 Centered on the roof of the stage was a pair of Altec 612 cabinets topped with a pair of 203B horns.Four Altec 612 cabinets were in pairs at the left and right edges of the stage, surmounted on each side with a 1003B multicellular horn, an Altec A7 "Voice of the Theatre" cabinet, another 203B horn, and an Altec 9844 studio monitor for front fill.A pair of Altec 214 loudspeakers served the musicians as sidefill left and right, which in 1967 was an advancement in stage monitoring.