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. Light aluminum dollies, and all the components for rigging the Y-Axis come standard. Aluminum rigging frames to support 16 or 24 Y-Axis are available as optional accessories.