The Y-18 is a high power, 3-way line array featuring two patented Adamson mid/high drive modules. The Adamson drive module has a co-axial entrance and a co-linear exit comprised of a high frequency sound chamber mounted within a mid frequency sound chamber. The drive module is powered by a proprietary 9" Kevlar mid and a JBL 2451 compression driver. Together, the drive module and trapezoidal cabinet design create a smooth, slightly curved, seamless wave front with no gaps between cabinets. The Y-Axis has a defined coverage pattern of 100 degrees by 5 degrees at -3db down. The vertical coverage is determined by the number of cabinets added to the array. The Y-Axis comes complete with a sliding hinge rigging system with six one-degree increments you can achieve precise angular positioning by adjusting the extension of the sliding hinge while the front of the array remains closed.