Hey Windell,
I did get it identified as a 1N4148, and luckily they had them at Radio Shack.
I replaced them and re-assembled the sub (tested the diodes before installing them). And no sound. I’m gong to have to t-shoot this better now. I had sound before I sprayed contact cleaner on the diode, so perhaps surrounding components are also failed.
Oh well, I almost had it fixed I guess.