"Ground" connection on preamp board

[craigen]

This preamp board has a "GRN" connection between the + and - on each channel. I understand that this is connected to a chassis. But I am only going to mount the board either on a board or in a plastic chassis, so do I need to wire this to anything? Photo attached. Thanks!

 

[Speedskater]

Attach it to the shields of all your interconnect cables.

What about the DC supply common?

 

[craigen]

The DC supply will only have +and - output connectors. Do you mean shielding on the interconnect cables from the preamp to the amp? And how would I access those? Thanks.

 

[chrisng]

It is balanced input, connect "GRN" to pin 1.

 

[craigen]

Thanks but I am using rca outputs. Does this mean I HAVE to use xlr? Is there way around this, I'd rather use RCA for the sake of simplicity... thanks

 

[rayma]

Not at all, just connect:

+ RCA (center pin) to + IN
- RCA (ground shell) to pin - IN
Also jumper together board pads - IN and ground.

 

[craigen]

thank you.This?

 

[rayma]

Yes, if the leftmost pad connection is the center pin of the RCA.