Amazon.com: Pyle Portable Bluetooth PA Speaker System & VHF Wireless Microphone System - Professional Battery Operated Handheld Dynamic Unidirectional Cordless Microphone Transmitter Set W/Adapter Receiver : Musical Instruments
Omnidirectional speakers
MBL 101 X-treme Omnidirectional Speaker - The Absolute Sound
Stylish and Powerful Coaxial 4 Inch Hang and Wall Speaker Unidirectional Loudspeaker with Over 90 Degree Angle - China Wall Mount Speaker and Home Cinema Speaker price | Made-in-China.com
These directional speakers throw sound in focused beams like a spotlight - Yanko Design
LG XBOOM 360 Portable Wireless Bluetooth Omnidirectional Speaker (Burgundy) - Walmart.com