Quadraphonic Tube Gear?

[Dean De Furia]

Probably a dumb question, but, did anyone ever make or market any 4 channel tube gear? The beginning of the quad era crossed with the end of the tube era so I thought...........

[proufo]

Originally posted by Dean De Furia
Probably a dumb question, but, did anyone ever make or market any 4 channel tube gear? The beginning of the quad era crossed with the end of the tube era so I thought...........
I'm 99.99% sure there were not.

Now, there's a Dolby ProLogic II preamp/decoder (that reportedly decodes QS accurately) by Jim Fosgate which is tubed, golden and expensive.