| DS18 PRO-HP52 Bolt On 2 Throat 57° 2.6 Depth Plastic Horn DS18 PRO-HP52Bolt On 2 Throat 57° 2.6 Depth Plastic Horn DS18’sPRO-HP52is our latest addition to our series of short throated horns! This waveguide has a mounting depth of 2.61� and a throat diameter of 2� for extreme directional sound that can... more | | $19.95 FREE shipping go to store |