xlr's with six pins

[reelconfused]

I just saw an old JAN (joint army-navy) mixer/pre-amp with three "normal" xlr ins and one xlr out for a six-pin connector. What is that? Is it still possible to convert them to, say a 3-pin xlr?
-rc

 

[Derek Verner]

Could it possibly be a stereo output combined into one connector?

 

[Blue Bear Sound]

Are you sure it's not a combo connector? (ie, TRS and XLR in one jack....)

 

[Jblount]

What kind of configuration are the in?

 

[reelconfused]

It seems that the unit was originally designed to record along with 16mm film. The first two inputs were low inpedance mic intputs, the third is a high impetance. The output is about a quarter inch larger than a normal xlr, and is meant to run into the projector. So i'm guessing it's an early audio/video output, but I know nothing about video.
thanks for your replies,
-rc