Can you use motion sensors for speakers?

Yes you can. here is how. you take of the back of the speaker if possible. look at the circut board. there should be two red wires in the middle and a black wire in the right hand upper corner. you now need to detach these wire. the circut board of the motion sensor looks the same attach the wires of booth systems to their match. put the back on both devices, and set the motion detecter on top of the speaker. walk past the detecter or wave your hand in it and it will signal the speakers to turn on. the speakers will then signal the radio to turn on and to turn it off do it maually.