Hey gents - I appreciate the comments, it feels good having positive feedback reinforce my sentiment I think I’m heading in the right direction.
@Rob181 – This is a fair question I’ve felt I‘ve owed to the forum so I’ll list the gear soon on my page just so that I don’t completely derail the...
This configuration reminds me of early Egglestonworks Andra model dual 6" midrange cabinet construction.
I would assume the surface area depends on how flow restrictive the material is with the more flow restrictive material requiring smaller venting area. There would also be associated costs...
May also be some form of aperiodic damping enclosure to lower speaker "Q" for given box size. Visually there does seem to be some open cell foam or some sort of air flow restrictive material on the backside.
Geez, with what is usually a good source of entertainment, I can usually follow the story line. Now even I'm getting confused between facetiousness or the normal forum cordial love/hate relationship.
To add, most cellphone MEMS microphones frequency response start to drop off around 50Hz so I tend to find the lowest bottom end of cellphone videos tend to be lacking.