Hi everybody, 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 u wants this design so please mail me:- This email address is being protected from spambots. You need JavaScript enabled to view it.. For free. If you have any problems, inquiry or any suggestions, don’t hesitate & feel free to ask. We are always there for you. Thanks, Prashant.