Wow...some memories. I used to see Bogen stuff hooked to Shure Vocalmasters at the local school.
I don't know if it would be of any use or not...but, jeez, if they're cheap, you might buy 'em anyway, just for the halibut.
You might try using them to tinker with in a guitar effects chain. I remember years ago reading the liner notes for Chigago's "Transit Authority" LP...there was a Terry Kath thing called "Free Form Guitar"...actually a bunch of pseudopsychedelic whoopee bar effects...sorta Hendrix-esque. I remember the credits saying he ran his Strat through a Bogen pre-amp on that. Who knows...? Experiment...Dr. Gauss...
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"Cisco Kid, was a friend of mine...(WAH WAH WAH WAHHH!)"
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