Hello,
I made a new study for
4 FR here 2 x SPH30 4 Ohm direct
and 2 x invers SP-60 Monacor

in two bass horns with
horn mouth distance and
membran movement cross seting.

opinions?

http://www.hm-moreart.de/96.htm

I don't know anything about designing speakers, so I can't comment on your design other than to say it looks cool.

Hello,

a few variations are possible,

specially:
if the cross in the press chamber is removeable, you can test
all horns are acoustical parallel, or two long and two short horns,
or 1 short 1 long horn twice,
also possible to make a change in connecting the drivers.

Invers reduce the K2 distrotion, and you need no crossover,
the sound room information is below 1 kHz, thats the point.