On August 15, 2019 at 21:30, King of typos said...
It’s actually in the literature of this sub...
“ Low-Heat Design*
Our inverted band-pass design puts the woofer’s voice coil and magnet on the ported side of the cabinet. This provides a constant flow of fresh air, which keeps things cool for trouble-free performance. *Applies to 12" only.”
[Link: snapav.com]KOT
Well there you go. that makes no sense!! Open the motor structure to moisture and humidity to keep it cool!! Weird