The first step is to remove the original speaker. It will be replaced by the recording module which has its own speaker. Begin by removing any covers on the receiver so that the circuit board and the speaker are visible. Disconnect the speaker from the board by cutting the wires at the speaker terminals. Remove any screws or fasteners that may be holding the speaker in place. Then remove the speaker from the housing. The speaker may be held in place by glue. If it does not peel away easily, you may need to use a sharp knife to carefully cut the speaker free.