No clue on the enclosure design, but apparently this
kit is discontinued.

Note further down the new model designed fro pro audio at clubs.

The copy says couple behind the new model listened comfortably
but that if a PA were used to get the same volume to the whole
club audience, these folks would have been driven to the back
of the room.

Is this true?

I have a fresh baffle board cut and drilled for my own
straight 8's using the 50 cent Pioneer speaks. My version
is not ready for prime time yet. No relation to the Bottleheads.

• Straight 8

Yes, the design is going to be replaced by a so-called
pro-audio rig appropriate for live performance in small
clubs.

Keep an eye out in the Fitzmaurice forum here at ART
for a new TLAH (transmission line array horn.)