Rockville RPA60BT V2 1000 Watt 2-Ch USB Bluetooth DJ/Pro/Karaoke Amplifier Mixer, Black

Bridgold 10pcs MCP6002 6002 MCP Low Power Op Amp 1 MHz Bandwidth,DIP-8.

SHIDU Voice Amplifier with Wireless UHF Microphone, Professional Portable Bluetooth Speaker with Headset and Handheld Mic, Personal Power Amplifier for Teacher, Meeting, Speech, Outdoor Events

20W Bluetooth Voice Amplifier Wireless Microphone for Teachers, Portable Waterproof Voice Amplifier for Teaching, Speaking, Classroom, Personal Mic Headset and Speaker System M801

Behringer NX3000 Power Amplifier

Voice Amplifier Wireless with Lapel Microphone Charging&Storage,Portable Voice Amplifier for Teacher with Microphone Headset and Speaker,Mini Voice Amplifier for Classroom,Speech,Training-Beige

Crown CDi 1000 Two-Channel, 500-Watt @ 4Ω, 70V/140V Power Amplifier

Voice Amplifier for Teachers with Wired Microphone Headset and Waistband, Portable Rechargeable Speaker Megaphone for Classrooms, Speeches, Tour Guide, Meeting, Coaches, Outdoors Indoors

Crunch Ground Pounder GP-2500.1 2500 Watt Monoblock Amplifier

Behringer NX4-6000 Power Amplifier

7