Any old Marantz Engineers recognize this load bank??

I picked up this custom made load bank a few years ago from a surplus store here in Minnesota that went out of business. I didn't even notice the Marantz tag until i got home. I am not sure who made it, but it I am guessing the engineering team at Marantz!! there are 250 watt resistors for 4 and 8 ohms for each channel and a temp controlled fan. the ammeter measures short circuit current!! would love to know the back story on this piece!!!


Zc
 

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