The 70° × 40° waveguide is a rotatable high-frequency waveguide that produces a nominal dispersion pattern of 70° horizontal by 40° vertical (-6 dB). It is part of Adamson’s proprietary prolate spheroidal waveguide system, designed to ensure controlled directivity and consistent tonal balance across the coverage area. The waveguide maintains even frequency response and minimizes diffraction or lobing, especially when listening outside the direct on-axis field.