Most home speaker and stereo systems have some type of RCA audio wire connection. This allows you to hook up outside devices, such as DVD players or televisions, to the system. However, if you are looking to connect an XLR-based microphone to the speaker system, you need to convert the XLR cable to an RCA-based wiring. This is done using a standard XLR-to-RCA adaptor cable.
Plug the XLR cable into the XLR port on the bottom of the microphone.
Insert the XLR end of the XLR-to-RCA adaptor cable into the XLR cable you have just connected to the microphone.
Connect the RCA wire end of the adaptor cable into the "Audio In" port on the stereo or speaker receiver system.
Power on the speaker system and the microphone, then select the RCA wire connection you are using on the system (typically it is the "AUX" port, although some systems do have its connections numbered). Once the appropriate connection is selected, the audio from the microphone will be received and played through the system's speakers.