The Robb Collections: Modernization of a vintage corner-horn speaker
Public address system - Wikipedia
Amazon.com: Pyle-Pro 4x4 Inch Speaker-Heavy Duty 150 Watt High Power Horn Audio Tweeter System w/ 25mm Voice Coil, 15 Oz Magnet Structure, 1kHz-18 kHz Frequency, 105 dB, 8 Ohm Impedance-Pyle (PH44) :
8186 IP Horn Speaker - Algo Communication Products Ltd.
Amazon.com: Pyle 2in Tweeter Compression Horn Driver - 500 Watt High Power Car Audio Speaker Tweeter System w/ High Temp Voice Coil, 400-9000Hz Frequency, 102 dB, 8Ohm, Heavy Duty 30 oz Magnet
Classic Audio Loudspeakers | Field Coil Horn Speakers