Which impedance is better for headphones?

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Tags

1. #deliver
2. #require
3. #power
4. #impedance
5. #equipment
6. #approximately
7. #music
8. #audio
9. #headphones
10. #example
11. #amplification
12. #little
13. #devices
14. #other
15. #players
16. #levels
17. #phones
18. #portable