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Alphasonik 8" Portable Rechargeable Battery Powered 800W PRO DJ Speaker | Alphasonik
American Audio APX12 GO BT Battery Powered 200W Active Loudspeaker - Phantom Dynamics | Nightclub Lighting | Lasers & Sound
Electro-Voice Everse 8 8-inch 2-way Battery-Powered PA Speaker - Black | Sweetwater
Convert A Speaker To A Battery-powered Amplifying Party Box | Hackaday