Just found out these even existed: someone made cassette-format devices that receive Bluetooth audio and convert it to whatever the electromagnetic form is that a cassette player’s reading head expects, so you can put your mobile device’s music through old stereos… that… maybe… have very good speakers and don’t need replacing, I guess?
I’m actually looking to get a vintage CD and cassette player for someone who wants to listen to their old ‘physicals’ (and potentially buy more CDs down the line) but would likely also enjoy being able to pipe in some Bluetooth signal from time to time. This would be a perfect add-on for one of the more competent early 90s boomboxes.
I don’t suppose anyone here knows any such cassette with a respectable DAC of known quality inside? 
