Thanks again GM.

I asked about sq root as I was trying to understand height and width of horn mouth....so I now understand the horn throat is more than just the driver cutout.

My horn's throat, therefore will be smaller, 18cm by 20cm...close to altec standard for driver cut out.

Flare is ' line of best fit' based on 31 inches.

Axial length is 40cm.

Sm is 68cm x 68 cm (26.7 inches 2).

Volume of cabinet 260 liters.

We'll just see how it sounds. Under $80 of materials to experiment with an idea...the cost of having my cake while eating it too...!

I can run some eq and correction for any dips/peaks anyway.

With this type of (115hz) horn, what would your preferred high xover point be, given 511/902 in use?

Kindly