The SP66 console has both VU meter buffer cards VU66 and a U79t correlation meter driver. Behind the door are PV46 line amps, EE66 elliptical EQ, VU 66 meter cards, and the U79 correlation meter. I also have the light beam meters but the rack isn’t tall enough to fit them.
The PEV are just plain PEV. Not PEVa. There were two versions. One had 60HZ as the low frequency center frequency and the others had 100Hz. These are 100Hz. There are four because it’s a four channel console. Two Preview channels and two Modulation channels.
This lathe was owned by Shure. It was the lathe used to make the test records. The SP66 came out of Masterdisk.