A:AnswerAs long as your reciever has an output, it will work. The sub has a built in crossover, so even it it is not a sub output, you are okay if you are going for music. If you are going for movies, go ahead a get a new reciever with a dedicated subwoofer output so that the decoder will play on the correct channel.
A:AnswerYes, the subwoofer will work with just about any receiver, that allows speaker wires to be attached. It offers not only a wireless connection, but also offers a wired connection.
A:Answeryour receiver device must have multiple sub outputs to support each sub other wise a filter could be used to remove unwanted frequencies. high or low pass.