A few solid state games were fitted with headphone jacks. If you don't own
one of these you may want to modify your solid state game to try it out.
Go to a place like Radio Shack, or better, and buy a single
closed-circuit headphone jack. This type will shut off the pinball's
speaker when the headphones are plugged in. You may also want to get
headphones that have their own volume control, or buy an in-line unit to
The preferred installation location for the jack is on the front end of the
bottom of the machine. Most people don't like the idea of altering visible
portions of the cabinet.
When connecting the wires, but sure to pay attention to the positive and
negative connections of the speaker wiring. For machines with digital
stereo you will have to do a lot more wiring. Most solid state machines are
monaural and you can just use a jumper on the jack to get output to both
If you are not comfortable with patching into stereo outputs, you may not
want to try this modification. Rumor has it that if wired incorrectly your
sound board may be damaged. Also, it is recommended to use only stereo
headphones (not monaural) or you may damage the sound board.