I haven’t had much luck with XQ. I don’t believe that Bluetooth can reliably find enough bandwidth for it, unless you’re willing to blow up a few neighbor’s WiFi points/baby monitors/microwaves/weather radar stations.
Fun fact to keep in mind about your MX4 - if you use the “pair with two devices simultaneously” feature, the headphones shut off their LDAC support. All you get is the baseline audio codec. Nice, huh?
An AAAA cell has 200-350 mohms internal resistance. A 9v battery has 6 of them in series (many of them are literally that, others have their cells as a stack of plastic buckets). The nose ring is a short run of wire, it’s idunno a 0.2 ohm heater?
My brother had a screen that would occasionally reboot with fullscreen video, but not if you kept some window decoration onscreen. There must’ve been some degree of (you can not turn it off) image processing that would shit itself. Maybe it was local dimming related.
Everything is filled with software, and a lot of it is hot garbage.