@Butch! There's also this:I was at the school today and met the Athletic Director and finally got the whole story on the Bluetooth request. The girl's basketball coach wanted to play music from his phone during warm up before the games so he strung together a bunch of adapters from Amazon until he got something that fit in the mic jack on the rack. It sound like crud so he then cut up one of his cables and tied directly into the rack mount mixer (terminal block inputs). It still sounded like crud (line level going into a mic level mixer) so they decided they must need new speakers. When I was up there over a month ago I properly hooked up to the mixer and played some music so they could hear that the speakers were not dead. So then they wanted a proper Bluetooth connection which is why I started this thread. After explaining all the issues which were raised here they have now said they don't want Bluetooth and to get them a direct box that they can plug the phone into.
So this bad idea is thankfully dead. Of course now they'll lose the direct box or the cable . . .
Thank you to everyone chipped in.
From Radial, an 1/8” stereo DI that fits in a 1 gang wall box with level control, ground lift, mono switch and a pair of RCA’s for luck.
Possibly worth a look if you haven’t seen it.