Seventh Circle Audio

I was looking through the schematic for the D11 and it looks like it just needs +- 27v to 48v and the pgnd. (IE pins 1,2 and 3)
Do any of the other pins to the powersupply need to be connected to supply the DI with power?

Yes, those are the grounds. Look for CGND and AGND in various places on the schematic. The only thing not necessary is pin 5, which supplies 48v for phantom power on the other modules.