yup, same drivers as the original ones C-12 500MB, ang nabago lang is the Hi, original design is two 1.5" throat if Im not mistaken, pero pinapalitan namin ng single driver lang but yung 150w PADE99 and my friend (Pulan) is the JBL counter part. Durability wise ng PAudio well, my 378s are both still intact after 4 years, yung mid di nag babago performance. Meron din ako nakasetup sa bar na dual 12 but front loaded both are also C12 500MB, mahigit ng two years 7 nights a week of continuous usage in a live setup, di pa din nasisira hanggang ngayon. The cabinet was made by another company originally 15" drivers were intalled but it didnt last long so I replace them with straight P audio C12500mb as we all know 12"s drivers are best for mid.