Transmiting audio for HT

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Hello all , I need to transmit 2 channel audio signals to speakers in a home theature setup about 15 feet apart.Only power lines are available in the speaker positions (2 rear speakers),the audio signals are to be via a small receiver.Can't put cables from amplifier to rear speakers.The amplifiers are to be inside the speaker boxes.the input audio signals to be received via FM receiver
Available options are using 2 FM transmitters at the DVD player end and 2 receivers at speakers end,but because of poor stability,(W/o any PLL) the signals will tune out,
Any ideas ?
 
What about infra-red?

This would be quite easy to make using an opamp to modulate the light output directly or you could FM modulate it. The receiver could be a photo-transistor etc... There are many circuits available on the web for this setup.

Build two directional units and set them up for line of sight.

Would look cool and be a discussion point too.

Cheers
 
Transmitter circuit: Did not try...
 

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