitter already built-in, so you can't just buy wireless headphones and listen to them.
Firstly, make sure your DVD have built-in IR wireless module so that your headphone can receive the audio signal from your DVD player.
Second, it should be clear which frequency transmitted from your DVD player. Generally speaking, there are two frequency of IR transmitter.One is 2.3MHz/2.8MHz. another is 3.2MHz/3.87MHz. Only emission frequency same as receiver can receive the audio signal.