This is developed model of fallowing disign (https://www.thingiverse.com/thing:6123975)
There are some differences between first model and second one
First, i tried to assemble speaker units, crossover filter, and amp board all together
so this speaker works like active speaker.
Second, replace air duct from back to front.
By this way, i can solve the booming
| speaker_1.stl | 1.6MB | |
| speaker_2.stl | 940.7KB | |
| speaker_3.stl | 1.3MB |
