>>So really are you asking us if we could revisit the EP350 and see if we could boost its performance by adding about $50 to the selling price? That sounds like it might be a good idea.
Exactly. "My" EP400 was always the EP350 in the EP500 enclosure for a lower tune point but otherwise largely unchanged. Positioning-wise, IMO the main midrange HT "sweet spot" is deep bass at moderate volumes at a good price.
I'm actually kinda glad you used EP400 for the "high end small enclosure" product (which looks great by the way !!), now we can use "EP350 V3" for the "EP350 in a bigger box" product