I always thought 1050 XED was a great station. That 10,000 watt signal could be heard over much of So. Cal. before San Diego had a station on 1040. The format reminded me of the old WABC. XED played a happy, uptempo Regional Mexican song, followed by the same jingle every time. "Equis Ey Dey. La GRAAAAANNNNDDD Dey." Then the DJ would talk followed by a few commercials. Then another song. (OK, not "WABC, Ding!" but still fun to listen to.)
The last time I heard it, it didn't stick to these formatics. Maybe they were dated by now. I guess it's hard to run an AM station that relies on music, whether in the U.S. or Mexico. I suppose XED was still playing some of the same songs all these decades later for an older audience who might still tune in an AM station. In Los Angeles, 980 KFWB La Mira Mira, sounds like it's making money playing Classic Regional Mexican, sticking to good formatics, despite being an AM station playing music.
But I suppose the economics were just not working anymore for XED, as David tells us, in struggling Mexicali-Calexico. I believe the station was originally a daytimer, 10,000 watts, then signing off at sunset. Now I see it's 10,000 watts by day, but only 200 watts at night. Again, that's not going to make it in 2019 when FM stations are on the air around the clock.