Retrospect

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Across
  1. 4. Large, portable stereo system popular in the 1980s
  2. 5. Records are made of this
  3. 8. Makes the music louder
  4. 9. Plays songs, news
  5. 10. Audio output device
  6. 14. Theme of this year's TEDx event!
  7. 16. Antique record player with a large horn
  8. 17. Short for "radical"
Down
  1. 1. '80s slang for awesome
  2. 2. Curated music compilation
  3. 3. Coin-operated music machine (diner music selector)
  4. 6. A device for spinning vinyl discs
  5. 7. Device used to listen to the mixtapes you made in the 80s
  6. 11. '70s slang for "cool"
  7. 12. The needle on a record player
  8. 13. Magnetic recording strip (cassette contents)
  9. 15. Portable cassette player