Williams AV IR A4 IR+ Emitter ArrayThe IR+ features a distributed IR emitter array architecture allowing up to four emitters either stacked together for large room arrays or distributed throughout the room to accommodate wings in room design, balconies or other obscured venue locations. Up to 16 IR E4 emitters can be connected to an IR M1 modulator with the use of the IR A4 arrays. Each IR A4 array can have up to 4 IR E4s connected. Specifications Dimensions: 7. 6W x 6. 6D x 1. 1H