JBL GTO937 6x9" being used as both front of house and for foldback. ESP preamp and Linkwitz Riley crossover "project 09b" + "P88" crossing over between the 2 amps. 41hz Amp9-Basic running the mid-higs and the foldback. Hypex UcD180 powering the 2 JBL SB-2 subs.