Originally Posted by nspindel
Hmmmm..... All I know is, I've got to crank it a lot higher to get the same listening volume.
I vote either placebo or a change at the source end you didn't realise.
Remember that the gain is set at the voltage gain stage (preamp stage) which was basically unchanged in this revision, and the switch on the front panel is switching between resistors that sit on the main board of the amplifier, not on the module.
As I said, there may be small differences, but having to crank the volume 'a lot higher'? Also, remember that the potentiometer doesn't have an exact curve - in this case, if you used to listen at 1 or 2 o'clock, turning the pot all the way round to 5 o'clock won't make a large volume difference. That's a big difference in volume pot setting, but a very small difference in actual output.