Dont need it...get more strength out of the motor without a pole vent, and there are are other much more efficient ways of cooling the coil.Why dont they have pole vents? Every sub ive owned had pole vents. My SX, my M-Class subs, and i forgot the other one.
Yes, less saturation in the gap...Really? So pole vents reduce motor strength? So im guessing the vents under the spider do a **** good job of it! lol. thanks.