Hey this is prashant from India. I am a sound engg student in Mumbai.
I have made some speaker design; also I have made a NEW Dual 18” folded horn speaker cabinet.
After completed R&D we have give it to 54 Hirer for testing purpose. When they connected In open Air, Sound (punch) comes near very hard & long soft tone. They played 12hr continually there was no problem found.
I have used in inside enclosure 2 x RCF LF18N451-1500watts RMS. & also used 2 x PD1850.
If you have any problems, inquiry or any suggestions, don’t hesitate & feel free to ask. We are always there for you.