* High Grade Injection PP * Accurate Exponential Flare With Great Directivity Construction. * Optimized Curves For Low Distortion * Reinforced Neck Joint For 8-in Speaker * Throat: 8-in * Material:PP * Eight inset rear bolt configuration plus eight top bolt holes * Driver Connection: Bolt-on holes to center: 200 mm * Driver outer flange across:215 mm * Opening 135 mm * Top Edge: 11.42-in (290MMmm) Square * Height: 6.3-in (160mm) horn