My dad's old Bose 901s hooked up to 901 equalizer and Yamaha A-700 amp. Sound from nest hub to Bluetooth receiver or boombox (CD/Cassette/radio) : r/audiophile
Bose SoundLink Flex Portable Waterproof Bluetooth Speaker | eBay
Amazon.com: Bose Wave Radio IV - Platinum Silver : Electronics
Bose SoundLink Flex Wireless Waterproof Portable Bluetooth Speaker, Stone Blue - Walmart.com