My Mechanic's Car Audio

1st January 2004 - report written and upload

True event circle around middle 2002

Woofer in Car

Please notice the green color curve. It is measured placing the mic at the passenger seat and playing the woofer from the trunk - all door closed. No one is in the car.

Notice how the cabin interaction with the woofer box......

There is a phenomenon of all frequency migrating downwards. As noticed in the Jwo Shong's Car Audio.

Therefore it is safe to assumed that the woofer does not need to drive so low, because we get free sound from the cabin space. More to be elaborated in the future.


  1. My Mechanic's Car Audio
  2. Before Filtering
  3. After Filtering
  4. All Loudspeaker Sum
  5. Active Filter's Combined Phase Response
  6. Kicker Sonic Woofer 12" Square
  7. DLS 6.5" Midrange model MS6 from Component Set
  8. DLS Tweeter from Component Set with Mid model MS6
  9. DLS Tweeter High Pass Example
  10. Right Real
  11. Right Real smoothed at 1-3 octave
  12. Right Real smoothed at 1-6 octave
  13. 1-6 octave versus 1-3 octave
  14. Mid Flip Phase - Right
  15. Mid Flip Phase - Left
  16. Woofer in Car
  17. Bad Passive 1
  18. Bad Passive 2
  19. Right Mid only example
  20. The end - Aftermath


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