Quote:
Originally Posted by White64Goat
Does adding the adapter cause the speaker to contact the backside of the door card now?
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The speakers do not come in contact with a 3/4" adapter.
Quote:
Originally Posted by White64Goat
Factory speakers make the speaker opening/knee pad to vibrate, does this also cause the vibration?
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The vibration is due to the sound waves hitting the inside of the door panel/door card and/or the knee panel. The lower and louder the bass the more vibrations that they will generate (speaking in generalities, of course).
Any speaker will do this, and it is not a property of a particular speaker or setup. Adding deadener to the surfaces can reduce the vibrations.