simulations: alignments

summary of alignments considered

 

 

1. Sealed 55L with moderate eq

Q 0.55

F3 40 Hz

2. Vented 70L

2. Vented 140L EBS

feedback, comments, suggestions?

Feedback is welcome. All this is "work in progress" and I'm constantly updating my information

Adire audio on vented alignments:

Vented alignments offer many advantages when compared to sealed enclosures, including lower cone motion around tuning, reduced distortion around tuning, increased power handling around tuning, extended bandwidth, and other effects. However, there is one significant drawback to vented systems; namely, driver unloading below tuning. At frequencies lower than roughly 1/3 rd octave below the tuning frequency (Fb), the box completely “unloads” the driver. The vent is operating 180° out of phase with the driver. The net effect is that bass response rapidly drops, and so does power handling. Driver excursion greatly increases below Fb. For this reason, many suggest using a high pass or “rumble” filter with a vented design.