ST. LOUIS by OAP Audio | Oct 20, 2016 | Houses of Worship ARCHITECTURAL & ACOUSTIC CONSIDERATIONS The OAP C-1 was sutom stained to match the church’s wood interior. An OAP NF-80 was also custom stained and mounted to the rear of the beam to provide monitoring for the chior. AUDIO EQUIPMENT SELECTED C-1 | NF-80 C-1 NF-80