ut not totally occluding the vents will effect the sound for the bass and treble?
once you covers vent at the back, ie800's bass quantity will reduce by 10db
Thank you, that's good to know.
what is the effect on the treble from the d2ca when the vents are covered?
two port at the back is helping dynamic driver to move easily. when dynamic driver runs, it moves air in both front and back of the driver. If enclosure is sealed, dynamic driver will having hard time to move because vacuumed air will against the movement of the driver. Simply, physical impedance will be increasing at the back of dynamic driver when enclosure is sealed.
Then What will happen is driver is suffering to move back and forth causing lose of extension on bass.
Also driver makes peak at the high frequency due to under damping of driver or you can say Acoustic resonance.
Acoustic Resonance can be reduced, or moved to higher FR range that is not really sensitive to human hearing.
This is a reason why you always see air vent on dynamic driver iem.
