How long have those Radian "Symbiotiks" been around? I took the cover off of one of my 808-8A's awhile back and I questioned if it was an Altec diaphragm. They came from my church, and were out of regular use for years, so I doubt they'd have anything of recent manufacture in them....... and by recent, I mean the last 10 to 15 years.

I don't even know hoe long Radian has been around....... any other non-Altec Symbiotiks?