"Input sensitivity selection
The latest version of miniDSP kit allows the user to select between two sensitivity settings.
Correctly matching the input sensitivity of a miniDSP will optimize the Analog to Digital conversion
and prevent any saturation. The two modes of operation are as follow:
o Low sensitivity mode: 0.9Vrms max on input, 0.9Vrms max on output
This mode is most likely the best setting for portable players (e.g. Ipod), A/V receiver with
a volume control, sources with a max output below 0.9Vrms.
o High sensitivity mode: 2Vrms max on input, 0.9Vrms max on output
miniDSP RevA vs RevB
miniDSP 2x4 comes in 2 configuration to adjust the maximum input level of the unit. The RevA has
a maximum input level of 0.9Vrms while the RevB has a max input level of 2Vrms. If you would like
to modify your unit, a simple screwdriver will allow you to open the panels of the unit and access
the internal jumpers as shown below." - from the manual
Edited by monomer - 3/28/13 at 7:42am