For 70V commercial installations they seem to be a good base standard, or maybe a little overkill. They come with transformers, standard wiring options, relatively good sound. Keep in mind this is not a live PA performance, it is background music for large (or many) venues and an announcement. They work well and I haven't had any problems with any of them so far. The customers are happy with it and the price is right.
KLIM CD Boombox Portable Audio Player with FM Radio, Rechargeable Battery, Bluetooth, MP3, AUX, Neodymium Speakers, and Upgraded CD Laser Lens (2021 Edition)
11 Review
AUNA Connect 150 Black 2.1 Wi-Fi Internet Radio Music Player With MP3 USB Port, AUX & Remote Control - Black
16 Review
Sony ICFC1TBLACK Alarm Clock Radio
11 Review
Sangean PR-D4W Portable Weather Alert Radio with AM/FM Bandwidth Narrowing and Auto Tracking for Improved Searchability
12 Review