Amazon.com: AudioPipe APHC-6278 7.5 Inch 400 Watt 8 Ohm Pro Compression Driver Tweeter Car Audio Speaker Amplifier Kit with Aluminum Horn, Black : Electronics
PRV Audio Announces New WG270Ph High SPL Compression Driver with 4x4" Horn | audioXpress
Amazon.com: PRV AUDIO WG270Ph Horn Driver - 1" Exit Phenolic Compression Driver 150 Watts Max Power 8 Ohm 106.5 dB 75 Watts RMS with Compact 60° x 60° Exponential Horn for Car Audio : Electronics