Please forgive my poor english I am German.
I want to use only the basshorn part of my Yamaha S5115HT speakers.
They are like the Altec VOT with a bass horn that is also vented using a 15inch speaker.
I will not use the vented part but add a back chamber to the horn.
The horn mouth is 26,5 inch x 22,5 inch. Depth is 14 inch. The throat is about 12inch in diameter with slightly flat top and bottom.
How low will this horn go?
Is 160 hz possible?

Thanks,
Klaus