The Juke box is a house improvement that can be acquired from either Moira Brown or Lydia Montenegro.
The value of the Jukebox can range from as low as 500 caps to as high as 800, depending on your Barter Skill.
The Jukebox will always play Galaxy News Radio when switched on.
You won't be able to hear the Jukebox in your Tenpenny Tower Suite until you boost the GNR signal. It will also be quite low in your Megaton Shack until the signal is boosted.
There is a jukebox in Vault 101, but it is broken and doesn't play any music.