Amazon.com: D Debra Audio AU400 Pro UHF 4 Channel Wireless Microphone System with Cordless Handheld Lavalier Headset Mics, Metal Receiver, Ideal for Karaoke Church Party (with 2 Handheld & 2 Bodypack (A)) :
Sinbosen Fp30000q Pro Audio Class Td Power Amplifier 4 Channel 10000w Amplifier Board For Subwoofer 18 Inch - Stage Audio - AliExpress
8'' PRO AUDIO MID RANGE SPEAKER 400WMAX – GENIUS AUDIO USA
SM Pro Audio TC01 Single Microphone Preamp with Optic Compressor – PSSL ProSound and Stage Lighting