NuForce Ref 9 V2 User Manual

You may use any value from 50 to 200 ohm, it is not critical and does not affect
sound. Nuforce provides the 100-ohm resistors with the upgrade kit.
6. Install the new board, you will notice that the V2 board is slimmer and the heat sink is
on the opposite side close to the edge (9.02 board heatsink is closer to the power
supply). The green ground wire should be connected to one of the screws.

NuForce Ref 9 V2 Specifications

General

Brand	NuForce
Model	Ref 9 V2
Category	Amplifier
Language	English