# External Speaker Connections

- An audio output suitable for driving an external speaker of 4 to 16 ohms impedance, headphones, or other audio system, is available via the jack J1, marked SPEAKER OUT, located in the upper right hand area of the main circuit board.
- This jack is designed to accommodate an RCA-type phono plug. The tip end will be the audio signal, and the shell will be the ground.
- The output signal has a nominal impedance of 8 ohms and a nominal average amplitude of 1 volt RMS, when the speaker volume trimpot marked SPKR is set to full clockwise position.